Don't inherit flags other than DS_FLAG_CI_DATASET and DS_FLAG_INCONSISTENT
when cloning. This prevents DS_FLAG_DEFER_DESTROY being inherited from a
clone that is marked for deferred destroy, which causes snapshots of the
clone being destroyed when getting a hold or clone.
Illumos issue:
5150 zfs clone of a defer_destroy snapshot causes strangeness
MFC after: 1 week
Add tunable for number of metaslabs per vdev
(vfs.zfs.vdev.metaslabs_per_vdev). The default remains
at 200.
Illumos issue:
5161 add tunable for number of metaslabs per vdev
MFC after: 2 weeks
In arc_kmem_reap_now(), reap range_seg_cache too to reclaim memory in
response of memory pressure.
Illumos issue:
5163 arc should reap range_seg_cache
MFC after: 1 week
Make space_map_truncate() always do space_map_reallocate(). Without
this, setting space_map_max_blksz would cause panic for existing pool,
as dmu_objset_set_blocksize would fail if the object have multiple blocks.
Illumos issues:
5164 space_map_max_blksz causes panic, does not work
5165 zdb fails assertion when run on pool with recently-enabled
spacemap_histogram feature
MFC after: 2 weeks
Remove previously added kmem methods in favour of defines which
allow diff minimisation between upstream code base.
Rebalance ARC free target to be vm_pageout_wakeup_thresh by default
which eliminates issue where ARC gets minimised instead of balancing
with VM pageout. The restores the target point prior to r270759.
Bring in missing upstream only changes which move unused code to
further eliminate code differences.
Add additional DTRACE probe to aid monitoring of ARC behaviour.
Enable upstream i386 code paths on platforms which don't define
UMA_MD_SMALL_ALLOC.
Fix mixture of byte an page values in arc_memory_throttle i386 code
path value assignment of available_memory.
PR: 187594
Review: D702
Reviewed by: avg
MFC after: 1 week
X-MFC-With: r270759 & r270861
Sponsored by: Multiplay
When performing snapshot renames we could deadlock due to the locking
in zvol_rename_minors. In order to avoid this use the same workaround
as zvol_open in zvol_rename_minors.
Add missing zvol_rename_minors to dsl_dataset_promote_sync.
Protect against invalid index into zv_name in zvol_remove_minors.
Replace zvol_remove_minor calls with zvol_remove_minors to ensure
any potential children are also renamed.
Don't fail zvol_create_minors if zvol_create_minor returns EEXIST.
Restore the valid pool check in zfs_ioc_destroy_snaps to ensure we
don't call zvol_remove_minors when zfs_unmount_snap fails.
PR: 193803
MFC after: 1 week
Sponsored by: Multiplay
This fix addresses only issues with the pynfs reports, none of these
issues are know to create problems for extant real clients.
Submitted by: Bart Hsiao <bart.hsiao@gmail.com>
Reworked by: myself
Reviewed by: rmacklem
Approved by: rmacklem
Sponsored by: QNAP Systems Inc.
This is checked for in the zfs_snapshot_004_neg STF/ATF test (currently
still in projects/zfsd rather than head).
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c:
- zfsvfs_create(): Check whether the objset name fits into
statfs.f_mntfromname, and return ENAMETOOLONG if not. Although
the filesystem can be unmounted via the umount(8) command, any
interface that relies on iterating on statfs (e.g. libzfs) will
fail to find the filesystem by its objset name, and thus assume
it's not mounted. This causes "zfs unmount", "zfs destroy",
etc. to fail on these filesystems, whether or not -f is passed.
MFC after: 1 month
Sponsored by: Spectra Logic
MFSpectraBSD: 974872 on 2013/08/09
This is primarily only of interest to ZFS developers, but it makes it
easier to get additional debugging.
Submitted by: gibbs
MFC after: 1 month
Sponsored by: Spectra Logic
MFSpectraBSD: 517074 on 2011/12/15 (by will), 662343 on 2013/03/20 (by gibbs)
If bpobj_space() returned non-zero here, the sublist would have been
left open, along with the bonus buffer hold it requires. This call
does not invoke any calls to bpobj_close() itself.
This bug doesn't have any known vector, but was found on inspection.
MFC after: 1 week
Sponsored by: Spectra Logic
Affects: All ZFS versions starting 21 May 2010 (illumos cde58dbc)
MFSpectraBSD: r1050998 on 2014/03/26
* vfs.zfs.vdev.async_write_active_min_dirty_percent
* vfs.zfs.vdev.async_write_active_max_dirty_percent
Added validation of min / max for ZFS sysctl
* vfs.zfs.dirty_data_max_percent
MFC after: 3 days
Correctly report hole at end of file.
When asked to find a hole, the DMU sees that there are no holes in the
object, and returns ESRCH. The ZPL interprets this as "no holes before
the end of the file", and therefore inserts the "virtual hole" at the
end of the file. Because DMU and ZPL have different ideas of where the
end of an object/file is, we will end up returning the end of file,
which is generally larger, instead of returning the end of object.
The fix is to handle the "virtual hole" in the DMU. If no hole is found,
the DMU will return a hole at the end of the file, rather than an error.
Illumos issue:
5139 SEEK_HOLE failed to report a hole at end of file
MFC after: 1 week
In zil_claim, don't issue warning if we get EBUSY (inconsistent) when
opening an objset, instead, ignore it silently.
Illumos issue:
5140 message about "%recv could not be opened" is printed when booting after crash
MFC after: 1 week
Add a new tunable/sysctl, vfs.zfs.free_max_blocks, which can be used to
limit how many blocks can be free'ed before a new transaction group is
created. The default is no limit (infinite), but we should probably have
a lower default, e.g. 100,000.
With this limit, we can guard against the case where ZFS could run out of
memory when destroying large numbers of blocks in a single transaction
group, as the entire DDT needs to be brought into memory.
Illumos issue:
5138 add tunable for maximum number of blocks freed in one txg
MFC after: 2 weeks
Enforce 4K as smallest indirect block size (previously the smallest
indirect block size was 1K but that was never used).
This makes some space estimates more accurate and uses less memory
for some data structures.
Illumos issue:
5141 zfs minimum indirect block size is 4K
MFC after: 2 weeks
In dnode_sync(), do dnode_increase_indirection() before processing
the dn_next_nblkptr.
Illumos issue:
5117 space map reallocation can cause corruption
MFC after: 3 days
Also restore kmem_used() check for i386 as it has KVA limits that the raw
page counts above don't consider
PR: 187594
Reviewed by: peter
X-MFC-With: r270759
Review: D700
Sponsored by: Multiplay
Prior to this change we triggered ARC reclaim when kmem usage passed 3/4
of the total available, as indicated by vmem_size(kmem_arena, VMEM_ALLOC).
This could lead large amounts of unused RAM e.g. on a 192GB machine with
ARC the only major RAM consumer, 40GB of RAM would remain unused.
The old method has also been seen to result in extreme RAM usage under
certain loads, causing poor performance and stalls.
We now trigger ARC reclaim when the number of free pages drops below the
value defined by the new sysctl vfs.zfs.arc_free_target, which defaults
to the value of vm.v_free_target.
Credit to Karl Denninger for the original patch on which this update was
based.
PR: 191510 and 187594
Tested by: dteske
MFC after: 1 week
Relnotes: yes
Sponsored by: Multiplay
In vdev_get_stats, check that the vdev is not a hole before computing the
fragmentation. This fixes a panic when removing log device.
Illumos issue:
5049 panic when removing log device
Author: Alex Reece <alex@delphix.com>
MFC after: 2 weeks
Encode CPU's number by XOR'ing the CPU ID against the 64-bit cpu_ticks().
Reviewed by: mav, gibbs
Differential Revision: https://phabric.freebsd.org/D521
MFC after: 2 weeks
In dnode_children_t, use C99's "[]" idiom for declaring the variable
sized array dnc_children at the end of the structure.
This prevents the compiler from mistakenly optimizing away accesses
beyond the array's defined size.
Illumos issue:
5038 Remove "old-style" flexible array usage in ZFS.
Author: Justin T. Gibbs <justing@spectralogic.com>
MFC after: 2 weeks
This prevents recursion of vdev_queue_io_done as per r265321 but
using a different method as recommended on the openzfs list.
We now use zio_interrupt(zio) and return ZIO_PIPELINE_STOP instead
of returning ZIO_PIPELINE_CONTINUE from vdev_*_io_start methods.
zio_vdev_io_start now ASSERTS the that vdev_op_io_start returns
ZIO_PIPELINE_STOP to ensure future changes don't reintroduce
ZIO_PIPELINE_CONTINUE returns.
Cleanup flow in vdev_geom_io_start while I'm here.
Also fix some cases not using SET_ERROR(..)
MFC after: 2 weeks
X-MFC-With: r265321
Increase default ARC buf_hash_table size. When typical block size is small,
the hash table could be too small, which would lead to long hash chains and
limit performance for cached reads.
A new loader tunable, vfs.zfs.arc_average_blocksize, have been added which
allows users to override the default assumption of average (typical) block
size. Old default was 65536 (64 KiB) and new default is 8192 (8 KiB).
Illumos issue:
5034 ARC's buf_hash_table is too small
MFC after: 2 weeks
Change dn->dn_dbufs from linked list to AVL tree.
Illumos issues:
4873 zvol unmap calls can take a very long time for larger datasets
MFC after: 2 weeks
code behave more like it is on Solaris.
Reported by: avg
Reviewed by: avg, mav (but bugs are mine)
Differential Revision: https://phabric.freebsd.org/D457
postponing it to zfs_vget(). zfs_root() returned vnode with the
default value of v_hash, which caused inconsistent v_hash value when
root vnode was obtained from zfs_vget().
Nullfs allocated two upper vnodes for the root zfs vnode due to
different hashes, causing consistency problems.
Reported and tested by: Harald Schmalzbauer <h.schmalzbauer@omnilan.de>
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
