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Bug#584881: Lockups under heavy disk IO; md (RAID) resync/check implicated



On Mon, 2010-06-07 at 10:53 +0100, Ian Jackson wrote:
> Package: linux-image-2.6.26-2-686-bigmem
> Version: 2.6.26-21lenny4
> 
> I keep getting soft lockups; the symptoms appear to be that user
> processes become deadlocked when they try to access the disk, but the
> kernel doesn't notice that anything is wrong.
[...]

We really need to see the kernel messages reporting soft-lockup.

Note that your disk configuration is unusual and probably not
well-tested by others.  It is unlikely that anyone in the kernel team
will be able to debug this as I don't think any of us have particular
expertise in this area.  If you have the opportunity, it would be
helpful if you could test a newer kernel version.  This would give us a
clue as to whether the bug has subsequently been fixed upstream, and if
not then it would be the basis for an upstream bug report.

Ben.

-- 
Ben Hutchings
Once a job is fouled up, anything done to improve it makes it worse.

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