* raid0 to raid10 takeover bug
@ 2010-12-16 14:50 Wojcik, Krzysztof
2010-12-16 23:24 ` Neil Brown
0 siblings, 1 reply; 2+ messages in thread
From: Wojcik, Krzysztof @ 2010-12-16 14:50 UTC (permalink / raw)
To: linux-raid@vger.kernel.org
Hi,
I would like to report a bug connected with raid0 to raid10 takeover operation.
When we add a spare drive to array after takeover, recovery process has been triggered but it is not finish- it stops at about 90%.
"resync" process is in uninterruptable sleep state (D). Deadlock?
It is reproducible on native and imsm metadata.
Any ideas, suggestions?
Regards- Krzysztof
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: raid0 to raid10 takeover bug
2010-12-16 14:50 raid0 to raid10 takeover bug Wojcik, Krzysztof
@ 2010-12-16 23:24 ` Neil Brown
0 siblings, 0 replies; 2+ messages in thread
From: Neil Brown @ 2010-12-16 23:24 UTC (permalink / raw)
To: Wojcik, Krzysztof; +Cc: linux-raid@vger.kernel.org
On Thu, 16 Dec 2010 14:50:42 +0000 "Wojcik, Krzysztof"
<krzysztof.wojcik@intel.com> wrote:
> Hi,
>
> I would like to report a bug connected with raid0 to raid10 takeover operation.
> When we add a spare drive to array after takeover, recovery process has been triggered but it is not finish- it stops at about 90%.
> "resync" process is in uninterruptable sleep state (D). Deadlock?
> It is reproducible on native and imsm metadata.
> Any ideas, suggestions?
>
I would start by getting a stack trace of all relevant processes, with by
echo t > /proc/sysrq-trigger
or
cat /proc/XXXX/stack
Find out where the processes is waiting.
An 'D' stands for 'Disk wait' rather than 'Deadlock'.
It is a by if an anachronistic name as it is really any uninterruptible wait,
which can be for things other than waiting for Disk.
NeilBrown
^ permalink raw reply [flat|nested] 2+ messages in thread
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