netdev - Re: [PATCH] Fix soft lockups/OOM issues w/ unix garbage collector

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Message-Id: <20081126.153243.85669383.davem@davemloft.net>
Date:	Wed, 26 Nov 2008 15:32:43 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	dannf@...nf.org
Cc:	netdev@...r.kernel.org, eteo@...hat.com
Subject: Re: [PATCH] Fix soft lockups/OOM issues w/ unix garbage collector

From: dann frazier <dannf@...nf.org>
Date: Wed, 26 Nov 2008 10:04:02 -0700

> This is an implementation of David Miller's suggested fix in:
>   https://bugzilla.redhat.com/show_bug.cgi?id=470201
> 
> It has been updated to use wait_event() instead of
> wait_event_interruptible().
> 
> Paraphrasing the description from the above report, it makes sendmsg()
> block while UNIX garbage collection is in progress. This avoids a
> situation where child processes continue to queue new FDs over a
> AF_UNIX socket to a parent which is in the exit path and running
> garbage collection on these FDs. This contention can result in soft
> lockups and oom-killing of unrelated processes.
> 
> Signed-off-by: dann frazier <dannf@...com>

Applied, thanks a lot Dann.
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