c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 18:40:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

Pool allocation classes misplacing small file blocks

Browse Source 
Due to an off-by-one condition in spa_preferred_class() we are picking
the "normal" allocation class instead of the "special" one for file
blocks with size equal to the special_small_blocks property value.

This change fix the small code issue, update the ZFS Test Suite and the
zfs(8) man page.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Don Brady <don.brady@delphix.com>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #8351
Closes #8361
This commit is contained in:
loli10K
2019-02-08 21:32:12 +01:00
committed by Matthew Ahrens
parent 0902c4577f
commit 4417096956
3 changed files with 47 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
man/man8/zfs.8
+5 -3
View File
@@ -1521,9 +1521,11 @@ This feature must be enabled to be used
.Pc .
.It Sy special_small_blocks Ns = Ns Em size
This value represents the threshold block size for including small file
blocks into the special allocation class. Valid values are zero or a
power of two from 512B up to 128K. The default size is 0 which means no
small file blocks will be allocated in the special class.
blocks into the special allocation class. Blocks smaller than or equal to this
value will be assigned to the special allocation class while greater blocks
will be assigned to the regular class. Valid values are zero or a power of two
from 512B up to 128K. The default size is 0 which means no small file blocks
will be allocated in the special class.
.Pp
Before setting this property, a special class vdev must be added to the
pool. See