Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268700AbUJUJ0j (ORCPT ); Thu, 21 Oct 2004 05:26:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269056AbUJUJ0Z (ORCPT ); Thu, 21 Oct 2004 05:26:25 -0400 Received: from 213-239-205-147.clients.your-server.de ([213.239.205.147]:7331 "EHLO debian.tglx.de") by vger.kernel.org with ESMTP id S268700AbUJUJYc (ORCPT ); Thu, 21 Oct 2004 05:24:32 -0400 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8 From: Thomas Gleixner Reply-To: tglx@linutronix.de To: Rui Nuno Capela Cc: Ingo Molnar , LKML , Lee Revell , mark_h_johnson@raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Michal Schmidt , Fernando Pablo Lopez-Lezcano In-Reply-To: <30690.195.245.190.93.1098349976.squirrel@195.245.190.93> References: <20041012195424.GA3961@elte.hu> <20041013061518.GA1083@elte.hu> <20041014002433.GA19399@elte.hu> <20041014143131.GA20258@elte.hu> <20041014234202.GA26207@elte.hu> <20041015102633.GA20132@elte.hu> <20041016153344.GA16766@elte.hu> <20041018145008.GA25707@elte.hu> <20041019124605.GA28896@elte.hu> <20041019180059.GA23113@elte.hu> <20041020094508.GA29080@elte.hu> <30690.195.245.190.93.1098349976.squirrel@195.245.190.93> Content-Type: text/plain Organization: linutronix Message-Id: <1098350190.26758.24.camel@thomas> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Thu, 21 Oct 2004 11:16:30 +0200 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 623 Lines: 18 On Thu, 2004-10-21 at 11:12, Rui Nuno Capela wrote: > [] queuecommand+0x70/0x7c [usb_storage] (24) As I already pointed out, this is a problem due to up(sema) in queuecommand. That's one of the semaphore abuse points, which needs to be fixed. The problem is that semaphores are hold by Process A and released by Process B, which makes Ingo's checks trigger tglx - 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/