netdev - Re: [PATCH] net: deadlock during net device unregistration

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Message-Id: <20080930.065852.116510157.davem@davemloft.net>
Date:	Tue, 30 Sep 2008 06:58:52 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	benjamin.thery@...l.net
Cc:	jarkao2@...il.com, netdev@...r.kernel.org, dlezcano@...ibm.com,
	dada1@...mobay.com
Subject: Re: [PATCH] net: deadlock during net device unregistration

From: Benjamin Thery <benjamin.thery@...l.net>
Date: Tue, 30 Sep 2008 13:52:31 +0200

> BTW, in the past (last year) dst_gc_task() was run as a timer
> handler and this situation (deadlock with linkwatch_event())
> couldn't occur.

September 12th to be exact :-)  That's when Eric Dumazet's
change went in:

commit 86bba269d08f0c545ae76c90b56727f65d62d57f
Author: Eric Dumazet <dada1@...mosbay.com>
Date:   Wed Sep 12 14:29:01 2007 +0200

    [PATCH] NET : convert IP route cache garbage collection from softirq processing to a workqueue


But this change went into 2.6.24, so I wonder why it's taken
so long to hit this.
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