Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268682AbUJPIRd (ORCPT ); Sat, 16 Oct 2004 04:17:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268683AbUJPIRd (ORCPT ); Sat, 16 Oct 2004 04:17:33 -0400 Received: from mx1.elte.hu ([157.181.1.137]:44457 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S268682AbUJPIRb (ORCPT ); Sat, 16 Oct 2004 04:17:31 -0400 Date: Sat, 16 Oct 2004 10:18:56 +0200 From: Ingo Molnar To: Adam Heath Cc: linux-kernel@vger.kernel.org Subject: Re: [patch] Real-Time Preemption, -VP-2.6.9-rc4-mm1-U3 Message-ID: <20041016081856.GA942@elte.hu> References: <20041012091501.GA18562@elte.hu> <20041012123318.GA2102@elte.hu> <20041012195424.GA3961@elte.hu> <20041013061518.GA1083@elte.hu> <20041014002433.GA19399@elte.hu> <20041014143131.GA20258@elte.hu> <20041014234202.GA26207@elte.hu> <20041015102633.GA20132@elte.hu> <20041016075635.GA462@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041016075635.GA462@elte.hu> User-Agent: Mutt/1.4.1i 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: 799 Lines: 21 * Ingo Molnar wrote: > a suggestion for future testing: please enable PREEMPT_TIMING for the > next kernels you build, it will print such entries at the end of > stacktraces: > > preempt count: 2 > entry 1: cpu_idle+0x38/0x90 / (start_kernel+0x1ac/0x1f0) > entry 2: _spin_lock+0x22/0x80 / (timer_interrupt+0x1b/0x130) correction: in -U3 you'll also need to enable LATENCY_TRACE for this to work. I've fixed this in my tree and from -U4 onwards the preemption trace will be maintained and printed if DEBUG_PREEMPT is enabled. 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/