linux-kernel - Re: 2.6.24-rc2-mm1: kcryptd vs lockdep

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Date:	Sat, 24 Nov 2007 03:49:07 +0000
From:	Alasdair G Kergon <agk@...hat.com>
To:	Torsten Kaiser <just.for.lkml@...glemail.com>
Cc:	Milan Broz <mbroz@...hat.com>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.24-rc2-mm1: kcryptd vs lockdep

On Fri, Nov 23, 2007 at 11:42:36PM +0100, Torsten Kaiser wrote:
> ... or I just don't see the bug.

See my earlier post in this thread: there's a race in the write loop
where a work struct could be used twice on the same queue.
(Needs data structure change to fix that, which nobody has attempted
to do yet.)

BTW To eliminate any internal lockdep concerns (and people say there
should be no problem) temporarily add a second struct instead of reusing
one on two queues.

Alasdair
-- 
agk@...hat.com
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