Description of problem:
As reported in http://www.mysqlperformanceblog.com/2012/03/15/ext4-vs-xfs-on-ssd/
There is contention problem in XFS, and the fix is available
Would be good to have a fix in RedHat, as it allows to gain performance 4x.
Version-Release number of selected component (if applicable):
Not an xfsdump bug.
FWIW, that patch is not yet upstream. I'll leave it to Dave's judgement about when it may be ready for RHEL backport.
(In reply to comment #3)
> FWIW, that patch is not yet upstream. I'll leave it to Dave's judgement
> about when it may be ready for RHEL backport.
The patch was superceded by this series of commits:
507630b xfs: use shared ilock mode for direct IO writes by default
193aec1 xfs: push the ilock into xfs_zero_eof
f38996f xfs: reduce ilock hold times in xfs_setattr_size
467f789 xfs: reduce ilock hold times in xfs_file_aio_write_checks
b4d05e3 xfs: avoid taking the ilock unnessecarily in xfs_qm_dqattach
which have gone upstream into 3.5-rc1. I'll be backporting those....
Assigning over to Dave, given the last comment.
This request was evaluated by Red Hat Product Management for
inclusion in a Red Hat Enterprise Linux release. Product
Management has requested further review of this request by
Red Hat Engineering, for potential inclusion in a Red Hat
Enterprise Linux release for currently deployed products.
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Posted to rhkernel-list:
Patch(es) available on kernel-2.6.32-328.el6
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.