Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756587AbYGaPly (ORCPT ); Thu, 31 Jul 2008 11:41:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751710AbYGaPlq (ORCPT ); Thu, 31 Jul 2008 11:41:46 -0400 Received: from waste.org ([66.93.16.53]:60744 "EHLO waste.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751059AbYGaPlp (ORCPT ); Thu, 31 Jul 2008 11:41:45 -0400 Subject: Re: [RFC PATCH] greatly reduce SLOB external fragmentation From: Matt Mackall To: Christoph Lameter Cc: Linus Torvalds , Pekka J Enberg , Ingo Molnar , Hugh Dickins , Andi Kleen , Peter Zijlstra , Linux Kernel Mailing List , vegard.nossum@gmail.com, hannes@saeurebad.de In-Reply-To: <4891CBA9.8030203@linux-foundation.org> References: <1199314218.4497.109.camel@cinder.waste.org> <20080103085239.GA10813@elte.hu> <1199378818.8274.25.camel@cinder.waste.org> <1199419890.4608.77.camel@cinder.waste.org> <1199641910.8215.28.camel@cinder.waste.org> <1199906151.6245.57.camel@cinder.waste.org> <1199919548.6245.74.camel@cinder.waste.org> <1217466583.18911.226.camel@calx> <4891CBA9.8030203@linux-foundation.org> Content-Type: text/plain Date: Thu, 31 Jul 2008 10:38:58 -0500 Message-Id: <1217518738.3657.28.camel@calx> Mime-Version: 1.0 X-Mailer: Evolution 2.12.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 830 Lines: 22 On Thu, 2008-07-31 at 09:26 -0500, Christoph Lameter wrote: > Matt Mackall wrote: > > > Finally getting rid of SLAB is a much trickier proposition because SLUB > > still loses in a few important corner cases. > > Which corner cases? I know about the reports on the TPC issue which I > guess is a result of the avoidance of queueing in the cold free case. > It would be good to have a small C program (under an open source > license) that shows the issue. That's the one I had in mind, which I have no personal insight into. -- Mathematics is the supreme nostalgia of our time. -- 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/