Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932171AbWC1VFW (ORCPT ); Tue, 28 Mar 2006 16:05:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932180AbWC1VFW (ORCPT ); Tue, 28 Mar 2006 16:05:22 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:57768 "EHLO mx3.mail.elte.hu") by vger.kernel.org with ESMTP id S932171AbWC1VFV (ORCPT ); Tue, 28 Mar 2006 16:05:21 -0500 Date: Tue, 28 Mar 2006 23:02:48 +0200 From: Ingo Molnar To: Esben Nielsen Cc: Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: PI patch against 2.6.16-rt9 Message-ID: <20060328210248.GE1217@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-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=no SpamAssassin version=3.0.3 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: 936 Lines: 23 * Esben Nielsen wrote: > My girl friend will be angry for me not being to bed yet, but I had to > steal time to make this patch. I hope I managed to send it without > white-space damage or anything like it. thanks - this looks fine to me, but i'm still worried about the nonatomic chain boosting side-effects that i outlined in the previous mail. the tempting property of your patch is the fundamental reschedulability of the boosting itself - and the resulting simplicity of locking. On the con side, i dont see how we can detect deadlocks reliably, nor how we can avoid 'incorrect boosting' (outlined in the previous mail), if the chain gets 'broken'. 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/