Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754266AbZFGNkj (ORCPT ); Sun, 7 Jun 2009 09:40:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752803AbZFGNk0 (ORCPT ); Sun, 7 Jun 2009 09:40:26 -0400 Received: from mail-bw0-f213.google.com ([209.85.218.213]:40516 "EHLO mail-bw0-f213.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753771AbZFGNkY convert rfc822-to-8bit (ORCPT ); Sun, 7 Jun 2009 09:40:24 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=v0cRojwqS4Z+8EidlTIGks3JIN/WuOmV6XurydmuF4alsI/NAfcMg3F0vecUtpRUsg Kfq5QmWYIJht73mVtkBunk92t96QSzTLUIiARZ8QGeou2B0l6ECO8G2fxQ2WZXK3PQsp shgvzKSGKoKVrf3DYgFNXw/+GUXkpZXatDLS8= MIME-Version: 1.0 In-Reply-To: <4A2BBC30.2030300@lwfinger.net> References: <4A2BBC30.2030300@lwfinger.net> Date: Sun, 7 Jun 2009 16:40:24 +0300 X-Google-Sender-Auth: 322b7548213da9ad Message-ID: <84144f020906070640rf5ab14nbf66d3ca7c97675f@mail.gmail.com> Subject: Re: [Bug #13319] Page allocation failures with b43 and p54usb From: Pekka Enberg To: Larry Finger Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Johannes Berg , Andrew Morton , Rik van Riel , KOSAKI Motohiro , KAMEZAWA Hiroyuki , hugh@veritas.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1989 Lines: 42 Hi Larry, On Sun, Jun 7, 2009 at 4:10 PM, Larry Finger wrote: > Rafael J. Wysocki wrote: >> This message has been generated automatically as a part of a report >> of recent regressions. >> >> The following bug entry is on the current list of known regressions >> from 2.6.29. ?Please verify if it still should be listed and let me know >> (either way). >> >> >> Bug-Entry ? ? : http://bugzilla.kernel.org/show_bug.cgi?id=13319 >> Subject ? ? ? ? ? ? ? : Page allocation failures with b43 and p54usb >> Submitter ? ? : Larry Finger >> Date ? ? ? ? ?: 2009-04-29 21:01 (40 days old) >> References ? ?: http://marc.info/?l=linux-kernel&m=124103897101088&w=4 >> Handled-By ? ?: Johannes Berg > > This bug is extremely difficult to pin down. I cannot reproduce it at > will. The system has to be up for a long time, which is difficult with > testing the late RC's of 2.6.30 and the code in wireless-testing so > that new bugs don't end up in 2.6.31-RCX. That said, it still was in > 2.6.30-RC6 and I'm not aware of any changes since that would fix it. > > My operating kernel is patched with additional diagnostics to help me > understand why a kmalloc request for a buffer of 1390 bytes suddenly > ends up as an O(1) request. Unfortunately, I don't have any answers. Looking at the out-of-memory trace, there's still memory available but the pskb_expand_head() allocation is GFP_ATOMIC so there's not much the page allocator can do here. The amount of memory consumed by inactive_file is pretty high so maybe the problem is related to the recent mm/vmscan.c changes. Lets copy some more mm developers and see if they can help out. 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/