From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759725AbXHABlj (ORCPT ); Tue, 31 Jul 2007 21:41:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761321AbXHABlU (ORCPT ); Tue, 31 Jul 2007 21:41:20 -0400 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:48838 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1760998AbXHABlS (ORCPT ); Tue, 31 Jul 2007 21:41:18 -0400 Date: Tue, 31 Jul 2007 18:41:19 -0700 (PDT) Message-Id: <20070731.184119.41636411.davem@davemloft.net> To: johnstul@us.ibm.com Cc: mingo@elte.hu, linux-kernel@vger.kernel.org, tglx@linutronix.de, rostedt@goodmis.org, sripathik@in.ibm.com Subject: Re: [RESEND] [BUG] futex_unlock_pi() hurts my brain and may cause application deadlock From: David Miller In-Reply-To: <1185926019.8850.198.camel@localhost> References: <1180572567.6126.44.camel@localhost.localdomain> <1185926019.8850.198.camel@localhost> X-Mailer: Mew version 5.1.52 on Emacs 21.4 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: john stultz Date: Tue, 31 Jul 2007 16:53:39 -0700 > 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. This bug seems to exist in mainline too. Sparc users have been seeing something that smells like this bug, I will ask them to test this fix out.