From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751202AbVHQTSx (ORCPT ); Wed, 17 Aug 2005 15:18:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751215AbVHQTSw (ORCPT ); Wed, 17 Aug 2005 15:18:52 -0400 Received: from mx1.redhat.com ([66.187.233.31]:16581 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S1751202AbVHQTSw (ORCPT ); Wed, 17 Aug 2005 15:18:52 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Roland McGrath To: Chris Wright X-Fcc: ~/Mail/linus Cc: "Bhavesh P. Davda" , linux-kernel@vger.kernel.org, torvalds@osdl.org, "Glass, Kathleen K (Kathy)" , "Rhodes, James E (James)" Subject: Re: [PATCH 2.6.12.5] NPTL signal delivery deadlock fix In-Reply-To: Chris Wright's message of Wednesday, 17 August 2005 12:00:20 -0700 <20050817190020.GO7991@shell0.pdx.osdl.net> X-Antipastobozoticataclysm: Bariumenemanilow Message-Id: <20050817191836.0945E180988@magilla.sf.frob.com> Date: Wed, 17 Aug 2005 12:18:36 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > * Bhavesh P. Davda (bhavesh@avaya.com) wrote: > > This bug is quite subtle and only happens in a very interesting > > situation where a real-time threaded process is in the middle of a > > coredump when someone whacks it with a SIGKILL. However, this deadlock > > leaves the system pretty hosed and you have to reboot to recover. > > > > Not good for real-time priority-preemption applications like our > > telephony application, with 90+ real-time (SCHED_FIFO and SCHED_RR) > > processes, many of them multi-threaded, interacting with each other for > > high volume call processing. > > Nice catch, also looks like something for -stable series. Roland, any > issue with this patch? Ouch! That one must be my fault. I did a quick scan and didn't find any other typos of that nature. This fix definitely should go in everywhere ASAP. Thanks, Roland