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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0006087||CentOS-6||kernel||public||2012-11-24 10:42||2013-04-23 21:14|
|OS||Centos 6||OS Version||2.6.32-279.14.1|
|Summary||0006087: xfsaild always in D state|
|Description||Hi, after kernel upgrade to 2.6.32-279.14.1.el6.x86_64 xfsaild is always in D state, what reproduce wrong/high load average in top/uptime commands:|
1168 root 20 0 0 0 0 D 0.0 0.0 0:50.68 xfsaild/dm-11
1174 root 20 0 0 0 0 D 0.0 0.0 0:30.28 xfsaild/dm-7
1177 root 20 0 0 0 0 D 0.0 0.0 0:39.18 xfsaild/dm-8
1180 root 20 0 0 0 0 D 0.0 0.0 0:38.64 xfsaild/dm-9
And load average then for 4 processes load average: 4.45, 4.21, 4.15.
Vmstat, iostat shows all is normal.
It's not totally clear to me whether there is actually a problem, or
whether it's safe to ignore the higher load until there's a patch?
|Tags||No tags attached.|
|Got the same problem. Have same setup on 2 servers, but only 1 of them has this problem.|
I am seeing this as well.
root 855 0.1 0.0 0 0 ? D 08:37 0:04 [xfsaild/dm-2]
It's a freshly installed 6.3 with all updates applied running under VMWare ESXi.
|I am seeing it too, afaik it's a side effect of https://bugzilla.redhat.com/show_bug.cgi?id=860787|
|I got this problem with all CentOS installations with 2.6.32-279.14.1.el6.x86_64 kernel version. Per mounted partition you get an extra load of 1.|
|The same with 2.6.32-279.19.1.el6.x86_64 kernel version.|
|upgraded to third kernel, problem solved :)|
What is a "third kernel"?
According to this upstream BZ:
there is a proposed fix but planned for EL 6.5 (not a typo).
"Third kernel" (last version 3.0.59-1.el6.elrepo) is actually kernel-lt.
More information on http://elrepo.org/tiki/kernel-lt
In my opinion this works much better than 2.6.32
ELRepo's kernel-lt uses a stable kernel line 3.0.x from kernel.org. Brian Foster of Red Hat submitted a patch that fixes the bug to kernel.org and it is now in the stable/mainline kernels.
Using ELRepo's kernel is fine but may not be well justified in this particular case because this bug is just not "serious enough".
According to BZ 883905 (see the link above):
"The current consensus for this bug is that the fix is fine, but the appropriate target is rhel6.5 and forward, as this is primarily a reporting issue."
More details here:
"There is no side effect other than the load. There are not performance issues with the ailds behaving like this."
|i forgot to say, that we had also the problem with ksoftirqd to on servers with AMD processors, that was the real reason to upgrade to 3.0.x based kernel.|
If the ksoftirqd issue is the one being handled in bug #5813, please add your case there as well as to the upstream BZ ( https://bugzilla.redhat.com/show_bug.cgi?id=870573 ).
|The patch offered in https://bugzilla.redhat.com/show_bug.cgi?id=883905 cleanly applies to the CentOS 6.4 kernel (but that was not the case with the 6.3 kernel). Will try to include the fix in the next release of centosplus kernel.|
xfs-bug6087.patch (263 bytes)
--- xfs_trans_ail.c 2013-02-20 07:27:37.000000000 -0800 +++ xfs_trans_ail.c.new 2013-03-08 08:15:13.078745782 -0800 @@ -405,6 +405,7 @@ xfs_trans_ail_cursor_done(ailp, cur); spin_unlock(&ailp->xa_lock); *last_lsn = 0; + tout = 50; return tout; }
xfs-bug6087.patch (263 bytes)
|Patch file uploaded: http://bugs.centos.org/file_download.php?file_id=1445&type=bug|
|kernel-2.6.32-358.2.1.el6 was released upstream. The patch applied to the cplus kernel.|
|Fixed in the distro kernel-2.6.32-358.6.1.el6.|
|2012-11-24 10:42||ibox||New Issue|
|2012-11-28 11:55||avasilenko||Note Added: 0016088|
|2012-11-30 08:28||fbh||Note Added: 0016099|
|2012-11-30 08:56||tru||Note Added: 0016100|
|2012-11-30 08:56||tru||Status||new => confirmed|
|2012-12-20 03:email@example.com||Note Added: 0016163|
|2013-01-04 22:09||noloop||Note Added: 0016238|
|2013-01-04 22:39||noloop||Note Added: 0016239|
|2013-01-19 20:16||ibox||Note Added: 0016302|
|2013-01-20 03:59||toracat||Note Added: 0016303|
|2013-01-20 04:55||ibox||Note Added: 0016304|
|2013-01-20 09:03||toracat||Note Added: 0016305|
|2013-01-20 09:05||toracat||Category||-OTHER => kernel|
|2013-01-20 09:39||ibox||Note Added: 0016306|
|2013-01-20 17:40||toracat||Note Added: 0016307|
|2013-03-08 16:11||toracat||Note Added: 0016622|
|2013-03-08 16:17||toracat||File Added: xfs-bug6087.patch|
|2013-03-08 16:18||toracat||Note Added: 0016624|
|2013-03-12 20:09||toracat||Note Added: 0016681|
|2013-03-12 20:11||toracat||Status||confirmed => resolved|
|2013-03-12 20:11||toracat||Resolution||open => fixed|
|2013-04-23 21:13||toracat||Note Added: 0017272|
|2013-04-23 21:13||toracat||Status||resolved => feedback|
|2013-04-23 21:13||toracat||Resolution||fixed => reopened|
|2013-04-23 21:14||toracat||Status||feedback => resolved|
|2013-04-23 21:14||toracat||Resolution||reopened => fixed|