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Date: Wed, 29 Aug 2001 13:47:47 -0700
From: Andrew Morton <akpm@zip.com.au>
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To: David Rees <dbr@greenhydrant.com>
CC: linux-raid@vger.kernel.org, linux-kernel@vger.kernel.org,
        ext3-users@redhat.com
Subject: Re: kupdated, bdflush and kjournald stuck in D state on RAID1 device 
 (deadlock?)
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David Rees wrote:
> 
> ...
> USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
> root         1  0.0  0.0  1368   72 ?        S    Aug27   0:05 init [3]
> root         2  0.0  0.0     0    0 ?        SW   Aug27   0:00 [keventd]
> root         3  0.0  0.0     0    0 ?        SWN  Aug27   0:00 [ksoftirqd_CPU0]
> root         4  0.0  0.0     0    0 ?        SW   Aug27   0:03 [kswapd]
> root         5  0.0  0.0     0    0 ?        SW   Aug27   0:00 [kreclaimd]
> root         6  0.0  0.0     0    0 ?        DW   Aug27   0:00 [bdflush]
> root         7  0.0  0.0     0    0 ?        DW   Aug27   0:00 [kupdated]
> root         9  0.0  0.0     0    0 ?        SW<  Aug27   0:00 [mdrecoveryd]
> root        10  0.0  0.0     0    0 ?        SW<  Aug27   0:00 [raid1d]
> root        11  0.0  0.0     0    0 ?        SW   Aug27   0:02 [kjournald]
> root       130  0.0  0.0     0    0 ?        SW   Aug27   0:00 [kjournald]
> root       131  0.0  0.0     0    0 ?        DW   Aug27   0:01 [kjournald]
> root       374  0.0  0.0  1428  176 ?        S    Aug27   0:00 syslogd -m 0
> root       379  0.0  0.0  1984  396 ?        S    Aug27   0:00 klogd -2
> [sybase@zorro ~]$
> 
> As you can see, bdflush, kupdated and kjournald appear to be deadlocked.
> 

Certainly seems that way.

Can you please send the output of

	ps xwo pid,command,wchan

Also, try a SYSRQ-T and, if the result makes it into the
logs, please pass it through `ksymoops -m System.map'.

Thanks.

-