Re: md raid6 deadlock on write

[Jose Manuel dos Santos Calhariz <jose.calhariz@netvisao.pt>]

[-- Attachment #1: Type: text/plain, Size: 1428 bytes --]

On Wed, Jul 04, 2012 at 11:24:11AM +0100, Jose Manuel dos Santos Calhariz wrote:
> On Wed, Jul 04, 2012 at 11:38:11AM +1000, 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.
> 
> We will do it, at first opportunity.

We have two machines that are running fio for 24 hours without
problems.  So the bug seams to be fixed, thank you.

Any possibility of the fix being ported to kernel 3.2?

> 
> > 
> > > 
> > >   - there is information from "SysRq : Show State", not attached
> > >     because is too big,
> > 
> > How big is too big?  It is very hard to see if there is anything useful in
> > there if I cannot see it....
> 
> Big enough to be blocked by the mailing list ;-)
> 
> I am attaching now, so you can see it.
> 
> > 
> > NeilBrown
> > 
> 
> 
>         Jose Calhariz
> 

      Jose Calhariz





-- 
--
"Existem 3 poderes soberanos:
Deus no céu, o Papa no Vaticano e Dadá Maravilha na grande área."
--Dadá Maravilha

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 836 bytes --]