Bug 807503 - xfs contention problem
xfs contention problem
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel (Show other bugs)
x86_64 Linux
unspecified Severity high
: rc
: ---
Assigned To: Dave Chinner
Boris Ranto
Depends On:
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Reported: 2012-03-27 21:49 EDT by Vadim Tkachenko
Modified: 2013-02-21 01:05 EST (History)
6 users (show)

See Also:
Fixed In Version: kernel-2.6.32-328.el6
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2013-02-21 01:05:21 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Vadim Tkachenko 2012-03-27 21:49:26 EDT
Description of problem:

As reported in http://www.mysqlperformanceblog.com/2012/03/15/ext4-vs-xfs-on-ssd/
in commented

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):

RedHat 6.2
Comment 2 Eric Sandeen 2012-03-27 23:54:22 EDT
Not an xfsdump bug.
Comment 3 Eric Sandeen 2012-07-06 16:09:06 EDT
FWIW, that patch is not yet upstream.  I'll leave it to Dave's judgement about when it may be ready for RHEL backport.
Comment 4 Dave Chinner 2012-07-09 23:46:31 EDT
(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The patch was superceded by this series of commits: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....


Comment 5 Eric Sandeen 2012-08-27 19:42:55 EDT
Assigning over to Dave, given the last comment.
Comment 6 RHEL Product and Program Management 2012-09-20 16:50:48 EDT
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.
This request is not yet committed for inclusion in a release.
Comment 7 Dave Chinner 2012-09-24 22:19:15 EDT
Posted to rhkernel-list:

Comment 9 Jarod Wilson 2012-10-10 16:09:14 EDT
Patch(es) available on kernel-2.6.32-328.el6
Comment 14 errata-xmlrpc 2013-02-21 01:05:21 EST
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.


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