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Bug#680366: linux-image-3.2.0-0.bpo.2-amd64: md raid6 deadlock on write



On Sat, 21 Jul 2012 23:33:35 +0100 Ben Hutchings <ben@decadent.org.uk> wrote:

> On Fri, 2012-07-06 at 15:10 +0100, Jose Manuel dos Santos Calhariz
> wrote:
> > The Linus git tree for linux kernel, for kernel 3.5-rc, have the fix
> > for this bug.
> > 
> > Two machines can now run fio command for 24 hours, instead of minutes
> > when running last kernel from Linus git tree, up to commit 9e85a6f.
> > 
> > For more information follow the thread on linux-raid@vger.kernel.org:
> > http://marc.info/?l=linux-raid&m=134136614330049&w=4
> 
> Following that link:
> 
> NeilBrown wrote:
> > On Mon, 2 Jul 2012 23:15:08 +0100 Jose Manuel dos Santos Calhariz
> > <jose.calhariz@netvisao.pt> wrote:
> > 
> > >
> > > We have a group of servers with a LVM over a RAID6 of 16 drives.
> > > During normal work loads, sometimes, the md raid enter on deadlock for
> > > writes and only a power off/power on allows to recover the machine.
> > 
> > This might be fixed by the following commit which was recently included in
> > 3.5-rc. If could test with that I'd appreciate it.
> 
> ...but with no commit reference.  Neil, do you remember which commit you
> meant?

commit fab363b5ff502d1b39ddcfec04271f5858d9f26e
Author: Shaohua Li <shli@kernel.org>
Date:   Tue Jul 3 15:57:19 2012 +1000

    raid5: delayed stripe fix

NeilBrown

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