Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261729AbVDKInk (ORCPT ); Mon, 11 Apr 2005 04:43:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261730AbVDKInj (ORCPT ); Mon, 11 Apr 2005 04:43:39 -0400 Received: from mx1.elte.hu ([157.181.1.137]:44264 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261729AbVDKImh (ORCPT ); Mon, 11 Apr 2005 04:42:37 -0400 Date: Mon, 11 Apr 2005 10:42:17 +0200 From: Ingo Molnar To: "Perez-Gonzalez, Inaky" Cc: Sven-Thorsten Dietrich , Daniel Walker , linux-kernel@vger.kernel.org, Steven Rostedt , Esben Nielsen , Joe Korty Subject: Re: [PATCH] Priority Lists for the RT mutex Message-ID: <20050411084217.GA9784@elte.hu> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 945 Lines: 22 * Perez-Gonzalez, Inaky wrote: > >OTOH, deadlock detection is another issue. It's quite expensive and i'm > >not sure we want to make it a runtime thing. But for fusyn's deadlock > >detection and safe teardown on owner-exit is a must-have i suspect? > > Not really. Deadlock check is needed on PI, so it can be done at the > same time (you have to walk the chain anyway). In any other case, it > is an option you can request (or not). well, i was talking about the mutex code in PREEMPT_RT. There deadlock detection is an optional debug feature. You dont _have_ to do deadlock detection for the kernel's locks, and there's a difference in performance. 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/