Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751421AbVKYH6q (ORCPT ); Fri, 25 Nov 2005 02:58:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751422AbVKYH6q (ORCPT ); Fri, 25 Nov 2005 02:58:46 -0500 Received: from e5.ny.us.ibm.com ([32.97.182.145]:11941 "EHLO e5.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1751421AbVKYH6o (ORCPT ); Fri, 25 Nov 2005 02:58:44 -0500 Date: Fri, 25 Nov 2005 13:34:37 +0530 From: Dinakar Guniguntala To: david singleton Cc: "David F. Carlson" , linux-kernel@vger.kernel.org, Ingo Molnar Subject: Re: PI BUG with -rt13 Message-ID: <20051125080437.GA4844@in.ibm.com> Reply-To: dino@in.ibm.com References: <8311ADE9-5855-11DA-BBAB-000A959BB91E@mvista.com> <20051118174454.GA2793@elte.hu> <43822480.6080301@mvista.com> <20051121212653.GA6143@elte.hu> <20051124145734.GA2717@elte.hu> <20051124202637.GB9098@in.ibm.com> <20051124203250.GA9086@in.ibm.com> <20051125073423.GA4825@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20051125073423.GA4825@in.ibm.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1520 Lines: 35 On Fri, Nov 25, 2005 at 01:04:23PM +0530, Dinakar Guniguntala wrote: > On Thu, Nov 24, 2005 at 08:56:06PM -0800, david singleton wrote: > > On Nov 24, 2005, at 12:32 PM, Dinakar Guniguntala wrote: > > > > >>I just noticed with the above fix, Paul's testcase completely > > >>hangs up and when killed I hit the BUG mentioned below. > > >>Till -rt13, this testcase just ran to completion > > > > > >Forgot to mention that I notice the same failure with -rt15 as well > > > > Good news and bad news. > > Good news. This test doesn't exercise the robust futex code. > > Pthread mutexes that want priority queuing, priority inheritance and/or > > robustness must have either the robust (PTHREAD_MUTEX_ROBUST_NP) > > attribute set and/or the PTHREAD_PRIO_INHERIT attribute set at mutex > > creation time. > > Davi, Thank you for looking into this > > Yes, this particular testcase does not exercise the robust futex code. > However, the testcase only hangs when I apply your fix on top of > -rt13. A Vanilla -rt13 works fine Just to make myself clear, this is not the same testcase where I saw PI issues that I reported ealier in the thread. I guess since I reported both problems in the same thread, it is sort of confusing. Hope that clears up any confusion -Dinakar - 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/