linux-kernel - Re: 2.6.35-rc3 deadlocks on semaphore operations

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Message-ID: <4C1CA49B.7020104@colorfullife.com>
Date:	Sat, 19 Jun 2010 13:06:03 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org, Julia Lawall <julia@...u.dk>
Subject: Re: 2.6.35-rc3 deadlocks on semaphore operations

On 06/18/2010 04:49 PM, Christoph Lameter wrote:
> linux-2.6$ strace -p21561
> Process 21561 attached - interrupt to quit
> semop(32768, {{0, -1, SEM_UNDO}}, 1
>
> linux-2.6$ strace -p21751
> Process 21751 attached - interrupt to quit
> semop(32768, {{0, -1, SEM_UNDO}}, 1
>
> linux-2.6$ strace -p21792
> Process 21792 attached - interrupt to quit
> semop(32768, {{0, -1, SEM_UNDO}}, 1
>
> linux-2.6$ strace -p21793
> Process 21793 attached - interrupt to quit
> semop(32768, {{0, -1, SEM_UNDO}}, 1
>
>    
What are the semaphore values?

Could you run
$ ipcs
$ cat /proc/sysvipc/sem
$ ./getall 32768 -v

getall is attached.

--
     Manfred


View attachment "getall.c" of type "text/plain" (1730 bytes)