linux-kernel - Re: [PATCH] printk deadlocks if called with runqueue lock held

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Message-ID: <20080124090048.GB10217@elf.ucw.cz>
Date:	Thu, 24 Jan 2008 10:00:49 +0100
From:	Pavel Machek <pavel@....cz>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...nvz.org>,
	Kirill Korotaev <dev@...ru>
Subject: Re: [PATCH] printk deadlocks if called with runqueue lock held

On Wed 2008-01-23 13:36:12, Steven Rostedt wrote:
> 
> 
> On Wed, 23 Jan 2008, Pavel Machek wrote:
> >
> > Could try_to_wakeup use trylock, and only avoid wakeup if lock is
> > already held?
> > 							Pavel
> 
> I could imagine a lot of missed wakeups caused by that.

...alternative being suggested is to miss _all_ the wakeups. So
"missing some" seems like better alternative.

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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