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SubjectRe: [3.2.2] tasks blocked during matrix auto checking.
Date
On Tuesday 07 of February 2012 09:47:51 NeilBrown wrote:
> On Mon, 06 Feb 2012 13:02 +0100 Pawel Sikora <pawel.sikora@agmk.net> wrote:
>
> > Hi,
> >
> > on heavy loaded opterons i've noticed some blocked tasks during matrix auto checking.
> > is it a known issue?
>
> No.... maybe not too surprising though.
> The data-check will pause to let other IO through, but if there is lots of IO
> queued up it could cause some longish delays...
>
> 2 minutes does seem a bit long though, so maybe there is a bug somewhere.
>
> And had 3 consecutive timeouts, so that makes it 6 minutes which really is
> too long.
>
> What sort of array was this? RAID1? RAID5 ??

~810GB in raid-10:

md2 : active raid10 sda4[0] sdd4[3] sdc4[2] sdb4[1]
849514496 blocks super 1.2 512K chunks 2 far-copies [4/4] [UUUU]



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