From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Linux Kernel list <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@elte.hu>, Oleg Nesterov <oleg@tv-sign.ru>,
Arjan van de Ven <arjan@infradead.org>,
Thomas Sattler <tsattler@gmx.de>
Subject: Re: [PATCH] debug work struct cancel deadlocks with lockdep
Date: Thu, 05 Jul 2007 11:03:24 +0200 [thread overview]
Message-ID: <1183626204.7054.58.camel@twins> (raw)
In-Reply-To: <1183583529.9662.34.camel@johannes.berg>
On Wed, 2007-07-04 at 23:12 +0200, Johannes Berg wrote:
> This adds a lockdep_map for each work struct in order to debug
> deadlocks like
> my_function -> lock(); ...; cancel_work_sync(my_work)
> vs.
> run_workqueue() -> my_work.f() -> ...; lock(); ...
>
> which will deadlock if my_work.f() is invoked already but my_function()
> has acquired the lock already.
>
> Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
prev parent reply other threads:[~2007-07-05 9:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-04 21:12 [PATCH] debug work struct cancel deadlocks with lockdep Johannes Berg
2007-07-05 8:45 ` Ingo Molnar
2007-07-05 8:50 ` Johannes Berg
2007-07-05 8:54 ` Ingo Molnar
2007-07-05 8:53 ` Ingo Molnar
2007-07-05 8:58 ` Johannes Berg
2007-07-05 9:01 ` Peter Zijlstra
2007-07-05 9:08 ` Johannes Berg
2007-07-05 9:10 ` Peter Zijlstra
2007-07-05 9:19 ` Johannes Berg
2007-07-05 9:03 ` Peter Zijlstra [this message]
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