netdev - Re: net-2.6.22 UDP stalls/hangs

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Message-Id: <20070423.151531.70219647.davem@davemloft.net>
Date:	Mon, 23 Apr 2007 15:15:31 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...ux-foundation.org
Cc:	netdev@...r.kernel.org
Subject: Re: net-2.6.22 UDP stalls/hangs

From: Andrew Morton <akpm@...ux-foundation.org>
Date: Mon, 23 Apr 2007 15:12:40 -0700

> which is just stupid.  The rtnl_lock() is right there in ip_mc_join_group().
> And this is a different architecture and config and compiler from yesterday's
> fun.  And no scheduler patches involved here.

Perhaps something on another cpu is dropping the rtnl semaphore one
times too many.

Recently a bug of this nature was discovered in the wireless stack.
But unless you have a wireless device in this box too, it's probably
unrelated.
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