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MFV r318934: 8070 Add some ZFS comments

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illumos/illumos-gate@40713f2b24
40713f2b24

https://www.illumos.org/issues/8070
  Add some ZFS comments left by various developers at different times

Reviewed by: Yuri Pankov <yuri.pankov@gmail.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Alan Somers <asomers@gmail.com>

MFC after:	1 week
This commit is contained in:
Andriy Gapon 2017-05-26 11:49:42 +00:00
commit 2cd05c2473
2 changed files with 8 additions and 1 deletions
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5
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c
View File

@ -1219,6 +1219,11 @@ dbuf_unoverride(dbuf_dirty_record_t *dr)
uint64_t txg = dr->dr_txg;
ASSERT(MUTEX_HELD(&db->db_mtx));
/*
* This assert is valid because dmu_sync() expects to be called by
* a zilog's get_data while holding a range lock. This call only
* comes from dbuf_dirty() callers who must also hold a range lock.
*/
ASSERT(dr->dt.dl.dr_override_state != DR_IN_DMU_SYNC);
ASSERT(db->db_level == 0);

4
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
View File

@ -807,7 +807,7 @@ dsl_scan_visitbp(blkptr_t *bp, const zbookmark_phys_t *zb,
return;
/*
* If dsl_scan_ddt() has aready visited this block, it will have
* If dsl_scan_ddt() has already visited this block, it will have
* already done any translations or scrubbing, so don't call the
* callback again.
*/
@ -1474,6 +1474,7 @@ dsl_scan_active(dsl_scan_t *scn)
return (used != 0);
}
/* Called whenever a txg syncs. */
void
dsl_scan_sync(dsl_pool_t *dp, dmu_tx_t *tx)
{
@ -1892,6 +1893,7 @@ dsl_scan_scrub_cb(dsl_pool_t *dp,
return (0);
}
/* Called by the ZFS_IOC_POOL_SCAN ioctl to start a scrub or resilver */
int
dsl_scan(dsl_pool_t *dp, pool_scan_func_t func)
{