Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752745AbZDESj0 (ORCPT ); Sun, 5 Apr 2009 14:39:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751957AbZDESjP (ORCPT ); Sun, 5 Apr 2009 14:39:15 -0400 Received: from rv-out-0506.google.com ([209.85.198.233]:27836 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751941AbZDESjO (ORCPT ); Sun, 5 Apr 2009 14:39:14 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=VGgl748ZfxSQhw+u5WU2qrAZgFB21Qnig0GcAmHPoYyqKTamR65nbBDU2kmRL+3T3V QNeN+wbClrmYViyL+lxQKLHtwUEOCHTzdd26z7JMG+soYTrJGPLbEJKSGSYqP1/dZboJ U8M9WH2ZJjJ6i92ERF/KdmLsM+P0HU4/7nR74= MIME-Version: 1.0 In-Reply-To: References: <3efb10970904030502q1068731fl5b92f93d5341b43e@mail.gmail.com> Date: Sun, 5 Apr 2009 20:39:11 +0200 X-Google-Sender-Auth: a4aa6121b1fe30fb Message-ID: <3efb10970904051139ue3802b1ib33487418188e4bc@mail.gmail.com> Subject: Re: System deadlock on 2.6.24-rt20 (-rt27 panics on locking-api-selftests) From: Remy Bohmer To: Thomas Gleixner Cc: Steven Rostedt , Ingo Molnar , LKML , linux-rt-users Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 954 Lines: 29 Hello Thomas, >> I integrated -rt27, but this one fails on the locking api-selftests. >> Is this a bug in the selftest? Or is there a real locking bug behind >> it? > > Don't think so. The rw locks fixups which we did between -rt20 and > -rt27 might have screwed the lockdep selftests where we create > deadlock situations. This is what I hoped for ;-) (A bug in the testtooling...) > What happens if you disable the self tests ? The system boots and seems to run properly. We did not yet test for a longer period of time, but the first looks are that the hangups we had are gone now. But it would be good for the peace of mind if the locking-selftest was working properly. Thanks. Kind Regards, Remy -- 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/