linux-kernel - Re: 2.6.23.1: mdadm/raid5 hung/d-state

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Date:	Mon, 5 Nov 2007 11:35:13 -0700
From:	"Dan Williams" <dan.j.williams@...il.com>
To:	"Justin Piszcz" <jpiszcz@...idpixels.com>
Cc:	"Neil Brown" <neilb@...e.de>, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org,
	"BERTRAND Joël" <joel.bertrand@...tella.fr>
Subject: Re: 2.6.23.1: mdadm/raid5 hung/d-state

On 11/4/07, Justin Piszcz <jpiszcz@...idpixels.com> wrote:
>
>
> On Mon, 5 Nov 2007, Neil Brown wrote:
>
> > On Sunday November 4, jpiszcz@...idpixels.com wrote:
> >> # ps auxww | grep D
> >> USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
> >> root       273  0.0  0.0      0     0 ?        D    Oct21  14:40 [pdflush]
> >> root       274  0.0  0.0      0     0 ?        D    Oct21  13:00 [pdflush]
> >>
> >> After several days/weeks, this is the second time this has happened, while
> >> doing regular file I/O (decompressing a file), everything on the device
> >> went into D-state.
> >
> > At a guess (I haven't looked closely) I'd say it is the bug that was
> > meant to be fixed by
> >
> > commit 4ae3f847e49e3787eca91bced31f8fd328d50496
> >
> > except that patch applied badly and needed to be fixed with
> > the following patch (not in git yet).
> > These have been sent to stable@ and should be in the queue for 2.6.23.2
> >
>
> Ah, thanks Neil, will be updating as soon as it is released, thanks.
>

Are you seeing the same "md thread takes 100% of the CPU" that Joël is
reporting?
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