From: Paul Jackson <pj@sgi.com>
To: KUROSAWA Takahiro <kurosawa@valinux.co.jp>
Cc: linux-kernel@vger.kernel.org
Subject: Re: oom-killer causes lockups in cpuset_excl_nodes_overlap()
Date: Tue, 3 Jan 2006 13:34:48 -0800 [thread overview]
Message-ID: <20060103133448.7530f879.pj@sgi.com> (raw)
In-Reply-To: <20051228004026.72F3474005@sv1.valinux.co.jp>
KUROSAWA Takahiro wrote:
>
> The oom-killer causes lockups because it calls
> cpuset_excl_nodes_overlap() with tasklist_lock read-locked.
> cpuset_excl_nodes_overlap() gets cpuset_sem (or callback_sem in
> later linux versions) semaphore, which might_sleep even if the
> semaphore could be down without sleeping.
Thank-you for catching this. My apologies for not responding sooner.
I was off the air for a week. I will look at this now.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401
prev parent reply other threads:[~2006-01-03 21:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-28 0:40 oom-killer causes lockups in cpuset_excl_nodes_overlap() KUROSAWA Takahiro
2005-12-31 13:23 ` Kirill Korotaev
2006-01-03 21:34 ` Paul Jackson [this message]
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