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047187c1bd
mirror_zfs/tests/zfs-tests/tests/functional
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LOLi 047187c1bd Fix size inflation in spa_get_worst_case_asize() 
When we try assign a new transaction to a TXG we must know beforehand
if there is sufficient free space on disk. This is to decide,
in dmu_tx_assign(), if we should reject the TX with ENOSPC.

We rely on spa_get_worst_case_asize() to inflate the size of our
logical writes by a factor of spa_asize_inflation which is
calculated as:

   (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2 == 24

The problem with the current implementation is that we don't take
into account what happens with very small writes on VDEVs with large
physical block sizes.
Consider the case of writes to a dataset with recordsize=512,
copies=3 on a VDEV with ashift=13 (usually SSD with 8K block size):
every logical IO will end up allocating 3 * 8K = 24K on disk, so 512
bytes multiplied by 48, which is double the size we account for.
If we allow this kind of writes to be assigned a TX it is possible,
when the pool is almost full, to trigger an allocation failure
(ENOSPC) in the ZIO pipeline, which will in turn result in the whole
pool being suspended.

The bug is fixed by using, in spa_get_worst_case_asize(), the MAX()
value chosen between the logical io size from zfs_write() and the
maximum physical block size used among our VDEVs.

Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #5941
2017-04-10 15:28:21 -07:00
..
acl OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
atime OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
bootfs OpenZFS 7404 - rootpool_007_neg, bootfs_006_pos and bootfs_008_neg tests fail with the loader project bits 2017-04-07 14:18:19 -07:00
cache OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
cachefile OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
casenorm OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
chattr OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
checksum OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
clean_mirror OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
cli_root OpenZFS 2932 - support crash dumps to raidz, etc. pools 2017-04-10 10:24:17 -07:00
cli_user zfstests cli_user/misc/setup.ksh space missed 2017-04-09 16:00:43 -07:00
compression OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
ctime Fix coverity defects: CID 147643, 152204, 49339 2016-10-18 10:43:22 -07:00
delegate OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
devices OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
exec OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
fault OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
features OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
grow_pool OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
grow_replicas OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
history OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
inheritance OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
inuse OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
large_files OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
largest_pool OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
libzfs OpenZFS 5704 - libzfs can only handle 255 file descriptors 2017-02-10 10:54:30 -08:00
link_count OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
migration OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
mmap OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
mount OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
mv_files OpenZFS 7629 - Fix for 7290 neglected to remove some escape sequences 2017-04-07 09:30:05 -07:00
nestedfs OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
no_space Fix size inflation in spa_get_worst_case_asize() 2017-04-10 15:28:21 -07:00
nopwrite OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
online_offline OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
pool_names OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
poolversion OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
privilege OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
quota OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
raidz OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
redundancy OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
refquota OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
refreserv OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
rename_dirs OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
replacement OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
reservation zfstest reservation_009_pos.sh missed backslash 2017-04-09 16:15:44 -07:00
rootpool OpenZFS 7404 - rootpool_007_neg, bootfs_006_pos and bootfs_008_neg tests fail with the loader project bits 2017-04-07 14:18:19 -07:00
rsend OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
scrub_mirror OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
slog OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
snapshot zfstest - replace dircmp with diff 2017-04-09 16:17:55 -07:00
snapused OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
sparse OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
threadsappend OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
tmpfile Add tmpfile_003_pos to .gitignore 2017-02-03 13:42:49 -08:00
truncate OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
upgrade OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
userquota OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
vdev_zaps OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
write_dirs OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
xattr OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
zvol OpenZFS 7290 - ZFS test suite needs to control what utilities it can run 2017-04-06 09:25:36 -07:00
Makefile.am Add auto-online test for ZED/FMA as part of the ZTS 2017-02-28 16:25:39 -08:00