Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755232AbZIJISn (ORCPT ); Thu, 10 Sep 2009 04:18:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752368AbZIJISm (ORCPT ); Thu, 10 Sep 2009 04:18:42 -0400 Received: from courier.cs.helsinki.fi ([128.214.9.1]:57748 "EHLO mail.cs.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752034AbZIJISl (ORCPT ); Thu, 10 Sep 2009 04:18:41 -0400 Subject: Re: iwlagn: order 2 page allocation failures From: Pekka Enberg To: Mel Gorman Cc: Frans Pop , Larry Finger , "John W. Linville" , linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, ipw3945-devel@lists.sourceforge.net, Andrew Morton , cl@linux-foundation.org, Assaf Krauss , Johannes Berg , Mohamed Abbas In-Reply-To: <20090909165545.GK24614@csn.ul.ie> References: <200909060941.01810.elendil@planet.nl> <4AA67139.80301@lwfinger.net> <20090909150418.GI24614@csn.ul.ie> <200909091759.33655.elendil@planet.nl> <20090909165545.GK24614@csn.ul.ie> Date: Thu, 10 Sep 2009 11:18:42 +0300 Message-Id: <1252570722.4876.23.camel@penberg-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7bit X-Mailer: Evolution 2.24.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1317 Lines: 34 On Wed, 2009-09-09 at 17:55 +0100, Mel Gorman wrote: > On Wed, Sep 09, 2009 at 05:59:30PM +0200, Frans Pop wrote: > > On Wednesday 09 September 2009, Mel Gorman wrote: > > > Franz, in the full dmesg was there any mention of "SLUB: Unable to > > > allocate memory on node"? > > > > No, nothing at all. I double checked the kernel log, but it was completely > > quiet in the hours before and after the messages I already posted. > > > > Ok, that in itself is unexpected. > > Pekka, it looks from the stack trace that the failure is from > __alloc_skb and I am guessing the failure path is around here > > size = SKB_DATA_ALIGN(size); > data = kmalloc_node_track_caller(size + sizeof(struct skb_shared_info), > gfp_mask, node); > if (!data) > goto nodata; > > Why would the SLUB out-of-memory message not appear? It's hardly > tripping up on printk_ratelimit() is it? That's because it's a large allocation that's passed directly to the page allocator. See kmalloc_large_node(), for example. Pekka -- 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/