Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S939029AbZDJRSG (ORCPT ); Fri, 10 Apr 2009 13:18:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S938988AbZDJRRS (ORCPT ); Fri, 10 Apr 2009 13:17:18 -0400 Received: from www.tglx.de ([62.245.132.106]:46841 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938979AbZDJRRQ (ORCPT ); Fri, 10 Apr 2009 13:17:16 -0400 Date: Fri, 10 Apr 2009 19:16:30 +0200 (CEST) From: Thomas Gleixner To: Maciej Rutecki cc: Andrew Morton , Linux Kernel Mailing List , linux-bluetooth@vger.kernel.org, marcel@holtmann.org Subject: Re: [2.6.29-git12] BUG: scheduling while atomic: swapper/0/0x10000100 In-Reply-To: <8db1092f0904100952x64048907gea6bbaf25488de26@mail.gmail.com> Message-ID: References: <8db1092f0904070037q426fd8dcx4aa48c70e40b5d6c@mail.gmail.com> <20090409212028.7b2aa88c.akpm@linux-foundation.org> <8db1092f0904100340g7b7eb310y805e8680a32e3ac8@mail.gmail.com> <8db1092f0904100747w297a0daas9ebd05486d06e706@mail.gmail.com> <8db1092f0904100952x64048907gea6bbaf25488de26@mail.gmail.com> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1434 Lines: 50 On Fri, 10 Apr 2009, Maciej Rutecki wrote: > 2009/4/10 Thomas Gleixner : > > > > > Is this with my patch applied ? > > Yes. I didn't observe any change. Hmm. Ok, so the check in do_IRQ did not trigger. That means we need to look for some other place. Can you please apply the patch below and set CONFIG_FUNCTION_TRACER=y. After boot please do as root: # mount -t debugfs debugfs /sys/kernel/debug # echo function >/sys/kernel/debug/tracing/current_tracer # ech0 1 >/sys/kernel/debug/tracing/options/latency-format # echo 1 >/sys/kernel/debug/tracing/tracing_enabled Now wait until that scheduling while atomic bug triggers. This will stop the tracer. Now # cat /sys/kernel/debug/tracing/trace | bzip2 >/tmp/trace.bz2 Please upload trace.bz2 file to some place. Thanks, tglx ---- diff --git a/kernel/sched.c b/kernel/sched.c index 5724508..2e257bf 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4912,6 +4912,7 @@ static noinline void __schedule_bug(struct task_struct *prev) { struct pt_regs *regs = get_irq_regs(); + tracing_off(); printk(KERN_ERR "BUG: scheduling while atomic: %s/%d/0x%08x\n", prev->comm, prev->pid, preempt_count()); -- 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/