linux-kernel - Re: 2.6.24-rc6: possible recursive locking detected

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Message-ID: <Pine.LNX.4.64.0801071334340.2508@alien.or.mcafeemobile.com>
Date:	Mon, 7 Jan 2008 13:35:52 -0800 (PST)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Christian Kujau <lists@...dbynature.de>
cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Ingo Molnar <mingo@...e.hu>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	jfs-discussion@...ts.sourceforge.net,
	Johannes Berg <johannes@...solutions.net>,
	Oleg Nesterov <oleg@...sign.ru>
Subject: Re: 2.6.24-rc6: possible recursive locking detected

On Sun, 6 Jan 2008, Christian Kujau wrote:

> On Sat, 5 Jan 2008, Davide Libenzi wrote:
> > A solution may be to move the call to ep_poll_safewake() (that'd become a
> > simple wake_up()) inside a tasklet or whatever is today trendy for delayed
> > work. But his kinda scares me to be honest, since epoll has already a
> > bunch of places where it could be asynchronously hit (plus performance
> > regression will need to be verified).
> 
> Although I'm not able to reproduce this one right now, I'm happy to test any
> patches you guys come up with.

There's no need to reproduce it. It's there, it's among us ;)



- Davide


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