linux-kernel - Re: 2.6.24-rc1 - Regularly getting processes stuck in D state on startup

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Message-Id: <20071106174626.3c7d3a14.sfr@canb.auug.org.au>
Date:	Tue, 6 Nov 2007 17:46:26 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	David <david@...olicited.net>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.24-rc1 - Regularly getting processes stuck in D state on
 startup

On Mon, 05 Nov 2007 18:23:07 +0000 David <david@...olicited.net> wrote:
>
> I've been testing rc1 for a week or so, and about 25% of the time I'm
> seeing Firefox and Thunderbird getting stuck in 'D' state as they startup.
> 
> I've attached the output of Sysrq-T to this mail... system is a
> dual-core AMD64, and files are on a RAID-1 root partition connected two
> SATA disks on the on-board NVidia controller. I've had no problems
> before .24 rc1

I am seeing something very similar on a PowerPC machine where copying a
file from an LVM volume with ext3 on it to a simple scsi partition (again
ext3) on the same disk will hang in congestion_wait.  If I am patient
enough, the copy makes very slow progress.  A kill -9 will kill it
eventually, but a simple control-C will not.

This hang occurs more often than not (and usually when I am trying to
install a new kernel into /boot for testing :-)).

I don't have access to the machine today, but if more information would
be useful, I could boot into 2.6.24-rc1-<mumble> again tomorrow.

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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