linux-kernel - Re: [RESEND] [BUG] futex_unlock_pi() hurts my brain and may cause application deadlock

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Message-ID: <20070806072012.GF5359@elte.hu>
Date:	Mon, 6 Aug 2007 09:20:12 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	john stultz <johnstul@...ibm.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Sripathi Kodi <sripathik@...ibm.com>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>
Subject: Re: [RESEND] [BUG] futex_unlock_pi() hurts my brain and may cause
	application deadlock


* john stultz <johnstul@...ibm.com> wrote:

> Hey Ingo,
> 	I sent this fix for this back in the 2.6.21-rt9 era, and I thought to
> picked it up, but I think it arrived amid some futex churn and
> apparently has been dropped or was just lost.
> 
> Some of our testers have been reporting futex deadlocks and this fix 
> resolves it, so I believe it to still be needed.

hmm ... so the many rounds of pi-futex fixes from Alexey and Thomas did 
not resolve that deadlock?

	Ingo
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