Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754070AbZLVT1m (ORCPT ); Tue, 22 Dec 2009 14:27:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751372AbZLVT1j (ORCPT ); Tue, 22 Dec 2009 14:27:39 -0500 Received: from bombadil.infradead.org ([18.85.46.34]:45822 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751142AbZLVT1j (ORCPT ); Tue, 22 Dec 2009 14:27:39 -0500 Subject: Re: WARN_ON at line 380 in kernel/smp.c under 2.6.32.2 + TuxOnIce + KDB From: Peter Zijlstra To: Pedro Ribeiro Cc: linux-kernel@vger.kernel.org, Nigel Cunningham In-Reply-To: <74fd948d0912221116l477a8a71w1feadc1341fc6e21@mail.gmail.com> References: <74fd948d0912220851v354b1704xa55fc3c88e1c300c@mail.gmail.com> <1261502431.4937.38.camel@laptop> <74fd948d0912221116l477a8a71w1feadc1341fc6e21@mail.gmail.com> Content-Type: text/plain; charset="UTF-8" Date: Tue, 22 Dec 2009 20:27:00 +0100 Message-ID: <1261510020.4937.73.camel@laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 927 Lines: 22 On Tue, 2009-12-22 at 19:16 +0000, Pedro Ribeiro wrote: > On Tue, Dec 22, 2009 at 5:20 PM, Peter Zijlstra wrote: > > If you'd enable frame pointers the strack traces would be clearer, but > > it looks like a bug in tux on ice, doing kmap_high() with IRQs disabled > > or something like that. > I enabled frame pointers, is this more useful? > http://img684.imageshack.us/img684/5118/dsc01206m.jpg > http://img96.imageshack.us/img96/5493/dsc01207k.jpg > http://img33.imageshack.us/img33/7470/dsc01208lp.jpg Those read more clearly indeed, thanks! It really looks like what I said above, in that tux on ice is calling kmap() from an inappropriate context. -- 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/