diff --git a/sys/contrib/openzfs/cmd/zdb/zdb.c b/sys/contrib/openzfs/cmd/zdb/zdb.c
index b04b220c768e..d239da67613c 100644
--- a/sys/contrib/openzfs/cmd/zdb/zdb.c
+++ b/sys/contrib/openzfs/cmd/zdb/zdb.c
@@ -2377,7 +2377,8 @@ snprintf_blkptr_compact(char *blkbuf, size_t buflen, const blkptr_t *bp,
 			(void) snprintf(blkbuf + strlen(blkbuf),
 			    buflen - strlen(blkbuf), " %s", "FREE");
 		(void) snprintf(blkbuf + strlen(blkbuf),
-		    buflen - strlen(blkbuf), " cksum=%llx:%llx:%llx:%llx",
+		    buflen - strlen(blkbuf),
+		    " cksum=%016llx:%016llx:%016llx:%016llx",
 		    (u_longlong_t)bp->blk_cksum.zc_word[0],
 		    (u_longlong_t)bp->blk_cksum.zc_word[1],
 		    (u_longlong_t)bp->blk_cksum.zc_word[2],
@@ -7509,6 +7510,19 @@ mos_leak_log_spacemaps(spa_t *spa)
 		mos_obj_refd(sls->sls_sm_obj);
 }
 
+static void
+errorlog_count_refd(objset_t *mos, uint64_t errlog)
+{
+	zap_cursor_t zc;
+	zap_attribute_t za;
+	for (zap_cursor_init(&zc, mos, errlog);
+	    zap_cursor_retrieve(&zc, &za) == 0;
+	    zap_cursor_advance(&zc)) {
+		mos_obj_refd(za.za_first_integer);
+	}
+	zap_cursor_fini(&zc);
+}
+
 static int
 dump_mos_leaks(spa_t *spa)
 {
@@ -7529,6 +7543,12 @@ dump_mos_leaks(spa_t *spa)
 	mos_obj_refd(spa->spa_history);
 	mos_obj_refd(spa->spa_errlog_last);
 	mos_obj_refd(spa->spa_errlog_scrub);
+
+	if (!spa_feature_is_enabled(spa, SPA_FEATURE_HEAD_ERRLOG)) {
+		errorlog_count_refd(mos, spa->spa_errlog_last);
+		errorlog_count_refd(mos, spa->spa_errlog_scrub);
+	}
+
 	mos_obj_refd(spa->spa_all_vdev_zaps);
 	mos_obj_refd(spa->spa_dsl_pool->dp_bptree_obj);
 	mos_obj_refd(spa->spa_dsl_pool->dp_tmp_userrefs_obj);
@@ -8364,7 +8384,9 @@ zdb_read_block(char *thing, spa_t *spa)
 				    DVA_GET_OFFSET(&bp->blk_dva[0]);
 				ck_zio->io_bp = bp;
 				zio_checksum_compute(ck_zio, ck, pabd, lsize);
-				printf("%12s\tcksum=%llx:%llx:%llx:%llx\n",
+				printf(
+				    "%12s\t"
+				    "cksum=%016llx:%016llx:%016llx:%016llx\n",
 				    zio_checksum_table[ck].ci_name,
 				    (u_longlong_t)bp->blk_cksum.zc_word[0],
 				    (u_longlong_t)bp->blk_cksum.zc_word[1],
diff --git a/sys/contrib/openzfs/cmd/zfs/zfs_main.c b/sys/contrib/openzfs/cmd/zfs/zfs_main.c
index 5880343a92f3..b1b00738569b 100644
--- a/sys/contrib/openzfs/cmd/zfs/zfs_main.c
+++ b/sys/contrib/openzfs/cmd/zfs/zfs_main.c
@@ -4532,7 +4532,7 @@ zfs_do_send(int argc, char **argv)
 		}
 	}
 
-	if (flags.parsable && flags.verbosity == 0)
+	if ((flags.parsable || flags.progressastitle) && flags.verbosity == 0)
 		flags.verbosity = 1;
 
 	if (excludes.count > 0 && !flags.replicate) {
@@ -8672,7 +8672,6 @@ main(int argc, char **argv)
 	int i = 0;
 	const char *cmdname;
 	char **newargv;
-	extern char **environ;
 
 	(void) setlocale(LC_ALL, "");
 	(void) setlocale(LC_NUMERIC, "C");
diff --git a/sys/contrib/openzfs/cmd/zpool/zpool_main.c b/sys/contrib/openzfs/cmd/zpool/zpool_main.c
index 93d6a18981cb..efb2d10e591b 100644
--- a/sys/contrib/openzfs/cmd/zpool/zpool_main.c
+++ b/sys/contrib/openzfs/cmd/zpool/zpool_main.c
@@ -7524,19 +7524,20 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 
 	zfs_nicebytes(ps->pss_processed, processed_buf, sizeof (processed_buf));
 
-	assert(ps->pss_func == POOL_SCAN_SCRUB ||
-	    ps->pss_func == POOL_SCAN_RESILVER);
+	int is_resilver = ps->pss_func == POOL_SCAN_RESILVER;
+	int is_scrub = ps->pss_func == POOL_SCAN_SCRUB;
+	assert(is_resilver || is_scrub);
 
 	/* Scan is finished or canceled. */
 	if (ps->pss_state == DSS_FINISHED) {
 		secs_to_dhms(end - start, time_buf);
 
-		if (ps->pss_func == POOL_SCAN_SCRUB) {
+		if (is_scrub) {
 			(void) printf(gettext("scrub repaired %s "
 			    "in %s with %llu errors on %s"), processed_buf,
 			    time_buf, (u_longlong_t)ps->pss_errors,
 			    ctime(&end));
-		} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+		} else if (is_resilver) {
 			(void) printf(gettext("resilvered %s "
 			    "in %s with %llu errors on %s"), processed_buf,
 			    time_buf, (u_longlong_t)ps->pss_errors,
@@ -7544,10 +7545,10 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 		}
 		return;
 	} else if (ps->pss_state == DSS_CANCELED) {
-		if (ps->pss_func == POOL_SCAN_SCRUB) {
+		if (is_scrub) {
 			(void) printf(gettext("scrub canceled on %s"),
 			    ctime(&end));
-		} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+		} else if (is_resilver) {
 			(void) printf(gettext("resilver canceled on %s"),
 			    ctime(&end));
 		}
@@ -7557,7 +7558,7 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 	assert(ps->pss_state == DSS_SCANNING);
 
 	/* Scan is in progress. Resilvers can't be paused. */
-	if (ps->pss_func == POOL_SCAN_SCRUB) {
+	if (is_scrub) {
 		if (pause == 0) {
 			(void) printf(gettext("scrub in progress since %s"),
 			    ctime(&start));
@@ -7567,7 +7568,7 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 			(void) printf(gettext("\tscrub started on %s"),
 			    ctime(&start));
 		}
-	} else if (ps->pss_func == POOL_SCAN_RESILVER) {
+	} else if (is_resilver) {
 		(void) printf(gettext("resilver in progress since %s"),
 		    ctime(&start));
 	}
@@ -7609,17 +7610,27 @@ print_scan_scrub_resilver_status(pool_scan_stat_t *ps)
 		    scanned_buf, issued_buf, total_buf);
 	}
 
-	if (ps->pss_func == POOL_SCAN_RESILVER) {
+	if (is_resilver) {
 		(void) printf(gettext("\t%s resilvered, %.2f%% done"),
 		    processed_buf, 100 * fraction_done);
-	} else if (ps->pss_func == POOL_SCAN_SCRUB) {
+	} else if (is_scrub) {
 		(void) printf(gettext("\t%s repaired, %.2f%% done"),
 		    processed_buf, 100 * fraction_done);
 	}
 
 	if (pause == 0) {
+		/*
+		 * Only provide an estimate iff:
+		 * 1) the time remaining is valid, and
+		 * 2) the issue rate exceeds 10 MB/s, and
+		 * 3) it's either:
+		 *    a) a resilver which has started repairs, or
+		 *    b) a scrub which has entered the issue phase.
+		 */
 		if (total_secs_left != UINT64_MAX &&
-		    issue_rate >= 10 * 1024 * 1024) {
+		    issue_rate >= 10 * 1024 * 1024 &&
+		    ((is_resilver && ps->pss_processed > 0) ||
+		    (is_scrub && issued > 0))) {
 			(void) printf(gettext(", %s to go\n"), time_buf);
 		} else {
 			(void) printf(gettext(", no estimated "
diff --git a/sys/contrib/openzfs/config/kernel-filemap.m4 b/sys/contrib/openzfs/config/kernel-filemap.m4
new file mode 100644
index 000000000000..745928168f92
--- /dev/null
+++ b/sys/contrib/openzfs/config/kernel-filemap.m4
@@ -0,0 +1,26 @@
+dnl #
+dnl # filemap_range_has_page was not available till 4.13
+dnl #
+AC_DEFUN([ZFS_AC_KERNEL_SRC_FILEMAP], [
+	ZFS_LINUX_TEST_SRC([filemap_range_has_page], [
+		#include <linux/fs.h>
+	],[
+		struct address_space *mapping = NULL;
+		loff_t lstart = 0;
+		loff_t lend = 0;
+		bool ret __attribute__ ((unused));
+
+		ret = filemap_range_has_page(mapping, lstart, lend);
+	])
+])
+
+AC_DEFUN([ZFS_AC_KERNEL_FILEMAP], [
+	AC_MSG_CHECKING([whether filemap_range_has_page() is available])
+	ZFS_LINUX_TEST_RESULT([filemap_range_has_page], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_FILEMAP_RANGE_HAS_PAGE, 1,
+		[filemap_range_has_page() is available])
+	],[
+		AC_MSG_RESULT(no)
+	])
+])
diff --git a/sys/contrib/openzfs/config/kernel.m4 b/sys/contrib/openzfs/config/kernel.m4
index 353988e9c867..121d73ef641a 100644
--- a/sys/contrib/openzfs/config/kernel.m4
+++ b/sys/contrib/openzfs/config/kernel.m4
@@ -150,6 +150,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
 	ZFS_AC_KERNEL_SRC_USER_NS_COMMON_INUM
 	ZFS_AC_KERNEL_SRC_IDMAP_MNT_API
 	ZFS_AC_KERNEL_SRC_IATTR_VFSID
+	ZFS_AC_KERNEL_SRC_FILEMAP
 
 	AC_MSG_CHECKING([for available kernel interfaces])
 	ZFS_LINUX_TEST_COMPILE_ALL([kabi])
@@ -273,6 +274,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
 	ZFS_AC_KERNEL_USER_NS_COMMON_INUM
 	ZFS_AC_KERNEL_IDMAP_MNT_API
 	ZFS_AC_KERNEL_IATTR_VFSID
+	ZFS_AC_KERNEL_FILEMAP
 ])
 
 dnl #
diff --git a/sys/contrib/openzfs/contrib/initramfs/scripts/zfs b/sys/contrib/openzfs/contrib/initramfs/scripts/zfs
index c724f0c2cf57..d1a99e4a87ba 100644
--- a/sys/contrib/openzfs/contrib/initramfs/scripts/zfs
+++ b/sys/contrib/openzfs/contrib/initramfs/scripts/zfs
@@ -272,30 +272,46 @@ import_pool()
 # with more logging etc.
 load_module_initrd()
 {
-	[ -n "$ROOTDELAY" ] && ZFS_INITRD_PRE_MOUNTROOT_SLEEP="$ROOTDELAY"
+	ZFS_INITRD_PRE_MOUNTROOT_SLEEP=${ROOTDELAY:-0}
 
-	if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" -gt 0 ] 2>/dev/null
-	then
-		if [ "$quiet" != "y" ]; then
-			zfs_log_begin_msg "Sleeping for" \
-				"$ZFS_INITRD_PRE_MOUNTROOT_SLEEP seconds..."
+	if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" -gt 0 ]; then
+		[ "$quiet" != "y" ] && zfs_log_begin_msg "Delaying for up to '${ZFS_INITRD_PRE_MOUNTROOT_SLEEP}' seconds."
+	fi
+
+	START=$(/bin/date -u +%s)
+	END=$((START+ZFS_INITRD_PRE_MOUNTROOT_SLEEP))
+	while true; do
+
+		# Wait for all of the /dev/{hd,sd}[a-z] device nodes to appear.
+		if command -v wait_for_udev > /dev/null 2>&1 ; then
+			wait_for_udev 10
+		elif command -v wait_for_dev > /dev/null 2>&1 ; then
+			wait_for_dev
 		fi
-		sleep "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP"
+
+		#
+		# zpool import refuse to import without a valid
+		# /proc/self/mounts
+		#
+		[ ! -f /proc/self/mounts ] && mount proc /proc
+
+		# Load the module
+		if load_module "zfs"; then
+			ret=0
+			break
+		else
+			ret=1
+		fi
+
+		[ "$(/bin/date -u +%s)" -gt "$END" ] && break
+		sleep 1
+
+	done
+	if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" -gt 0 ]; then
 		[ "$quiet" != "y" ] && zfs_log_end_msg
 	fi
 
-	# Wait for all of the /dev/{hd,sd}[a-z] device nodes to appear.
-	if command -v wait_for_udev > /dev/null 2>&1 ; then
-		wait_for_udev 10
-	elif command -v wait_for_dev > /dev/null 2>&1 ; then
-		wait_for_dev
-	fi
-
-	# zpool import refuse to import without a valid /proc/self/mounts
-	[ ! -f /proc/self/mounts ] && mount proc /proc
-
-	# Load the module
-	load_module "zfs" || return 1
+	[ "$ret" -ne 0 ] && return 1
 
 	if [ "$ZFS_INITRD_POST_MODPROBE_SLEEP" -gt 0 ] 2>/dev/null
 	then
@@ -343,9 +359,11 @@ mount_fs()
 				# isn't the root fs.
 				return 0
 			fi
-			ZFS_CMD="mount.zfs"
 			# Last hail-mary: Hope 'rootmnt' is set!
 			mountpoint=""
+			if [ "$mountpoint" = "legacy" ]; then
+				ZFS_CMD="mount.zfs"
+			fi
 		else
 			mountpoint="$mountpoint1"
 		fi
diff --git a/sys/contrib/openzfs/include/libzutil.h b/sys/contrib/openzfs/include/libzutil.h
index 4d4bddaad5f3..948ac08cd772 100644
--- a/sys/contrib/openzfs/include/libzutil.h
+++ b/sys/contrib/openzfs/include/libzutil.h
@@ -183,6 +183,7 @@ _LIBZUTIL_H int printf_color(const char *color, const char *format, ...);
 _LIBZUTIL_H const char *zfs_basename(const char *path);
 _LIBZUTIL_H ssize_t zfs_dirnamelen(const char *path);
 #ifdef __linux__
+extern char **environ;
 _LIBZUTIL_H void zfs_setproctitle_init(int argc, char *argv[], char *envp[]);
 _LIBZUTIL_H void zfs_setproctitle(const char *fmt, ...);
 #else
diff --git a/sys/contrib/openzfs/include/os/freebsd/spl/sys/ia32/asm_linkage.h b/sys/contrib/openzfs/include/os/freebsd/spl/sys/ia32/asm_linkage.h
index 058d600007af..1ebfd8350661 100644
--- a/sys/contrib/openzfs/include/os/freebsd/spl/sys/ia32/asm_linkage.h
+++ b/sys/contrib/openzfs/include/os/freebsd/spl/sys/ia32/asm_linkage.h
@@ -36,7 +36,7 @@
 #define	ENDBR
 
 #define	SECTION_TEXT .text
-#define	SECTION_STATIC .data
+#define	SECTION_STATIC .rodata
 
 #ifdef	__cplusplus
 extern "C" {
diff --git a/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h b/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h
index 41a5bb218c12..8cde33dbcbbb 100644
--- a/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h
+++ b/sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_znode_impl.h
@@ -116,7 +116,8 @@ typedef struct zfs_soft_state {
 #define	Z_ISLNK(type) ((type) == VLNK)
 #define	Z_ISDIR(type) ((type) == VDIR)
 
-#define	zn_has_cached_data(zp)		vn_has_cached_data(ZTOV(zp))
+#define	zn_has_cached_data(zp, start, end) \
+    vn_has_cached_data(ZTOV(zp))
 #define	zn_flush_cached_data(zp, sync)	vn_flush_cached_data(ZTOV(zp), sync)
 #define	zn_rlimit_fsize(zp, uio) \
     vn_rlimit_fsize(ZTOV(zp), GET_UIO_STRUCT(uio), zfs_uio_td(uio))
diff --git a/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h b/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h
index 2c734322267a..15dc77edafac 100644
--- a/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h
+++ b/sys/contrib/openzfs/include/os/linux/zfs/sys/trace_acl.h
@@ -62,7 +62,6 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	    __field(uint32_t,		z_async_writes_cnt)
 	    __field(mode_t,		z_mode)
 	    __field(boolean_t,		z_is_sa)
-	    __field(boolean_t,		z_is_mapped)
 	    __field(boolean_t,		z_is_ctldir)
 
 	    __field(uint32_t,		i_uid)
@@ -96,7 +95,6 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	    __entry->z_async_writes_cnt	= zn->z_async_writes_cnt;
 	    __entry->z_mode		= zn->z_mode;
 	    __entry->z_is_sa		= zn->z_is_sa;
-	    __entry->z_is_mapped	= zn->z_is_mapped;
 	    __entry->z_is_ctldir	= zn->z_is_ctldir;
 
 	    __entry->i_uid		= KUID_TO_SUID(ZTOI(zn)->i_uid);
@@ -119,7 +117,7 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	    "zn_prefetch %u blksz %u seq %u "
 	    "mapcnt %llu size %llu pflags %llu "
 	    "sync_cnt %u sync_writes_cnt %u async_writes_cnt %u "
-	    "mode 0x%x is_sa %d is_mapped %d is_ctldir %d "
+	    "mode 0x%x is_sa %d is_ctldir %d "
 	    "inode { uid %u gid %u ino %lu nlink %u size %lli "
 	    "blkbits %u bytes %u mode 0x%x generation %x } } "
 	    "ace { type %u flags %u access_mask %u } mask_matched %u",
@@ -128,9 +126,8 @@ DECLARE_EVENT_CLASS(zfs_ace_class,
 	    __entry->z_seq, __entry->z_mapcnt, __entry->z_size,
 	    __entry->z_pflags, __entry->z_sync_cnt,
 	    __entry->z_sync_writes_cnt, __entry->z_async_writes_cnt,
-	    __entry->z_mode, __entry->z_is_sa, __entry->z_is_mapped,
-	    __entry->z_is_ctldir, __entry->i_uid,
-	    __entry->i_gid, __entry->i_ino, __entry->i_nlink,
+	    __entry->z_mode, __entry->z_is_sa, __entry->z_is_ctldir,
+	    __entry->i_uid, __entry->i_gid, __entry->i_ino, __entry->i_nlink,
 	    __entry->i_size, __entry->i_blkbits,
 	    __entry->i_bytes, __entry->i_mode, __entry->i_generation,
 	    __entry->z_type, __entry->z_flags, __entry->z_access_mask,
diff --git a/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h b/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h
index 52568781011f..81607ef2a25e 100644
--- a/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h
+++ b/sys/contrib/openzfs/include/os/linux/zfs/sys/zfs_znode_impl.h
@@ -47,9 +47,16 @@
 extern "C" {
 #endif
 
+#if defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
 #define	ZNODE_OS_FIELDS			\
 	inode_timespec_t z_btime; /* creation/birth time (cached) */ \
 	struct inode	z_inode;
+#else
+#define	ZNODE_OS_FIELDS			\
+	inode_timespec_t z_btime; /* creation/birth time (cached) */ \
+	struct inode	z_inode;                                     \
+	boolean_t	z_is_mapped;    /* we are mmap'ed */
+#endif
 
 /*
  * Convert between znode pointers and inode pointers
@@ -70,7 +77,14 @@ extern "C" {
 #define	Z_ISDEV(type)	(S_ISCHR(type) || S_ISBLK(type) || S_ISFIFO(type))
 #define	Z_ISDIR(type)	S_ISDIR(type)
 
-#define	zn_has_cached_data(zp)		((zp)->z_is_mapped)
+#if defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
+#define	zn_has_cached_data(zp, start, end) \
+	filemap_range_has_page(ZTOI(zp)->i_mapping, start, end)
+#else
+#define	zn_has_cached_data(zp, start, end) \
+	((zp)->z_is_mapped)
+#endif
+
 #define	zn_flush_cached_data(zp, sync)	write_inode_now(ZTOI(zp), sync)
 #define	zn_rlimit_fsize(zp, uio)	(0)
 
diff --git a/sys/contrib/openzfs/include/sys/bpobj.h b/sys/contrib/openzfs/include/sys/bpobj.h
index 84f0ee76c44e..f3384f526454 100644
--- a/sys/contrib/openzfs/include/sys/bpobj.h
+++ b/sys/contrib/openzfs/include/sys/bpobj.h
@@ -87,6 +87,7 @@ int livelist_bpobj_iterate_from_nofree(bpobj_t *bpo, bpobj_itor_t func,
     void *arg, int64_t start);
 
 void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
+void bpobj_prefetch_subobj(bpobj_t *bpo, uint64_t subobj);
 void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, boolean_t bp_freed,
     dmu_tx_t *tx);
 
diff --git a/sys/contrib/openzfs/include/sys/dsl_dataset.h b/sys/contrib/openzfs/include/sys/dsl_dataset.h
index 3450527af7e0..b0d8c7994c07 100644
--- a/sys/contrib/openzfs/include/sys/dsl_dataset.h
+++ b/sys/contrib/openzfs/include/sys/dsl_dataset.h
@@ -372,6 +372,7 @@ int dsl_dataset_rename_snapshot(const char *fsname,
     const char *oldsnapname, const char *newsnapname, boolean_t recursive);
 int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
     minor_t cleanup_minor, const char *htag);
+boolean_t zfeature_active(spa_feature_t f, void *arg);
 
 blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
 
diff --git a/sys/contrib/openzfs/include/sys/spa.h b/sys/contrib/openzfs/include/sys/spa.h
index 500eb3491a99..c9d03bf645a9 100644
--- a/sys/contrib/openzfs/include/sys/spa.h
+++ b/sys/contrib/openzfs/include/sys/spa.h
@@ -678,7 +678,7 @@ typedef struct blkptr {
 		len += func(buf + len, size - len,			\
 		    "[L%llu %s] %s %s %s %s %s %s %s%c"			\
 		    "size=%llxL/%llxP birth=%lluL/%lluP fill=%llu%c"	\
-		    "cksum=%llx:%llx:%llx:%llx",			\
+		    "cksum=%016llx:%016llx:%016llx:%016llx",		\
 		    (u_longlong_t)BP_GET_LEVEL(bp),			\
 		    type,						\
 		    checksum,						\
diff --git a/sys/contrib/openzfs/include/sys/zfs_znode.h b/sys/contrib/openzfs/include/sys/zfs_znode.h
index de38f56dc32d..fcee55b0199d 100644
--- a/sys/contrib/openzfs/include/sys/zfs_znode.h
+++ b/sys/contrib/openzfs/include/sys/zfs_znode.h
@@ -188,7 +188,6 @@ typedef struct znode {
 	boolean_t	z_atime_dirty;	/* atime needs to be synced */
 	boolean_t	z_zn_prefetch;	/* Prefetch znodes? */
 	boolean_t	z_is_sa;	/* are we native sa? */
-	boolean_t	z_is_mapped;	/* are we mmap'ed */
 	boolean_t	z_is_ctldir;	/* are we .zfs entry */
 	boolean_t	z_suspended;	/* extra ref from a suspend? */
 	uint_t		z_blksz;	/* block size in bytes */
diff --git a/sys/contrib/openzfs/lib/libshare/nfs.c b/sys/contrib/openzfs/lib/libshare/nfs.c
index 118ad7ef2209..3962c87453d4 100644
--- a/sys/contrib/openzfs/lib/libshare/nfs.c
+++ b/sys/contrib/openzfs/lib/libshare/nfs.c
@@ -97,7 +97,7 @@ nfs_init_tmpfile(const char *prefix, const char *mdir, struct tmpfile *tmpf)
 	}
 
 	strlcpy(tmpf->name, prefix, sizeof (tmpf->name));
-	strlcat(tmpf->name, ".XXXXXXXX", sizeof (tmpf->name) - strlen(prefix));
+	strlcat(tmpf->name, ".XXXXXXXX", sizeof (tmpf->name));
 
 	int fd = mkostemp(tmpf->name, O_CLOEXEC);
 	if (fd == -1) {
diff --git a/sys/contrib/openzfs/lib/libspl/include/os/freebsd/sys/ia32/asm_linkage.h b/sys/contrib/openzfs/lib/libspl/include/os/freebsd/sys/ia32/asm_linkage.h
index 9964f183cc68..08c73037990f 100644
--- a/sys/contrib/openzfs/lib/libspl/include/os/freebsd/sys/ia32/asm_linkage.h
+++ b/sys/contrib/openzfs/lib/libspl/include/os/freebsd/sys/ia32/asm_linkage.h
@@ -40,7 +40,7 @@
 #define	ENDBR
 
 #define	SECTION_TEXT .text
-#define	SECTION_STATIC .data
+#define	SECTION_STATIC .rodata
 
 #ifdef	__cplusplus
 extern "C" {
diff --git a/sys/contrib/openzfs/lib/libzfs/libzfs_mount.c b/sys/contrib/openzfs/lib/libzfs/libzfs_mount.c
index 57737bc6c01a..8612e082ba34 100644
--- a/sys/contrib/openzfs/lib/libzfs/libzfs_mount.c
+++ b/sys/contrib/openzfs/lib/libzfs/libzfs_mount.c
@@ -1422,10 +1422,10 @@ zpool_disable_datasets(zpool_handle_t *zhp, boolean_t force)
 	 * Walk through and first unshare everything.
 	 */
 	for (i = 0; i < used; i++) {
-		for (enum sa_protocol i = 0; i < SA_PROTOCOL_COUNT; ++i) {
-			if (sa_is_shared(sets[i].mountpoint, i) &&
+		for (enum sa_protocol p = 0; p < SA_PROTOCOL_COUNT; ++p) {
+			if (sa_is_shared(sets[i].mountpoint, p) &&
 			    unshare_one(hdl, sets[i].mountpoint,
-			    sets[i].mountpoint, i) != 0)
+			    sets[i].mountpoint, p) != 0)
 				goto out;
 		}
 	}
diff --git a/sys/contrib/openzfs/lib/libzfs/libzfs_sendrecv.c b/sys/contrib/openzfs/lib/libzfs/libzfs_sendrecv.c
index 038613a1fcfa..66a22e333663 100644
--- a/sys/contrib/openzfs/lib/libzfs/libzfs_sendrecv.c
+++ b/sys/contrib/openzfs/lib/libzfs/libzfs_sendrecv.c
@@ -84,6 +84,7 @@ typedef struct progress_arg {
 	boolean_t pa_estimate;
 	int pa_verbosity;
 	boolean_t pa_astitle;
+	boolean_t pa_progress;
 	uint64_t pa_size;
 } progress_arg_t;
 
@@ -940,7 +941,7 @@ send_progress_thread(void *arg)
 	struct tm tm;
 	int err;
 
-	if (!pa->pa_parsable && pa->pa_verbosity != 0) {
+	if (!pa->pa_parsable && pa->pa_progress) {
 		(void) fprintf(stderr,
 		    "TIME       %s   %sSNAPSHOT %s\n",
 		    pa->pa_estimate ? "BYTES" : " SENT",
@@ -990,7 +991,7 @@ send_progress_thread(void *arg)
 			(void) fprintf(stderr, "%02d:%02d:%02d\t%llu\t%s\n",
 			    tm.tm_hour, tm.tm_min, tm.tm_sec,
 			    (u_longlong_t)bytes, zhp->zfs_name);
-		} else if (pa->pa_verbosity != 0) {
+		} else if (pa->pa_progress) {
 			zfs_nicebytes(bytes, buf, sizeof (buf));
 			(void) fprintf(stderr, "%02d:%02d:%02d   %5s   %s\n",
 			    tm.tm_hour, tm.tm_min, tm.tm_sec,
@@ -1206,6 +1207,7 @@ dump_snapshot(zfs_handle_t *zhp, void *arg)
 			pa.pa_verbosity = sdd->verbosity;
 			pa.pa_size = sdd->size;
 			pa.pa_astitle = sdd->progressastitle;
+			pa.pa_progress = sdd->progress;
 
 			if ((err = pthread_create(&tid, NULL,
 			    send_progress_thread, &pa)) != 0) {
@@ -1886,6 +1888,7 @@ zfs_send_resume_impl_cb_impl(libzfs_handle_t *hdl, sendflags_t *flags,
 			pa.pa_verbosity = flags->verbosity;
 			pa.pa_size = size;
 			pa.pa_astitle = flags->progressastitle;
+			pa.pa_progress = flags->progress;
 
 			error = pthread_create(&tid, NULL,
 			    send_progress_thread, &pa);
@@ -2696,6 +2699,7 @@ zfs_send_one_cb_impl(zfs_handle_t *zhp, const char *from, int fd,
 		pa.pa_verbosity = flags->verbosity;
 		pa.pa_size = size;
 		pa.pa_astitle = flags->progressastitle;
+		pa.pa_progress = flags->progress;
 
 		err = pthread_create(&ptid, NULL,
 		    send_progress_thread, &pa);
@@ -4586,7 +4590,7 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
 			    B_FALSE, destsnap) == 0) {
 				*strchr(destsnap, '@') = '\0';
 				(void) strlcat(destsnap, suffix,
-				    sizeof (destsnap) - strlen(destsnap));
+				    sizeof (destsnap));
 			}
 		}
 	} else {
@@ -4622,7 +4626,7 @@ zfs_receive_one(libzfs_handle_t *hdl, int infd, const char *tosnap,
 			    B_FALSE, destsnap) == 0) {
 				*strchr(destsnap, '@') = '\0';
 				(void) strlcat(destsnap, snap,
-				    sizeof (destsnap) - strlen(destsnap));
+				    sizeof (destsnap));
 			}
 		}
 	}
diff --git a/sys/contrib/openzfs/man/man4/zfs.4 b/sys/contrib/openzfs/man/man4/zfs.4
index e20d601340c6..88a044f63f28 100644
--- a/sys/contrib/openzfs/man/man4/zfs.4
+++ b/sys/contrib/openzfs/man/man4/zfs.4
@@ -1769,7 +1769,7 @@ completes in order to verify the checksums of all blocks which have been
 resilvered.
 This is enabled by default and strongly recommended.
 .
-.It Sy zfs_rebuild_vdev_limit Ns = Ns Sy 33554432 Ns B Po 32 MiB Pc Pq u64
+.It Sy zfs_rebuild_vdev_limit Ns = Ns Sy 67108864 Ns B Po 64 MiB Pc Pq u64
 Maximum amount of I/O that can be concurrently issued for a sequential
 resilver per leaf device, given in bytes.
 .
@@ -1890,6 +1890,13 @@ I/O.
 In this case (unless the metadata scan is done) we stop issuing verification I/O
 and start scanning metadata again until we get to the hard limit.
 .
+.It Sy zfs_scan_report_txgs Ns = Ns Sy 0 Ns | Ns 1 Pq uint
+When reporting resilver throughput and estimated completion time use the
+performance observed over roughly the last
+.Sy zfs_scan_report_txgs
+TXGs.
+When set to zero performance is calculated over the time between checkpoints.
+.
 .It Sy zfs_scan_strict_mem_lim Ns = Ns Sy 0 Ns | Ns 1 Pq int
 Enforce tight memory limits on pool scans when a sequential scan is in progress.
 When disabled, the memory limit may be exceeded by fast disks.
@@ -1898,7 +1905,7 @@ When disabled, the memory limit may be exceeded by fast disks.
 Freezes a scrub/resilver in progress without actually pausing it.
 Intended for testing/debugging.
 .
-.It Sy zfs_scan_vdev_limit Ns = Ns Sy 4194304 Ns B Po 4 MiB Pc Pq int
+.It Sy zfs_scan_vdev_limit Ns = Ns Sy 16777216 Ns B Po 16 MiB Pc Pq int
 Maximum amount of data that can be concurrently issued at once for scrubs and
 resilvers per leaf device, given in bytes.
 .
diff --git a/sys/contrib/openzfs/module/icp/asm-x86_64/blake3/blake3_avx2.S b/sys/contrib/openzfs/module/icp/asm-x86_64/blake3/blake3_avx2.S
index 8f9e766486f1..0ebec5c1095e 100644
--- a/sys/contrib/openzfs/module/icp/asm-x86_64/blake3/blake3_avx2.S
+++ b/sys/contrib/openzfs/module/icp/asm-x86_64/blake3/blake3_avx2.S
@@ -1791,7 +1791,6 @@ ENTRY_ALIGN(zfs_blake3_hash_many_avx2, 64)
 SET_SIZE(zfs_blake3_hash_many_avx2)
 
 SECTION_STATIC
-.section .rodata
 
 .p2align  6
 ADD0:
diff --git a/sys/contrib/openzfs/module/icp/asm-x86_64/modes/aesni-gcm-x86_64.S b/sys/contrib/openzfs/module/icp/asm-x86_64/modes/aesni-gcm-x86_64.S
index 165492a0ed76..909b2147dff9 100644
--- a/sys/contrib/openzfs/module/icp/asm-x86_64/modes/aesni-gcm-x86_64.S
+++ b/sys/contrib/openzfs/module/icp/asm-x86_64/modes/aesni-gcm-x86_64.S
@@ -53,6 +53,11 @@
 /* Windows userland links with OpenSSL */
 #if !defined (_WIN32) || defined (_KERNEL)
 
+/* Apple needs _ */
+#if defined (__APPLE__)
+#define	gcm_avx_can_use_movbe _gcm_avx_can_use_movbe
+#endif
+
 .extern gcm_avx_can_use_movbe
 
 .text
diff --git a/sys/contrib/openzfs/module/icp/asm-x86_64/modes/gcm_pclmulqdq.S b/sys/contrib/openzfs/module/icp/asm-x86_64/modes/gcm_pclmulqdq.S
index e40b3df32753..dec782fda33e 100644
--- a/sys/contrib/openzfs/module/icp/asm-x86_64/modes/gcm_pclmulqdq.S
+++ b/sys/contrib/openzfs/module/icp/asm-x86_64/modes/gcm_pclmulqdq.S
@@ -101,7 +101,7 @@ gcm_mul_pclmulqdq(uint64_t *x_in, uint64_t *y, uint64_t *res) {
 
 // static uint8_t byte_swap16_mask[] = {
 //	 15, 14, 13, 12, 11, 10, 9, 8, 7, 6 ,5, 4, 3, 2, 1, 0 };
-.section .rodata
+SECTION_STATIC
 .balign XMM_ALIGN
 .Lbyte_swap16_mask:
 	.byte	15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
diff --git a/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha256_impl.S b/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha256_impl.S
index f3d701528459..f1fde51c1d69 100644
--- a/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha256_impl.S
+++ b/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha256_impl.S
@@ -2063,7 +2063,7 @@ ENTRY_NP(SHA256TransformBlocks)
 .cfi_endproc
 SET_SIZE(SHA256TransformBlocks)
 
-.section .rodata
+SECTION_STATIC
 .balign	64
 SET_OBJ(K256)
 K256:
diff --git a/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha512_impl.S b/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha512_impl.S
index 520f5b6dab24..b2f7d4863d8a 100644
--- a/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha512_impl.S
+++ b/sys/contrib/openzfs/module/icp/asm-x86_64/sha2/sha512_impl.S
@@ -2064,7 +2064,7 @@ ENTRY_NP(SHA512TransformBlocks)
 .cfi_endproc
 SET_SIZE(SHA512TransformBlocks)
 
-.section .rodata
+SECTION_STATIC
 .balign	64
 SET_OBJ(K512)
 K512:
@@ -2113,4 +2113,3 @@ K512:
 #if defined(__ELF__)
 .section .note.GNU-stack,"",%progbits
 #endif
-
diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/kmod_core.c b/sys/contrib/openzfs/module/os/freebsd/zfs/kmod_core.c
index e4c6cf7d097d..9a268573528c 100644
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/kmod_core.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/kmod_core.c
@@ -142,7 +142,7 @@ zfsdev_ioctl(struct cdev *dev, ulong_t zcmd, caddr_t arg, int flag,
 		return (EINVAL);
 
 	uaddr = (void *)(uintptr_t)zp->zfs_cmd;
-	zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+	zc = vmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
 #ifdef ZFS_LEGACY_SUPPORT
 	/*
 	 * Remap ioctl code for legacy user binaries
@@ -150,10 +150,10 @@ zfsdev_ioctl(struct cdev *dev, ulong_t zcmd, caddr_t arg, int flag,
 	if (zp->zfs_ioctl_version == ZFS_IOCVER_LEGACY) {
 		vecnum = zfs_ioctl_legacy_to_ozfs(vecnum);
 		if (vecnum < 0) {
-			kmem_free(zc, sizeof (zfs_cmd_t));
+			vmem_free(zc, sizeof (zfs_cmd_t));
 			return (ENOTSUP);
 		}
-		zcl = kmem_zalloc(sizeof (zfs_cmd_legacy_t), KM_SLEEP);
+		zcl = vmem_zalloc(sizeof (zfs_cmd_legacy_t), KM_SLEEP);
 		if (copyin(uaddr, zcl, sizeof (zfs_cmd_legacy_t))) {
 			error = SET_ERROR(EFAULT);
 			goto out;
@@ -180,9 +180,9 @@ zfsdev_ioctl(struct cdev *dev, ulong_t zcmd, caddr_t arg, int flag,
 out:
 #ifdef ZFS_LEGACY_SUPPORT
 	if (zcl)
-		kmem_free(zcl, sizeof (zfs_cmd_legacy_t));
+		vmem_free(zcl, sizeof (zfs_cmd_legacy_t));
 #endif
-	kmem_free(zc, sizeof (zfs_cmd_t));
+	vmem_free(zc, sizeof (zfs_cmd_t));
 	MPASS(tsd_get(rrw_tsd_key) == NULL);
 	return (error);
 }
diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vfsops.c b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vfsops.c
index 2820f10b5de8..a1e0595bda34 100644
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vfsops.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vfsops.c
@@ -230,7 +230,8 @@ zfs_get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, uint64_t *val,
 
 	vfs_unbusy(vfsp);
 	if (tmp != *val) {
-		(void) strcpy(setpoint, "temporary");
+		if (setpoint)
+			(void) strcpy(setpoint, "temporary");
 		*val = tmp;
 	}
 	return (0);
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/abd_os.c b/sys/contrib/openzfs/module/os/linux/zfs/abd_os.c
index 16530d82693e..13150adbe0cf 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/abd_os.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/abd_os.c
@@ -272,18 +272,20 @@ abd_alloc_chunks(abd_t *abd, size_t size)
 	struct page *page, *tmp_page = NULL;
 	gfp_t gfp = __GFP_NOWARN | GFP_NOIO;
 	gfp_t gfp_comp = (gfp | __GFP_NORETRY | __GFP_COMP) & ~__GFP_RECLAIM;
-	int max_order = MIN(zfs_abd_scatter_max_order, MAX_ORDER - 1);
-	int nr_pages = abd_chunkcnt_for_bytes(size);
-	int chunks = 0, zones = 0;
+	unsigned int max_order = MIN(zfs_abd_scatter_max_order, MAX_ORDER - 1);
+	unsigned int nr_pages = abd_chunkcnt_for_bytes(size);
+	unsigned int chunks = 0, zones = 0;
 	size_t remaining_size;
 	int nid = NUMA_NO_NODE;
-	int alloc_pages = 0;
+	unsigned int alloc_pages = 0;
 
 	INIT_LIST_HEAD(&pages);
 
+	ASSERT3U(alloc_pages, <, nr_pages);
+
 	while (alloc_pages < nr_pages) {
-		unsigned chunk_pages;
-		int order;
+		unsigned int chunk_pages;
+		unsigned int order;
 
 		order = MIN(highbit64(nr_pages - alloc_pages) - 1, max_order);
 		chunk_pages = (1U << order);
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c
index 519f13212fac..dca48e1e4010 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ctldir.c
@@ -392,7 +392,20 @@ zfsctl_snapshot_unmount_delay_impl(zfs_snapentry_t *se, int delay)
 
 	zfsctl_snapshot_hold(se);
 	rw_enter(&se->se_taskqid_lock, RW_WRITER);
-	ASSERT3S(se->se_taskqid, ==, TASKQID_INVALID);
+	/*
+	 * If this condition happens, we managed to:
+	 * - dispatch once
+	 * - want to dispatch _again_ before it returned
+	 *
+	 * So let's just return - if that task fails at unmounting,
+	 * we'll eventually dispatch again, and if it succeeds,
+	 * no problem.
+	 */
+	if (se->se_taskqid != TASKQID_INVALID) {
+		rw_exit(&se->se_taskqid_lock);
+		zfsctl_snapshot_rele(se);
+		return;
+	}
 	se->se_taskqid = taskq_dispatch_delay(system_delay_taskq,
 	    snapentry_expire, se, TQ_SLEEP, ddi_get_lbolt() + delay * HZ);
 	rw_exit(&se->se_taskqid_lock);
@@ -485,7 +498,9 @@ zfsctl_inode_alloc(zfsvfs_t *zfsvfs, uint64_t id,
 	zp->z_atime_dirty = B_FALSE;
 	zp->z_zn_prefetch = B_FALSE;
 	zp->z_is_sa = B_FALSE;
+#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
 	zp->z_is_mapped = B_FALSE;
+#endif
 	zp->z_is_ctldir = B_TRUE;
 	zp->z_sa_hdl = NULL;
 	zp->z_blksz = 0;
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c
index f8d1777b07a6..f068f544f0ec 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_ioctl_os.c
@@ -135,7 +135,7 @@ zfsdev_ioctl(struct file *filp, unsigned cmd, unsigned long arg)
 
 	vecnum = cmd - ZFS_IOC_FIRST;
 
-	zc = kmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
+	zc = vmem_zalloc(sizeof (zfs_cmd_t), KM_SLEEP);
 
 	if (ddi_copyin((void *)(uintptr_t)arg, zc, sizeof (zfs_cmd_t), 0)) {
 		error = -SET_ERROR(EFAULT);
@@ -146,7 +146,7 @@ zfsdev_ioctl(struct file *filp, unsigned cmd, unsigned long arg)
 	if (error == 0 && rc != 0)
 		error = -SET_ERROR(EFAULT);
 out:
-	kmem_free(zc, sizeof (zfs_cmd_t));
+	vmem_free(zc, sizeof (zfs_cmd_t));
 	return (error);
 
 }
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c
index c921e587c75c..2d9b27a90884 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vfsops.c
@@ -608,7 +608,8 @@ zfs_get_temporary_prop(dsl_dataset_t *ds, zfs_prop_t zfs_prop, uint64_t *val,
 	}
 
 	if (tmp != *val) {
-		(void) strcpy(setpoint, "temporary");
+		if (setpoint)
+			(void) strcpy(setpoint, "temporary");
 		*val = tmp;
 	}
 	return (0);
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c
index 47f132a38abe..302a88c2d353 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_vnops_os.c
@@ -987,7 +987,7 @@ zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags)
 
 	mutex_enter(&zp->z_lock);
 	may_delete_now = atomic_read(&ZTOI(zp)->i_count) == 1 &&
-	    !(zp->z_is_mapped);
+	    !zn_has_cached_data(zp, 0, LLONG_MAX);
 	mutex_exit(&zp->z_lock);
 
 	/*
@@ -1075,7 +1075,8 @@ zfs_remove(znode_t *dzp, char *name, cred_t *cr, int flags)
 		    &xattr_obj_unlinked, sizeof (xattr_obj_unlinked));
 		delete_now = may_delete_now && !toobig &&
 		    atomic_read(&ZTOI(zp)->i_count) == 1 &&
-		    !(zp->z_is_mapped) && xattr_obj == xattr_obj_unlinked &&
+		    !zn_has_cached_data(zp, 0, LLONG_MAX) &&
+		    xattr_obj == xattr_obj_unlinked &&
 		    zfs_external_acl(zp) == acl_obj;
 	}
 
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c b/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c
index 1faf25d93cc7..7b802a9bace0 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zfs_znode.c
@@ -551,7 +551,9 @@ zfs_znode_alloc(zfsvfs_t *zfsvfs, dmu_buf_t *db, int blksz,
 	ASSERT3P(zp->z_xattr_cached, ==, NULL);
 	zp->z_unlinked = B_FALSE;
 	zp->z_atime_dirty = B_FALSE;
+#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
 	zp->z_is_mapped = B_FALSE;
+#endif
 	zp->z_is_ctldir = B_FALSE;
 	zp->z_suspended = B_FALSE;
 	zp->z_sa_hdl = NULL;
@@ -1641,7 +1643,7 @@ zfs_free_range(znode_t *zp, uint64_t off, uint64_t len)
 	 * Zero partial page cache entries.  This must be done under a
 	 * range lock in order to keep the ARC and page cache in sync.
 	 */
-	if (zp->z_is_mapped) {
+	if (zn_has_cached_data(zp, off, off + len - 1)) {
 		loff_t first_page, last_page, page_len;
 		loff_t first_page_offset, last_page_offset;
 
diff --git a/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c b/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c
index c56e3691e70a..e42b15042a3c 100644
--- a/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c
+++ b/sys/contrib/openzfs/module/os/linux/zfs/zpl_file.c
@@ -625,7 +625,6 @@ static int
 zpl_mmap(struct file *filp, struct vm_area_struct *vma)
 {
 	struct inode *ip = filp->f_mapping->host;
-	znode_t *zp = ITOZ(ip);
 	int error;
 	fstrans_cookie_t cookie;
 
@@ -640,9 +639,12 @@ zpl_mmap(struct file *filp, struct vm_area_struct *vma)
 	if (error)
 		return (error);
 
+#if !defined(HAVE_FILEMAP_RANGE_HAS_PAGE)
+	znode_t *zp = ITOZ(ip);
 	mutex_enter(&zp->z_lock);
 	zp->z_is_mapped = B_TRUE;
 	mutex_exit(&zp->z_lock);
+#endif
 
 	return (error);
 }
@@ -937,7 +939,7 @@ zpl_fadvise(struct file *filp, loff_t offset, loff_t len, int advice)
 	case POSIX_FADV_SEQUENTIAL:
 	case POSIX_FADV_WILLNEED:
 #ifdef HAVE_GENERIC_FADVISE
-		if (zn_has_cached_data(zp))
+		if (zn_has_cached_data(zp, offset, offset + len - 1))
 			error = generic_fadvise(filp, offset, len, advice);
 #endif
 		/*
diff --git a/sys/contrib/openzfs/module/zfs/arc.c b/sys/contrib/openzfs/module/zfs/arc.c
index 2a52d0d24572..aa806706de29 100644
--- a/sys/contrib/openzfs/module/zfs/arc.c
+++ b/sys/contrib/openzfs/module/zfs/arc.c
@@ -5958,6 +5958,7 @@ arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
 	    (zio_flags & ZIO_FLAG_RAW_ENCRYPT) != 0;
 	boolean_t embedded_bp = !!BP_IS_EMBEDDED(bp);
 	boolean_t no_buf = *arc_flags & ARC_FLAG_NO_BUF;
+	arc_buf_t *buf = NULL;
 	int rc = 0;
 
 	ASSERT(!embedded_bp ||
@@ -5987,7 +5988,7 @@ arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
 	if (!zfs_blkptr_verify(spa, bp, zio_flags & ZIO_FLAG_CONFIG_WRITER,
 	    BLK_VERIFY_LOG)) {
 		rc = SET_ERROR(ECKSUM);
-		goto out;
+		goto done;
 	}
 
 	if (!embedded_bp) {
@@ -6008,14 +6009,13 @@ arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
 	if (hdr != NULL && HDR_HAS_L1HDR(hdr) && (HDR_HAS_RABD(hdr) ||
 	    (hdr->b_l1hdr.b_pabd != NULL && !encrypted_read))) {
 		boolean_t is_data = !HDR_ISTYPE_METADATA(hdr);
-		arc_buf_t *buf = NULL;
 
 		if (HDR_IO_IN_PROGRESS(hdr)) {
 			if (*arc_flags & ARC_FLAG_CACHED_ONLY) {
 				mutex_exit(hash_lock);
 				ARCSTAT_BUMP(arcstat_cached_only_in_progress);
 				rc = SET_ERROR(ENOENT);
-				goto out;
+				goto done;
 			}
 
 			zio_t *head_zio = hdr->b_l1hdr.b_acb->acb_zio_head;
@@ -6144,9 +6144,7 @@ arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
 		ARCSTAT_CONDSTAT(!(*arc_flags & ARC_FLAG_PREFETCH),
 		    demand, prefetch, is_data, data, metadata, hits);
 		*arc_flags |= ARC_FLAG_CACHED;
-
-		if (done)
-			done(NULL, zb, bp, buf, private);
+		goto done;
 	} else {
 		uint64_t lsize = BP_GET_LSIZE(bp);
 		uint64_t psize = BP_GET_PSIZE(bp);
@@ -6159,10 +6157,10 @@ arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
 		int alloc_flags = encrypted_read ? ARC_HDR_ALLOC_RDATA : 0;
 
 		if (*arc_flags & ARC_FLAG_CACHED_ONLY) {
-			rc = SET_ERROR(ENOENT);
 			if (hash_lock != NULL)
 				mutex_exit(hash_lock);
-			goto out;
+			rc = SET_ERROR(ENOENT);
+			goto done;
 		}
 
 		if (hdr == NULL) {
@@ -6482,6 +6480,16 @@ arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
 		spa_read_history_add(spa, zb, *arc_flags);
 	spl_fstrans_unmark(cookie);
 	return (rc);
+
+done:
+	if (done)
+		done(NULL, zb, bp, buf, private);
+	if (pio && rc != 0) {
+		zio_t *zio = zio_null(pio, spa, NULL, NULL, NULL, zio_flags);
+		zio->io_error = rc;
+		zio_nowait(zio);
+	}
+	goto out;
 }
 
 arc_prune_t *
diff --git a/sys/contrib/openzfs/module/zfs/bpobj.c b/sys/contrib/openzfs/module/zfs/bpobj.c
index f7fded56518b..fa99f5141d4e 100644
--- a/sys/contrib/openzfs/module/zfs/bpobj.c
+++ b/sys/contrib/openzfs/module/zfs/bpobj.c
@@ -663,14 +663,13 @@ bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx)
 	}
 
 	VERIFY3U(0, ==, bpobj_open(&subbpo, bpo->bpo_os, subobj));
-	VERIFY3U(0, ==, bpobj_space(&subbpo, &used, &comp, &uncomp));
-
 	if (bpobj_is_empty(&subbpo)) {
 		/* No point in having an empty subobj. */
 		bpobj_close(&subbpo);
 		bpobj_free(bpo->bpo_os, subobj, tx);
 		return;
 	}
+	VERIFY3U(0, ==, bpobj_space(&subbpo, &used, &comp, &uncomp));
 
 	mutex_enter(&bpo->bpo_lock);
 	dmu_buf_will_dirty(bpo->bpo_dbuf, tx);
@@ -780,6 +779,68 @@ bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx)
 
 }
 
+/*
+ * Prefetch metadata required for bpobj_enqueue_subobj().
+ */
+void
+bpobj_prefetch_subobj(bpobj_t *bpo, uint64_t subobj)
+{
+	dmu_object_info_t doi;
+	bpobj_t subbpo;
+	uint64_t subsubobjs;
+	boolean_t copy_subsub = B_TRUE;
+	boolean_t copy_bps = B_TRUE;
+
+	ASSERT(bpobj_is_open(bpo));
+	ASSERT(subobj != 0);
+
+	if (subobj == dmu_objset_pool(bpo->bpo_os)->dp_empty_bpobj)
+		return;
+
+	if (bpobj_open(&subbpo, bpo->bpo_os, subobj) != 0)
+		return;
+	if (bpobj_is_empty(&subbpo)) {
+		bpobj_close(&subbpo);
+		return;
+	}
+	subsubobjs = subbpo.bpo_phys->bpo_subobjs;
+	bpobj_close(&subbpo);
+
+	if (subsubobjs != 0) {
+		if (dmu_object_info(bpo->bpo_os, subsubobjs, &doi) != 0)
+			return;
+		if (doi.doi_max_offset > doi.doi_data_block_size)
+			copy_subsub = B_FALSE;
+	}
+
+	if (dmu_object_info(bpo->bpo_os, subobj, &doi) != 0)
+		return;
+	if (doi.doi_max_offset > doi.doi_data_block_size || !copy_subsub)
+		copy_bps = B_FALSE;
+
+	if (copy_subsub && subsubobjs != 0) {
+		if (bpo->bpo_phys->bpo_subobjs) {
+			dmu_prefetch(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 0,
+			    bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 1,
+			    ZIO_PRIORITY_ASYNC_READ);
+		}
+		dmu_prefetch(bpo->bpo_os, subsubobjs, 0, 0, 1,
+		    ZIO_PRIORITY_ASYNC_READ);
+	}
+
+	if (copy_bps) {
+		dmu_prefetch(bpo->bpo_os, bpo->bpo_object, 0,
+		    bpo->bpo_phys->bpo_num_blkptrs * sizeof (blkptr_t), 1,
+		    ZIO_PRIORITY_ASYNC_READ);
+		dmu_prefetch(bpo->bpo_os, subobj, 0, 0, 1,
+		    ZIO_PRIORITY_ASYNC_READ);
+	} else if (bpo->bpo_phys->bpo_subobjs) {
+		dmu_prefetch(bpo->bpo_os, bpo->bpo_phys->bpo_subobjs, 0,
+		    bpo->bpo_phys->bpo_num_subobjs * sizeof (subobj), 1,
+		    ZIO_PRIORITY_ASYNC_READ);
+	}
+}
+
 void
 bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, boolean_t bp_freed,
     dmu_tx_t *tx)
diff --git a/sys/contrib/openzfs/module/zfs/dmu_send.c b/sys/contrib/openzfs/module/zfs/dmu_send.c
index 7f8de23f0e29..f86a0a5b1c57 100644
--- a/sys/contrib/openzfs/module/zfs/dmu_send.c
+++ b/sys/contrib/openzfs/module/zfs/dmu_send.c
@@ -493,6 +493,7 @@ dmu_dump_write(dmu_send_cookie_t *dscp, dmu_object_type_t type, uint64_t object,
 	    (bp != NULL ? BP_GET_COMPRESS(bp) != ZIO_COMPRESS_OFF &&
 	    io_compressed : lsize != psize);
 	if (raw || compressed) {
+		ASSERT(bp != NULL);
 		ASSERT(raw || dscp->dsc_featureflags &
 		    DMU_BACKUP_FEATURE_COMPRESSED);
 		ASSERT(!BP_IS_EMBEDDED(bp));
@@ -3028,8 +3029,7 @@ dmu_send_estimate_fast(dsl_dataset_t *origds, dsl_dataset_t *fromds,
 
 		dsl_dataset_name(origds, dsname);
 		(void) strcat(dsname, "/");
-		(void) strlcat(dsname, recv_clone_name,
-		    sizeof (dsname) - strlen(dsname));
+		(void) strlcat(dsname, recv_clone_name, sizeof (dsname));
 
 		err = dsl_dataset_hold(origds->ds_dir->dd_pool,
 		    dsname, FTAG, &ds);
diff --git a/sys/contrib/openzfs/module/zfs/dsl_dataset.c b/sys/contrib/openzfs/module/zfs/dsl_dataset.c
index 57a58f88cec5..0584a356f9ac 100644
--- a/sys/contrib/openzfs/module/zfs/dsl_dataset.c
+++ b/sys/contrib/openzfs/module/zfs/dsl_dataset.c
@@ -1039,7 +1039,7 @@ dsl_dataset_has_owner(dsl_dataset_t *ds)
 	return (rv);
 }
 
-static boolean_t
+boolean_t
 zfeature_active(spa_feature_t f, void *arg)
 {
 	switch (spa_feature_table[f].fi_type) {
@@ -2121,16 +2121,6 @@ dsl_dataset_sync(dsl_dataset_t *ds, zio_t *zio, dmu_tx_t *tx)
 	}
 
 	dmu_objset_sync(ds->ds_objset, zio, tx);
-
-	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
-		if (zfeature_active(f, ds->ds_feature_activation[f])) {
-			if (zfeature_active(f, ds->ds_feature[f]))
-				continue;
-			dsl_dataset_activate_feature(ds->ds_object, f,
-			    ds->ds_feature_activation[f], tx);
-			ds->ds_feature[f] = ds->ds_feature_activation[f];
-		}
-	}
 }
 
 /*
@@ -2303,6 +2293,17 @@ dsl_dataset_sync_done(dsl_dataset_t *ds, dmu_tx_t *tx)
 	ASSERT(!dmu_objset_is_dirty(os, dmu_tx_get_txg(tx)));
 
 	dmu_buf_rele(ds->ds_dbuf, ds);
+
+	for (spa_feature_t f = 0; f < SPA_FEATURES; f++) {
+		if (zfeature_active(f,
+		    ds->ds_feature_activation[f])) {
+			if (zfeature_active(f, ds->ds_feature[f]))
+				continue;
+			dsl_dataset_activate_feature(ds->ds_object, f,
+			    ds->ds_feature_activation[f], tx);
+			ds->ds_feature[f] = ds->ds_feature_activation[f];
+		}
+	}
 }
 
 int
diff --git a/sys/contrib/openzfs/module/zfs/dsl_deadlist.c b/sys/contrib/openzfs/module/zfs/dsl_deadlist.c
index 2b33446e66af..d58820701f60 100644
--- a/sys/contrib/openzfs/module/zfs/dsl_deadlist.c
+++ b/sys/contrib/openzfs/module/zfs/dsl_deadlist.c
@@ -438,6 +438,18 @@ dle_enqueue_subobj(dsl_deadlist_t *dl, dsl_deadlist_entry_t *dle,
 	}
 }
 
+/*
+ * Prefetch metadata required for dle_enqueue_subobj().
+ */
+static void
+dle_prefetch_subobj(dsl_deadlist_t *dl, dsl_deadlist_entry_t *dle,
+    uint64_t obj)
+{
+	if (dle->dle_bpobj.bpo_object !=
+	    dmu_objset_pool(dl->dl_os)->dp_empty_bpobj)
+		bpobj_prefetch_subobj(&dle->dle_bpobj, obj);
+}
+
 void
 dsl_deadlist_insert(dsl_deadlist_t *dl, const blkptr_t *bp, boolean_t bp_freed,
     dmu_tx_t *tx)
@@ -810,6 +822,27 @@ dsl_deadlist_insert_bpobj(dsl_deadlist_t *dl, uint64_t obj, uint64_t birth,
 	dle_enqueue_subobj(dl, dle, obj, tx);
 }
 
+/*
+ * Prefetch metadata required for dsl_deadlist_insert_bpobj().
+ */
+static void
+dsl_deadlist_prefetch_bpobj(dsl_deadlist_t *dl, uint64_t obj, uint64_t birth)
+{
+	dsl_deadlist_entry_t dle_tofind;
+	dsl_deadlist_entry_t *dle;
+	avl_index_t where;
+
+	ASSERT(MUTEX_HELD(&dl->dl_lock));
+
+	dsl_deadlist_load_tree(dl);
+
+	dle_tofind.dle_mintxg = birth;
+	dle = avl_find(&dl->dl_tree, &dle_tofind, &where);
+	if (dle == NULL)
+		dle = avl_nearest(&dl->dl_tree, where, AVL_BEFORE);
+	dle_prefetch_subobj(dl, dle, obj);
+}
+
 static int
 dsl_deadlist_insert_cb(void *arg, const blkptr_t *bp, boolean_t bp_freed,
     dmu_tx_t *tx)
@@ -826,12 +859,12 @@ dsl_deadlist_insert_cb(void *arg, const blkptr_t *bp, boolean_t bp_freed,
 void
 dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx)
 {
-	zap_cursor_t zc;
-	zap_attribute_t za;
+	zap_cursor_t zc, pzc;
+	zap_attribute_t za, pza;
 	dmu_buf_t *bonus;
 	dsl_deadlist_phys_t *dlp;
 	dmu_object_info_t doi;
-	int error;
+	int error, perror, i;
 
 	VERIFY0(dmu_object_info(dl->dl_os, obj, &doi));
 	if (doi.doi_type == DMU_OT_BPOBJ) {
@@ -843,15 +876,32 @@ dsl_deadlist_merge(dsl_deadlist_t *dl, uint64_t obj, dmu_tx_t *tx)
 	}
 
 	mutex_enter(&dl->dl_lock);
+	/*
+	 * Prefetch up to 128 deadlists first and then more as we progress.
+	 * The limit is a balance between ARC use and diminishing returns.
+	 */
+	for (zap_cursor_init(&pzc, dl->dl_os, obj), i = 0;
+	    (perror = zap_cursor_retrieve(&pzc, &pza)) == 0 && i < 128;
+	    zap_cursor_advance(&pzc), i++) {
+		dsl_deadlist_prefetch_bpobj(dl, pza.za_first_integer,
+		    zfs_strtonum(pza.za_name, NULL));
+	}
 	for (zap_cursor_init(&zc, dl->dl_os, obj);
 	    (error = zap_cursor_retrieve(&zc, &za)) == 0;
 	    zap_cursor_advance(&zc)) {
 		uint64_t mintxg = zfs_strtonum(za.za_name, NULL);
 		dsl_deadlist_insert_bpobj(dl, za.za_first_integer, mintxg, tx);
 		VERIFY0(zap_remove_int(dl->dl_os, obj, mintxg, tx));
+		if (perror == 0) {
+			dsl_deadlist_prefetch_bpobj(dl, pza.za_first_integer,
+			    zfs_strtonum(pza.za_name, NULL));
+			zap_cursor_advance(&pzc);
+			perror = zap_cursor_retrieve(&pzc, &pza);
+		}
 	}
 	VERIFY3U(error, ==, ENOENT);
 	zap_cursor_fini(&zc);
+	zap_cursor_fini(&pzc);
 
 	VERIFY0(dmu_bonus_hold(dl->dl_os, obj, FTAG, &bonus));
 	dlp = bonus->db_data;
@@ -869,8 +919,9 @@ dsl_deadlist_move_bpobj(dsl_deadlist_t *dl, bpobj_t *bpo, uint64_t mintxg,
     dmu_tx_t *tx)
 {
 	dsl_deadlist_entry_t dle_tofind;
-	dsl_deadlist_entry_t *dle;
+	dsl_deadlist_entry_t *dle, *pdle;
 	avl_index_t where;
+	int i;
 
 	ASSERT(!dl->dl_oldfmt);
 
@@ -882,11 +933,23 @@ dsl_deadlist_move_bpobj(dsl_deadlist_t *dl, bpobj_t *bpo, uint64_t mintxg,
 	dle = avl_find(&dl->dl_tree, &dle_tofind, &where);
 	if (dle == NULL)
 		dle = avl_nearest(&dl->dl_tree, where, AVL_AFTER);
+	/*
+	 * Prefetch up to 128 deadlists first and then more as we progress.
+	 * The limit is a balance between ARC use and diminishing returns.
+	 */
+	for (pdle = dle, i = 0; pdle && i < 128; ) {
+		bpobj_prefetch_subobj(bpo, pdle->dle_bpobj.bpo_object);
+		pdle = AVL_NEXT(&dl->dl_tree, pdle);
+	}
 	while (dle) {
 		uint64_t used, comp, uncomp;
 		dsl_deadlist_entry_t *dle_next;
 
 		bpobj_enqueue_subobj(bpo, dle->dle_bpobj.bpo_object, tx);
+		if (pdle) {
+			bpobj_prefetch_subobj(bpo, pdle->dle_bpobj.bpo_object);
+			pdle = AVL_NEXT(&dl->dl_tree, pdle);
+		}
 
 		VERIFY0(bpobj_space(&dle->dle_bpobj,
 		    &used, &comp, &uncomp));
diff --git a/sys/contrib/openzfs/module/zfs/dsl_scan.c b/sys/contrib/openzfs/module/zfs/dsl_scan.c
index f9e437f0c947..f971aa211e0c 100644
--- a/sys/contrib/openzfs/module/zfs/dsl_scan.c
+++ b/sys/contrib/openzfs/module/zfs/dsl_scan.c
@@ -37,6 +37,7 @@
 #include <sys/dmu_tx.h>
 #include <sys/dmu_objset.h>
 #include <sys/arc.h>
+#include <sys/arc_impl.h>
 #include <sys/zap.h>
 #include <sys/zio.h>
 #include <sys/zfs_context.h>
@@ -126,11 +127,20 @@ static boolean_t scan_ds_queue_contains(dsl_scan_t *scn, uint64_t dsobj,
 static void scan_ds_queue_insert(dsl_scan_t *scn, uint64_t dsobj, uint64_t txg);
 static void scan_ds_queue_remove(dsl_scan_t *scn, uint64_t dsobj);
 static void scan_ds_queue_sync(dsl_scan_t *scn, dmu_tx_t *tx);
-static uint64_t dsl_scan_count_data_disks(vdev_t *vd);
+static uint64_t dsl_scan_count_data_disks(spa_t *spa);
 
 extern uint_t zfs_vdev_async_write_active_min_dirty_percent;
 static int zfs_scan_blkstats = 0;
 
+/*
+ * 'zpool status' uses bytes processed per pass to report throughput and
+ * estimate time remaining.  We define a pass to start when the scanning
+ * phase completes for a sequential resilver.  Optionally, this value
+ * may be used to reset the pass statistics every N txgs to provide an
+ * estimated completion time based on currently observed performance.
+ */
+static uint_t zfs_scan_report_txgs = 0;
+
 /*
  * By default zfs will check to ensure it is not over the hard memory
  * limit before each txg. If finer-grained control of this is needed
@@ -147,7 +157,7 @@ static int zfs_scan_strict_mem_lim = B_FALSE;
  * overload the drives with I/O, since that is protected by
  * zfs_vdev_scrub_max_active.
  */
-static uint64_t zfs_scan_vdev_limit = 4 << 20;
+static uint64_t zfs_scan_vdev_limit = 16 << 20;
 
 static uint_t zfs_scan_issue_strategy = 0;
 
@@ -466,11 +476,12 @@ dsl_scan_init(dsl_pool_t *dp, uint64_t txg)
 
 	/*
 	 * Calculate the max number of in-flight bytes for pool-wide
-	 * scanning operations (minimum 1MB). Limits for the issuing
-	 * phase are done per top-level vdev and are handled separately.
+	 * scanning operations (minimum 1MB, maximum 1/4 of arc_c_max).
+	 * Limits for the issuing phase are done per top-level vdev and
+	 * are handled separately.
 	 */
-	scn->scn_maxinflight_bytes = MAX(zfs_scan_vdev_limit *
-	    dsl_scan_count_data_disks(spa->spa_root_vdev), 1ULL << 20);
+	scn->scn_maxinflight_bytes = MIN(arc_c_max / 4, MAX(1ULL << 20,
+	    zfs_scan_vdev_limit * dsl_scan_count_data_disks(spa)));
 
 	avl_create(&scn->scn_queue, scan_ds_queue_compare, sizeof (scan_ds_t),
 	    offsetof(scan_ds_t, sds_node));
@@ -604,6 +615,8 @@ dsl_scan_init(dsl_pool_t *dp, uint64_t txg)
 	}
 
 	spa_scan_stat_init(spa);
+	vdev_scan_stat_init(spa->spa_root_vdev);
+
 	return (0);
 }
 
@@ -763,6 +776,7 @@ dsl_scan_setup_sync(void *arg, dmu_tx_t *tx)
 	scn->scn_last_checkpoint = 0;
 	scn->scn_checkpointing = B_FALSE;
 	spa_scan_stat_init(spa);
+	vdev_scan_stat_init(spa->spa_root_vdev);
 
 	if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
 		scn->scn_phys.scn_ddt_class_max = zfs_scrub_ddt_class_max;
@@ -2024,6 +2038,26 @@ dsl_scan_visitbp(blkptr_t *bp, const zbookmark_phys_t *zb,
 		return;
 	}
 
+	/*
+	 * Check if this block contradicts any filesystem flags.
+	 */
+	spa_feature_t f = SPA_FEATURE_LARGE_BLOCKS;
+	if (BP_GET_LSIZE(bp) > SPA_OLD_MAXBLOCKSIZE)
+		ASSERT(dsl_dataset_feature_is_active(ds, f));
+
+	f = zio_checksum_to_feature(BP_GET_CHECKSUM(bp));
+	if (f != SPA_FEATURE_NONE)
+		ASSERT(dsl_dataset_feature_is_active(ds, f));
+
+	f = zio_compress_to_feature(BP_GET_COMPRESS(bp));
+	if (f != SPA_FEATURE_NONE)
+		ASSERT(dsl_dataset_feature_is_active(ds, f));
+
+	if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg) {
+		scn->scn_lt_min_this_txg++;
+		return;
+	}
+
 	if (bp->blk_birth <= scn->scn_phys.scn_cur_min_txg) {
 		scn->scn_lt_min_this_txg++;
 		return;
@@ -2811,8 +2845,9 @@ dsl_scan_visit(dsl_scan_t *scn, dmu_tx_t *tx)
 }
 
 static uint64_t
-dsl_scan_count_data_disks(vdev_t *rvd)
+dsl_scan_count_data_disks(spa_t *spa)
 {
+	vdev_t *rvd = spa->spa_root_vdev;
 	uint64_t i, leaves = 0;
 
 	for (i = 0; i < rvd->vdev_children; i++) {
@@ -3652,6 +3687,16 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 		return;
 	}
 
+	/*
+	 * Disabled by default, set zfs_scan_report_txgs to report
+	 * average performance over the last zfs_scan_report_txgs TXGs.
+	 */
+	if (!dsl_scan_is_paused_scrub(scn) && zfs_scan_report_txgs != 0 &&
+	    tx->tx_txg % zfs_scan_report_txgs == 0) {
+		scn->scn_issued_before_pass += spa->spa_scan_pass_issued;
+		spa_scan_stat_init(spa);
+	}
+
 	/*
 	 * It is possible to switch from unsorted to sorted at any time,
 	 * but afterwards the scan will remain sorted unless reloaded from
@@ -3711,12 +3756,13 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 		taskqid_t prefetch_tqid;
 
 		/*
-		 * Recalculate the max number of in-flight bytes for pool-wide
-		 * scanning operations (minimum 1MB). Limits for the issuing
-		 * phase are done per top-level vdev and are handled separately.
+		 * Calculate the max number of in-flight bytes for pool-wide
+		 * scanning operations (minimum 1MB, maximum 1/4 of arc_c_max).
+		 * Limits for the issuing phase are done per top-level vdev and
+		 * are handled separately.
 		 */
-		scn->scn_maxinflight_bytes = MAX(zfs_scan_vdev_limit *
-		    dsl_scan_count_data_disks(spa->spa_root_vdev), 1ULL << 20);
+		scn->scn_maxinflight_bytes = MIN(arc_c_max / 4, MAX(1ULL << 20,
+		    zfs_scan_vdev_limit * dsl_scan_count_data_disks(spa)));
 
 		if (scnp->scn_ddt_bookmark.ddb_class <=
 		    scnp->scn_ddt_class_max) {
@@ -3780,6 +3826,9 @@ dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
 			if (scn->scn_is_sorted) {
 				scn->scn_checkpointing = B_TRUE;
 				scn->scn_clearing = B_TRUE;
+				scn->scn_issued_before_pass +=
+				    spa->spa_scan_pass_issued;
+				spa_scan_stat_init(spa);
 			}
 			zfs_dbgmsg("scan complete for %s txg %llu",
 			    spa->spa_name,
@@ -4507,5 +4556,8 @@ ZFS_MODULE_PARAM(zfs, zfs_, scan_strict_mem_lim, INT, ZMOD_RW,
 ZFS_MODULE_PARAM(zfs, zfs_, scan_fill_weight, UINT, ZMOD_RW,
 	"Tunable to adjust bias towards more filled segments during scans");
 
+ZFS_MODULE_PARAM(zfs, zfs_, scan_report_txgs, UINT, ZMOD_RW,
+	"Tunable to report resilver performance over the last N txgs");
+
 ZFS_MODULE_PARAM(zfs, zfs_, resilver_disable_defer, INT, ZMOD_RW,
 	"Process all resilvers immediately");
diff --git a/sys/contrib/openzfs/module/zfs/spa.c b/sys/contrib/openzfs/module/zfs/spa.c
index 67b3a03a951a..bbb83fc610b1 100644
--- a/sys/contrib/openzfs/module/zfs/spa.c
+++ b/sys/contrib/openzfs/module/zfs/spa.c
@@ -1714,9 +1714,9 @@ spa_unload(spa_t *spa)
 	 */
 	spa_l2cache_drop(spa);
 
-	for (int i = 0; i < spa->spa_spares.sav_count; i++)
-		vdev_free(spa->spa_spares.sav_vdevs[i]);
 	if (spa->spa_spares.sav_vdevs) {
+		for (int i = 0; i < spa->spa_spares.sav_count; i++)
+			vdev_free(spa->spa_spares.sav_vdevs[i]);
 		kmem_free(spa->spa_spares.sav_vdevs,
 		    spa->spa_spares.sav_count * sizeof (void *));
 		spa->spa_spares.sav_vdevs = NULL;
@@ -1727,11 +1727,11 @@ spa_unload(spa_t *spa)
 	}
 	spa->spa_spares.sav_count = 0;
 
-	for (int i = 0; i < spa->spa_l2cache.sav_count; i++) {
-		vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]);
-		vdev_free(spa->spa_l2cache.sav_vdevs[i]);
-	}
 	if (spa->spa_l2cache.sav_vdevs) {
+		for (int i = 0; i < spa->spa_l2cache.sav_count; i++) {
+			vdev_clear_stats(spa->spa_l2cache.sav_vdevs[i]);
+			vdev_free(spa->spa_l2cache.sav_vdevs[i]);
+		}
 		kmem_free(spa->spa_l2cache.sav_vdevs,
 		    spa->spa_l2cache.sav_count * sizeof (void *));
 		spa->spa_l2cache.sav_vdevs = NULL;
@@ -1789,20 +1789,21 @@ spa_load_spares(spa_t *spa)
 	/*
 	 * First, close and free any existing spare vdevs.
 	 */
-	for (i = 0; i < spa->spa_spares.sav_count; i++) {
-		vd = spa->spa_spares.sav_vdevs[i];
+	if (spa->spa_spares.sav_vdevs) {
+		for (i = 0; i < spa->spa_spares.sav_count; i++) {
+			vd = spa->spa_spares.sav_vdevs[i];
 
-		/* Undo the call to spa_activate() below */
-		if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
-		    B_FALSE)) != NULL && tvd->vdev_isspare)
-			spa_spare_remove(tvd);
-		vdev_close(vd);
-		vdev_free(vd);
-	}
+			/* Undo the call to spa_activate() below */
+			if ((tvd = spa_lookup_by_guid(spa, vd->vdev_guid,
+			    B_FALSE)) != NULL && tvd->vdev_isspare)
+				spa_spare_remove(tvd);
+			vdev_close(vd);
+			vdev_free(vd);
+		}
 
-	if (spa->spa_spares.sav_vdevs)
 		kmem_free(spa->spa_spares.sav_vdevs,
 		    spa->spa_spares.sav_count * sizeof (void *));
+	}
 
 	if (spa->spa_spares.sav_config == NULL)
 		nspares = 0;
@@ -2013,23 +2014,24 @@ spa_load_l2cache(spa_t *spa)
 	/*
 	 * Purge vdevs that were dropped
 	 */
-	for (i = 0; i < oldnvdevs; i++) {
-		uint64_t pool;
+	if (oldvdevs) {
+		for (i = 0; i < oldnvdevs; i++) {
+			uint64_t pool;
 
-		vd = oldvdevs[i];
-		if (vd != NULL) {
-			ASSERT(vd->vdev_isl2cache);
+			vd = oldvdevs[i];
+			if (vd != NULL) {
+				ASSERT(vd->vdev_isl2cache);
 
-			if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
-			    pool != 0ULL && l2arc_vdev_present(vd))
-				l2arc_remove_vdev(vd);
-			vdev_clear_stats(vd);
-			vdev_free(vd);
+				if (spa_l2cache_exists(vd->vdev_guid, &pool) &&
+				    pool != 0ULL && l2arc_vdev_present(vd))
+					l2arc_remove_vdev(vd);
+				vdev_clear_stats(vd);
+				vdev_free(vd);
+			}
 		}
-	}
 
-	if (oldvdevs)
 		kmem_free(oldvdevs, oldnvdevs * sizeof (void *));
+	}
 
 	for (i = 0; i < sav->sav_count; i++)
 		nvlist_free(l2cache[i]);
diff --git a/sys/contrib/openzfs/module/zfs/spa_misc.c b/sys/contrib/openzfs/module/zfs/spa_misc.c
index 822fd0ee89b6..53763e915ca8 100644
--- a/sys/contrib/openzfs/module/zfs/spa_misc.c
+++ b/sys/contrib/openzfs/module/zfs/spa_misc.c
@@ -2556,7 +2556,6 @@ spa_scan_stat_init(spa_t *spa)
 	spa->spa_scan_pass_scrub_spent_paused = 0;
 	spa->spa_scan_pass_exam = 0;
 	spa->spa_scan_pass_issued = 0;
-	vdev_scan_stat_init(spa->spa_root_vdev);
 }
 
 /*
diff --git a/sys/contrib/openzfs/module/zfs/vdev_rebuild.c b/sys/contrib/openzfs/module/zfs/vdev_rebuild.c
index 1f56275c853b..62aa61b3b9e7 100644
--- a/sys/contrib/openzfs/module/zfs/vdev_rebuild.c
+++ b/sys/contrib/openzfs/module/zfs/vdev_rebuild.c
@@ -34,6 +34,7 @@
 #include <sys/zio.h>
 #include <sys/dmu_tx.h>
 #include <sys/arc.h>
+#include <sys/arc_impl.h>
 #include <sys/zap.h>
 
 /*
@@ -116,13 +117,12 @@ static uint64_t zfs_rebuild_max_segment = 1024 * 1024;
  * segment size is also large (zfs_rebuild_max_segment=1M).  This helps keep
  * the queue depth short.
  *
- * 32MB was selected as the default value to achieve good performance with
- * a large 90-drive dRAID HDD configuration (draid2:8d:90c:2s). A sequential
- * rebuild was unable to saturate all of the drives using smaller values.
- * With a value of 32MB the sequential resilver write rate was measured at
- * 800MB/s sustained while rebuilding to a distributed spare.
+ * 64MB was observed to deliver the best performance and set as the default.
+ * Testing was performed with a 106-drive dRAID HDD pool (draid2:11d:106c)
+ * and a rebuild rate of 1.2GB/s was measured to the distribute spare.
+ * Smaller values were unable to fully saturate the available pool I/O.
  */
-static uint64_t zfs_rebuild_vdev_limit = 32 << 20;
+static uint64_t zfs_rebuild_vdev_limit = 64 << 20;
 
 /*
  * Automatically start a pool scrub when the last active sequential resilver
@@ -754,6 +754,7 @@ vdev_rebuild_thread(void *arg)
 {
 	vdev_t *vd = arg;
 	spa_t *spa = vd->vdev_spa;
+	vdev_t *rvd = spa->spa_root_vdev;
 	int error = 0;
 
 	/*
@@ -786,9 +787,6 @@ vdev_rebuild_thread(void *arg)
 	vr->vr_pass_bytes_scanned = 0;
 	vr->vr_pass_bytes_issued = 0;
 
-	vr->vr_bytes_inflight_max = MAX(1ULL << 20,
-	    zfs_rebuild_vdev_limit * vd->vdev_children);
-
 	uint64_t update_est_time = gethrtime();
 	vdev_rebuild_update_bytes_est(vd, 0);
 
@@ -804,6 +802,17 @@ vdev_rebuild_thread(void *arg)
 		metaslab_t *msp = vd->vdev_ms[i];
 		vr->vr_scan_msp = msp;
 
+		/*
+		 * Calculate the max number of in-flight bytes for top-level
+		 * vdev scanning operations (minimum 1MB, maximum 1/4 of
+		 * arc_c_max shared by all top-level vdevs).  Limits for the
+		 * issuing phase are done per top-level vdev and are handled
+		 * separately.
+		 */
+		uint64_t limit = (arc_c_max / 4) / MAX(rvd->vdev_children, 1);
+		vr->vr_bytes_inflight_max = MIN(limit, MAX(1ULL << 20,
+		    zfs_rebuild_vdev_limit * vd->vdev_children));
+
 		/*
 		 * Removal of vdevs from the vdev tree may eliminate the need
 		 * for the rebuild, in which case it should be canceled.  The
diff --git a/sys/contrib/openzfs/module/zfs/zfs_replay.c b/sys/contrib/openzfs/module/zfs/zfs_replay.c
index 0293e46d5858..32be27a8ba6e 100644
--- a/sys/contrib/openzfs/module/zfs/zfs_replay.c
+++ b/sys/contrib/openzfs/module/zfs/zfs_replay.c
@@ -512,9 +512,9 @@ zfs_replay_create(void *arg1, void *arg2, boolean_t byteswap)
 	 *
 	 * The _ATTR versions will grab the fuid info in their subcases.
 	 */
-	if ((int)lr->lr_common.lrc_txtype != TX_SYMLINK &&
-	    (int)lr->lr_common.lrc_txtype != TX_MKDIR_ATTR &&
-	    (int)lr->lr_common.lrc_txtype != TX_CREATE_ATTR) {
+	if (txtype != TX_SYMLINK &&
+	    txtype != TX_MKDIR_ATTR &&
+	    txtype != TX_CREATE_ATTR) {
 		start = (lr + 1);
 		zfsvfs->z_fuid_replay =
 		    zfs_replay_fuid_domain(start, &start,
diff --git a/sys/contrib/openzfs/module/zfs/zfs_vnops.c b/sys/contrib/openzfs/module/zfs/zfs_vnops.c
index 0c392b9da0fb..10677d8d9947 100644
--- a/sys/contrib/openzfs/module/zfs/zfs_vnops.c
+++ b/sys/contrib/openzfs/module/zfs/zfs_vnops.c
@@ -106,7 +106,7 @@ zfs_holey_common(znode_t *zp, ulong_t cmd, loff_t *off)
 		hole = B_FALSE;
 
 	/* Flush any mmap()'d data to disk */
-	if (zn_has_cached_data(zp))
+	if (zn_has_cached_data(zp, 0, file_sz - 1))
 		zn_flush_cached_data(zp, B_FALSE);
 
 	lr = zfs_rangelock_enter(&zp->z_rangelock, 0, file_sz, RL_READER);
@@ -288,7 +288,8 @@ zfs_read(struct znode *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
 			error = mappedread_sf(zp, nbytes, uio);
 		else
 #endif
-		if (zn_has_cached_data(zp) && !(ioflag & O_DIRECT)) {
+		if (zn_has_cached_data(zp, zfs_uio_offset(uio),
+		    zfs_uio_offset(uio) + nbytes - 1) && !(ioflag & O_DIRECT)) {
 			error = mappedread(zp, nbytes, uio);
 		} else {
 			error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl),
@@ -696,7 +697,8 @@ zfs_write(znode_t *zp, zfs_uio_t *uio, int ioflag, cred_t *cr)
 			zfs_uioskip(uio, nbytes);
 			tx_bytes = nbytes;
 		}
-		if (tx_bytes && zn_has_cached_data(zp) &&
+		if (tx_bytes &&
+		    zn_has_cached_data(zp, woff, woff + tx_bytes - 1) &&
 		    !(ioflag & O_DIRECT)) {
 			update_pages(zp, woff, tx_bytes, zfsvfs->z_os);
 		}
diff --git a/sys/contrib/openzfs/module/zfs/zio.c b/sys/contrib/openzfs/module/zfs/zio.c
index 5d7ed6d582a2..d888a584a93c 100644
--- a/sys/contrib/openzfs/module/zfs/zio.c
+++ b/sys/contrib/openzfs/module/zfs/zio.c
@@ -2778,7 +2778,7 @@ zio_write_gang_member_ready(zio_t *zio)
 	ASSERT3U(zio->io_prop.zp_copies, ==, gio->io_prop.zp_copies);
 	ASSERT3U(zio->io_prop.zp_copies, <=, BP_GET_NDVAS(zio->io_bp));
 	ASSERT3U(pio->io_prop.zp_copies, <=, BP_GET_NDVAS(pio->io_bp));
-	ASSERT3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp));
+	VERIFY3U(BP_GET_NDVAS(zio->io_bp), <=, BP_GET_NDVAS(pio->io_bp));
 
 	mutex_enter(&pio->io_lock);
 	for (int d = 0; d < BP_GET_NDVAS(zio->io_bp); d++) {
@@ -2816,18 +2816,20 @@ zio_write_gang_block(zio_t *pio, metaslab_class_t *mc)
 	uint64_t resid = pio->io_size;
 	uint64_t lsize;
 	int copies = gio->io_prop.zp_copies;
-	int gbh_copies;
 	zio_prop_t zp;
 	int error;
 	boolean_t has_data = !(pio->io_flags & ZIO_FLAG_NODATA);
 
 	/*
-	 * encrypted blocks need DVA[2] free so encrypted gang headers can't
-	 * have a third copy.
+	 * If one copy was requested, store 2 copies of the GBH, so that we
+	 * can still traverse all the data (e.g. to free or scrub) even if a
+	 * block is damaged.  Note that we can't store 3 copies of the GBH in
+	 * all cases, e.g. with encryption, which uses DVA[2] for the IV+salt.
 	 */
-	gbh_copies = MIN(copies + 1, spa_max_replication(spa));
-	if (BP_IS_ENCRYPTED(bp) && gbh_copies >= SPA_DVAS_PER_BP)
-		gbh_copies = SPA_DVAS_PER_BP - 1;
+	int gbh_copies = copies;
+	if (gbh_copies == 1) {
+		gbh_copies = MIN(2, spa_max_replication(spa));
+	}
 
 	int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER;
 	if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
diff --git a/sys/contrib/openzfs/module/zstd/lib/compress/zstd_double_fast.c b/sys/contrib/openzfs/module/zstd/lib/compress/zstd_double_fast.c
index 27eed66cfedd..4a95c01a090d 100644
--- a/sys/contrib/openzfs/module/zstd/lib/compress/zstd_double_fast.c
+++ b/sys/contrib/openzfs/module/zstd/lib/compress/zstd_double_fast.c
@@ -409,7 +409,7 @@ static size_t ZSTD_compressBlock_doubleFast_extDict_generic(
         hashSmall[hSmall] = hashLong[hLong] = current;   /* update hash table */
 
         if ((((U32)((prefixStartIndex-1) - repIndex) >= 3) /* intentional underflow : ensure repIndex doesn't overlap dict + prefix */
-            & (repIndex > dictStartIndex))
+            & (offset_1 < current+1 - dictStartIndex)) /* note: we are searching at current+1 */
           && (MEM_read32(repMatch) == MEM_read32(ip+1)) ) {
             const BYTE* repMatchEnd = repIndex < prefixStartIndex ? dictEnd : iend;
             mLength = ZSTD_count_2segments(ip+1+4, repMatch+4, iend, repMatchEnd, prefixStart) + 4;
@@ -477,7 +477,7 @@ static size_t ZSTD_compressBlock_doubleFast_extDict_generic(
                 U32 const repIndex2 = current2 - offset_2;
                 const BYTE* repMatch2 = repIndex2 < prefixStartIndex ? dictBase + repIndex2 : base + repIndex2;
                 if ( (((U32)((prefixStartIndex-1) - repIndex2) >= 3)   /* intentional overflow : ensure repIndex2 doesn't overlap dict + prefix */
-                    & (repIndex2 > dictStartIndex))
+                    & (offset_2 < current2 - dictStartIndex))
                   && (MEM_read32(repMatch2) == MEM_read32(ip)) ) {
                     const BYTE* const repEnd2 = repIndex2 < prefixStartIndex ? dictEnd : iend;
                     size_t const repLength2 = ZSTD_count_2segments(ip+4, repMatch2+4, iend, repEnd2, prefixStart) + 4;
diff --git a/sys/contrib/openzfs/module/zstd/lib/compress/zstd_fast.c b/sys/contrib/openzfs/module/zstd/lib/compress/zstd_fast.c
index 85a3a7a91e49..17894b85472f 100644
--- a/sys/contrib/openzfs/module/zstd/lib/compress/zstd_fast.c
+++ b/sys/contrib/openzfs/module/zstd/lib/compress/zstd_fast.c
@@ -416,9 +416,9 @@ static size_t ZSTD_compressBlock_fast_extDict_generic(
         const BYTE* const repMatch = repBase + repIndex;
         hashTable[h] = current;   /* update hash table */
         DEBUGLOG(7, "offset_1 = %u , current = %u", offset_1, current);
-        assert(offset_1 <= current +1);   /* check repIndex */
 
-        if ( (((U32)((prefixStartIndex-1) - repIndex) >= 3) /* intentional underflow */ & (repIndex > dictStartIndex))
+        if ( ( ((U32)((prefixStartIndex-1) - repIndex) >= 3) /* intentional underflow */
+             & (offset_1 < current+1 - dictStartIndex) ) /* note: we are searching at current+1 */
            && (MEM_read32(repMatch) == MEM_read32(ip+1)) ) {
             const BYTE* const repMatchEnd = repIndex < prefixStartIndex ? dictEnd : iend;
             size_t const rLength = ZSTD_count_2segments(ip+1 +4, repMatch +4, iend, repMatchEnd, prefixStart) + 4;
@@ -453,7 +453,7 @@ static size_t ZSTD_compressBlock_fast_extDict_generic(
                 U32 const current2 = (U32)(ip-base);
                 U32 const repIndex2 = current2 - offset_2;
                 const BYTE* const repMatch2 = repIndex2 < prefixStartIndex ? dictBase + repIndex2 : base + repIndex2;
-                if ( (((U32)((prefixStartIndex-1) - repIndex2) >= 3) & (repIndex2 > dictStartIndex))  /* intentional overflow */
+                if ( (((U32)((prefixStartIndex-1) - repIndex2) >= 3) & (offset_2 < current - dictStartIndex))  /* intentional overflow */
                    && (MEM_read32(repMatch2) == MEM_read32(ip)) ) {
                     const BYTE* const repEnd2 = repIndex2 < prefixStartIndex ? dictEnd : iend;
                     size_t const repLength2 = ZSTD_count_2segments(ip+4, repMatch2+4, iend, repEnd2, prefixStart) + 4;
diff --git a/sys/contrib/openzfs/module/zstd/lib/compress/zstd_lazy.c b/sys/contrib/openzfs/module/zstd/lib/compress/zstd_lazy.c
index 4cf5c88b5325..22d80597ec62 100644
--- a/sys/contrib/openzfs/module/zstd/lib/compress/zstd_lazy.c
+++ b/sys/contrib/openzfs/module/zstd/lib/compress/zstd_lazy.c
@@ -975,7 +975,8 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
             const U32 repIndex = (U32)(current+1 - offset_1);
             const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
             const BYTE* const repMatch = repBase + repIndex;
-            if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > windowLow))   /* intentional overflow */
+            if ( ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow */
+               & (offset_1 < current+1 - windowLow) ) /* note: we are searching at current+1 */
             if (MEM_read32(ip+1) == MEM_read32(repMatch)) {
                 /* repcode detected we should take it */
                 const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
@@ -1006,7 +1007,8 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
                 const U32 repIndex = (U32)(current - offset_1);
                 const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
                 const BYTE* const repMatch = repBase + repIndex;
-                if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > windowLow))  /* intentional overflow */
+                    if ( ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow : do not test positions overlapping 2 memory segments  */
+                       & (offset_1 < current - windowLow) ) /* equivalent to `current > repIndex >= windowLow` */
                 if (MEM_read32(ip) == MEM_read32(repMatch)) {
                     /* repcode detected */
                     const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
@@ -1037,7 +1039,8 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
                     const U32 repIndex = (U32)(current - offset_1);
                     const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
                     const BYTE* const repMatch = repBase + repIndex;
-                    if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > windowLow))  /* intentional overflow */
+                if ( ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow : do not test positions overlapping 2 memory segments  */
+                   & (offset_1 < current - windowLow) ) /* equivalent to `current > repIndex >= windowLow` */
                     if (MEM_read32(ip) == MEM_read32(repMatch)) {
                         /* repcode detected */
                         const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
@@ -1083,7 +1086,8 @@ size_t ZSTD_compressBlock_lazy_extDict_generic(
             const U32 repIndex = repCurrent - offset_2;
             const BYTE* const repBase = repIndex < dictLimit ? dictBase : base;
             const BYTE* const repMatch = repBase + repIndex;
-            if (((U32)((dictLimit-1) - repIndex) >= 3) & (repIndex > windowLow))  /* intentional overflow */
+            if ( ((U32)((dictLimit-1) - repIndex) >= 3) /* intentional overflow : do not test positions overlapping 2 memory segments  */
+               & (offset_2 < repCurrent - windowLow) ) /* equivalent to `curr > repIndex >= windowLow` */
             if (MEM_read32(ip) == MEM_read32(repMatch)) {
                 /* repcode detected we should take it */
                 const BYTE* const repEnd = repIndex < dictLimit ? dictEnd : iend;
diff --git a/sys/contrib/openzfs/rpm/generic/zfs.spec.in b/sys/contrib/openzfs/rpm/generic/zfs.spec.in
index 251470a67fba..8c538a00d203 100644
--- a/sys/contrib/openzfs/rpm/generic/zfs.spec.in
+++ b/sys/contrib/openzfs/rpm/generic/zfs.spec.in
@@ -3,7 +3,7 @@
 
 # Set the default udev directory based on distribution.
 %if %{undefined _udevdir}
-%if 0%{?fedora}%{?rhel}%{?centos}%{?openEuler}
+%if 0%{?rhel}%{?fedora}%{?centos}%{?suse_version}%{?openEuler}
 %global _udevdir    %{_prefix}/lib/udev
 %else
 %global _udevdir    /lib/udev
@@ -12,7 +12,7 @@
 
 # Set the default udevrule directory based on distribution.
 %if %{undefined _udevruledir}
-%if 0%{?fedora}%{?rhel}%{?centos}%{?openEuler}
+%if 0%{?rhel}%{?fedora}%{?centos}%{?suse_version}%{?openEuler}
 %global _udevruledir    %{_prefix}/lib/udev/rules.d
 %else
 %global _udevruledir    /lib/udev/rules.d
@@ -21,7 +21,7 @@
 
 # Set the default dracut directory based on distribution.
 %if %{undefined _dracutdir}
-%if 0%{?fedora}%{?rhel}%{?centos}%{?openEuler}
+%if 0%{?rhel}%{?fedora}%{?centos}%{?suse_version}%{?openEuler}
 %global _dracutdir  %{_prefix}/lib/dracut
 %else
 %global _dracutdir  %{_prefix}/share/dracut
@@ -110,7 +110,7 @@ BuildRequires:  libblkid-devel
 BuildRequires:  libudev-devel
 BuildRequires:  libattr-devel
 BuildRequires:  openssl-devel
-%if 0%{?fedora}%{?openEuler} || 0%{?rhel} >= 8 || 0%{?centos} >= 8
+%if 0%{?fedora}%{?suse_version}%{?openEuler} || 0%{?rhel} >= 8 || 0%{?centos} >= 8
 BuildRequires:  libtirpc-devel
 %endif
 
diff --git a/sys/contrib/openzfs/tests/runfiles/common.run b/sys/contrib/openzfs/tests/runfiles/common.run
index 005c539fc89d..7a7cf927c77e 100644
--- a/sys/contrib/openzfs/tests/runfiles/common.run
+++ b/sys/contrib/openzfs/tests/runfiles/common.run
@@ -704,7 +704,7 @@ tags = ['functional', 'nestedfs']
 
 [tests/functional/no_space]
 tests = ['enospc_001_pos', 'enospc_002_pos', 'enospc_003_pos',
-    'enospc_df', 'enospc_rm']
+    'enospc_df', 'enospc_ganging', 'enospc_rm']
 tags = ['functional', 'no_space']
 
 [tests/functional/nopwrite]
diff --git a/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in b/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in
index cb453b266f3c..28276ebc47e3 100755
--- a/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in
+++ b/sys/contrib/openzfs/tests/test-runner/bin/test-runner.py.in
@@ -297,7 +297,7 @@ User: %s
         proc = Popen(privcmd, stdout=PIPE, stderr=PIPE)
         # Allow a special timeout value of 0 to mean infinity
         if int(self.timeout) == 0:
-            self.timeout = sys.maxsize
+            self.timeout = sys.maxsize / (10 ** 9)
         t = Timer(int(self.timeout), self.kill_cmd, [proc])
 
         try:
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/Makefile.am b/sys/contrib/openzfs/tests/zfs-tests/tests/Makefile.am
index bbe94f9177ae..ad2ec4670556 100644
--- a/sys/contrib/openzfs/tests/zfs-tests/tests/Makefile.am
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/Makefile.am
@@ -1539,6 +1539,7 @@ nobase_dist_datadir_zfs_tests_tests_SCRIPTS += \
 	functional/no_space/enospc_002_pos.ksh \
 	functional/no_space/enospc_003_pos.ksh \
 	functional/no_space/enospc_df.ksh \
+	functional/no_space/enospc_ganging.ksh \
 	functional/no_space/enospc_rm.ksh \
 	functional/no_space/setup.ksh \
 	functional/online_offline/cleanup.ksh \
diff --git a/sys/contrib/openzfs/tests/zfs-tests/tests/functional/no_space/enospc_ganging.ksh b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/no_space/enospc_ganging.ksh
new file mode 100755
index 000000000000..1d35fba5dbfa
--- /dev/null
+++ b/sys/contrib/openzfs/tests/zfs-tests/tests/functional/no_space/enospc_ganging.ksh
@@ -0,0 +1,86 @@
+#!/bin/ksh
+
+#
+# This file and its contents are supplied under the terms of the
+# Common Development and Distribution License ("CDDL"), version 1.0.
+# You may only use this file in accordance with the terms of version
+# 1.0 of the CDDL.
+#
+# A full copy of the text of the CDDL should have accompanied this
+# source.  A copy of the CDDL is also available via the Internet at
+# http://www.illumos.org/license/CDDL.
+#
+
+. $STF_SUITE/include/libtest.shlib
+
+#
+# DESCRIPTION:
+# Exercise gang block IO paths for non-encrypted and encrypted datasets.
+#
+
+verify_runnable "both"
+log_assert "Verify IO when file system is full and ganging."
+
+function cleanup
+{
+        log_must set_tunable64 METASLAB_FORCE_GANGING $metaslab_force_ganging
+	default_cleanup_noexit
+}
+
+log_onexit cleanup
+
+default_setup_noexit $DISKS
+
+typeset metaslab_force_ganging=$(get_tunable METASLAB_FORCE_GANGING)
+shift=$(random_int_between 15 17)
+log_must set_tunable64 METASLAB_FORCE_GANGING $((2**$shift))
+
+keyfile=/$TESTPOOL/keyencfods
+log_must eval "echo 'password' > $keyfile"
+bs=1024k
+count=512
+
+log_must dd if=/dev/urandom of=$TESTDIR/data bs=$bs count=$count
+data_checksum=$(sha256digest $TESTDIR/data)
+
+# Test common large block configuration.
+log_must zfs create -o recordsize=1m -o primarycache=metadata $TESTPOOL/gang
+mntpnt=$(get_prop mountpoint $TESTPOOL/gang)
+
+log_must dd if=$TESTDIR/data of=$mntpnt/file bs=$bs count=$count
+sync_pool $TESTPOOL
+log_must dd if=$mntpnt/file of=$TESTDIR/out bs=$bs count=$count
+out_checksum=$(sha256digest $TESTDIR/out)
+
+if [[ "$data_checksum" != "$out_checksum" ]]; then
+    log_fail "checksum mismatch ($data_checksum != $out_checksum)"
+fi
+
+log_must rm -f $TESTDIR/out
+log_must zfs destroy $TESTPOOL/gang
+
+# Test common large block configuration with encryption.
+log_must zfs create \
+	-o recordsize=1m \
+	-o primarycache=metadata \
+	-o compression=off \
+	-o encryption=on \
+	-o keyformat=passphrase \
+	-o keylocation=file://$keyfile \
+	-o copies=2 \
+	$TESTPOOL/gang
+mntpnt=$(get_prop mountpoint $TESTPOOL/gang)
+
+log_must dd if=$TESTDIR/data of=$mntpnt/file bs=$bs count=$count
+sync_pool $TESTPOOL
+log_must dd if=$mntpnt/file of=$TESTDIR/out bs=$bs count=$count
+out_checksum=$(sha256digest $TESTDIR/out)
+
+if [[ "$data_checksum" != "$out_checksum" ]]; then
+    log_fail "checksum mismatch ($data_checksum != $out_checksum)"
+fi
+
+log_must rm -f $TESTDIR/out
+log_must zfs destroy $TESTPOOL/gang
+
+log_pass "Verified IO when file system is full and ganging."
diff --git a/sys/modules/zfs/zfs_config.h b/sys/modules/zfs/zfs_config.h
index 5c30abf047f4..0d4fea6ea856 100644
--- a/sys/modules/zfs/zfs_config.h
+++ b/sys/modules/zfs/zfs_config.h
@@ -296,6 +296,9 @@
 /* fault_in_iov_iter_readable() is available */
 /* #undef HAVE_FAULT_IN_IOV_ITER_READABLE */
 
+/* filemap_range_has_page() is available */
+/* #undef HAVE_FILEMAP_RANGE_HAS_PAGE */
+
 /* fops->aio_fsync() exists */
 /* #undef HAVE_FILE_AIO_FSYNC */
 
@@ -985,7 +988,7 @@
 /* #undef ZFS_IS_GPL_COMPATIBLE */
 
 /* Define the project alias string. */
-#define ZFS_META_ALIAS "zfs-2.1.99-FreeBSD_g9cd71c860"
+#define ZFS_META_ALIAS "zfs-2.1.99-FreeBSD_g57cfae4a2"
 
 /* Define the project author. */
 #define ZFS_META_AUTHOR "OpenZFS"
@@ -1015,7 +1018,7 @@
 #define ZFS_META_NAME "zfs"
 
 /* Define the project release. */
-#define ZFS_META_RELEASE "FreeBSD_g9cd71c860"
+#define ZFS_META_RELEASE "FreeBSD_g57cfae4a2"
 
 /* Define the project version. */
 #define ZFS_META_VERSION "2.1.99"
diff --git a/sys/modules/zfs/zfs_gitrev.h b/sys/modules/zfs/zfs_gitrev.h
index 334a458f9647..0d4020f71888 100644
--- a/sys/modules/zfs/zfs_gitrev.h
+++ b/sys/modules/zfs/zfs_gitrev.h
@@ -1 +1 @@
-#define	ZFS_META_GITREV "zfs-2.1.99-1706-g9cd71c860"
+#define	ZFS_META_GITREV "zfs-2.1.99-1734-g57cfae4a2"