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

On Fri, 2012-07-06 at 15:10 +0100, Jose Manuel dos Santos Calhariz
> 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


Ben Hutchings
Sturgeon's Law: Ninety percent of everything is crap.

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