Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932686AbVKBNK5 (ORCPT ); Wed, 2 Nov 2005 08:10:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932699AbVKBNK5 (ORCPT ); Wed, 2 Nov 2005 08:10:57 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:50138 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S932686AbVKBNK5 (ORCPT ); Wed, 2 Nov 2005 08:10:57 -0500 Date: Wed, 2 Nov 2005 14:11:00 +0100 From: Ingo Molnar To: "Paul E. McKenney" Cc: linux-kernel@vger.kernel.org, akpm@osdl.org, oleg@tv-sign.ru Subject: Re: [PATCH] Fix SIGSTOP locking issue in -rt Message-ID: <20051102131100.GA11621@elte.hu> References: <20051101195857.GA7098@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051101195857.GA7098@us.ibm.com> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=AWL autolearn=disabled SpamAssassin version=3.0.4 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 733 Lines: 20 * Paul E. McKenney wrote: > Hello! > > The following patch fixes a locking issue in -rt signals, where the > job-control signals drop sighand_lock momentarily during signal > handling. This interacts badly with the RCU-ification of unicast > signal delivery. The fix is simply to acquire tasklist_lock for > job-control signals, since these typically do not have stringent > scalability or latency requirements. thanks, applied - will show up in -rt3. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/