Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755163AbZG0AY4 (ORCPT ); Sun, 26 Jul 2009 20:24:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755119AbZG0AY4 (ORCPT ); Sun, 26 Jul 2009 20:24:56 -0400 Received: from smtp-out.google.com ([216.239.45.13]:46957 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755095AbZG0AYz (ORCPT ); Sun, 26 Jul 2009 20:24:55 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=date:from:x-x-sender:to:cc:subject:in-reply-to:message-id: references:user-agent:mime-version:content-type:x-system-of-record; b=ePRrDrkE8oB+S9tLNF3jtDPzBmu/n8HoYQuQWXyDfTgqJvRCnK8ewIgcP1ICMkSBP hWnTGQB7BLeJJSAAYCf5w== Date: Sun, 26 Jul 2009 17:24:44 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Larry Finger cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Johannes Berg , Pekka Enberg Subject: Re: [Bug #13319] Page allocation failures with b43 and p54usb In-Reply-To: <4A6CF220.7080605@lwfinger.net> Message-ID: References: <4A6CF220.7080605@lwfinger.net> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1946 Lines: 42 On Sun, 26 Jul 2009, Larry Finger wrote: > Rafael J. Wysocki wrote: > > This message has been generated automatically as a part of a report > > of regressions introduced between 2.6.29 and 2.6.30. > > > > The following bug entry is on the current list of known regressions > > introduced between 2.6.29 and 2.6.30. 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 (89 days old) > > References : http://marc.info/?l=linux-kernel&m=124103897101088&w=4 > > http://lkml.org/lkml/2009/6/7/136 > > Handled-By : Johannes Berg > > This bug was fixed by commit 781b2ba6eb5f22440afac9c79a89ebd6e3674a60 > entitled "SLUB: Out-of-memory diagnostics" by Pekka Enberg > and dated Wed Jun 10 18:50:32 2009 +0300. > Hmm, I'm remembering differently. I thought the root problem here has only been fixed in Pekka's slab-2.6.git tree with "slub: add option to disable higher order debugging slabs" and isn't currently in Linus' tree. > The fault occurred because when CONFIG_SLUB_DEBUG was set, many of the > memory allocations for wireless buffers were increased from O(0) to > O(1) causing memory fragmentation, and eventually there were no > remaining O(1) fragments. This problem is unlikely to affect most > users as none of the distos turn on the above debug option. > It only happens when CONFIG_SLUB_DEBUG_ON is enabled for caches with sizes that increase as the result of the added metadata. -- 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/