From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762086AbXHFHVd (ORCPT ); Mon, 6 Aug 2007 03:21:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757302AbXHFHVX (ORCPT ); Mon, 6 Aug 2007 03:21:23 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:55902 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757512AbXHFHVV (ORCPT ); Mon, 6 Aug 2007 03:21:21 -0400 Date: Mon, 6 Aug 2007 09:20:12 +0200 From: Ingo Molnar To: john stultz Cc: lkml , Thomas Gleixner , Steven Rostedt , Sripathi Kodi , Alexey Kuznetsov Subject: Re: [RESEND] [BUG] futex_unlock_pi() hurts my brain and may cause application deadlock Message-ID: <20070806072012.GF5359@elte.hu> References: <1180572567.6126.44.camel@localhost.localdomain> <1185926019.8850.198.camel@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1185926019.8850.198.camel@localhost> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7-deb -1.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * john stultz 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