From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 7B8106B0044 for ; Tue, 24 Nov 2009 15:46:26 -0500 (EST) Subject: Re: lockdep complaints in slab allocator From: Peter Zijlstra In-Reply-To: <1259090615.17871.696.camel@calx> References: <84144f020911192249l6c7fa495t1a05294c8f5b6ac8@mail.gmail.com> <1258709153.11284.429.camel@laptop> <84144f020911200238w3d3ecb38k92ca595beee31de5@mail.gmail.com> <1258714328.11284.522.camel@laptop> <4B067816.6070304@cs.helsinki.fi> <1258729748.4104.223.camel@laptop> <1259002800.5630.1.camel@penberg-laptop> <1259003425.17871.328.camel@calx> <4B0ADEF5.9040001@cs.helsinki.fi> <1259080406.4531.1645.camel@laptop> <20091124170032.GC6831@linux.vnet.ibm.com> <1259082756.17871.607.camel@calx> <1259086459.4531.1752.camel@laptop> <1259090615.17871.696.camel@calx> Content-Type: text/plain; charset="UTF-8" Date: Tue, 24 Nov 2009 21:46:20 +0100 Message-ID: <1259095580.4531.1788.camel@laptop> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Matt Mackall Cc: paulmck@linux.vnet.ibm.com, Pekka Enberg , linux-mm@kvack.org, cl@linux-foundation.org, LKML , Nick Piggin List-ID: On Tue, 2009-11-24 at 13:23 -0600, Matt Mackall wrote: > My understanding of the current state of play is: > > SLUB: default allocator > SLAB: deep maintenance, will be removed if SLUB ever covers remaining > performance regressions > SLOB: useful for low-end (but high-volume!) embedded > SLQB: sitting in slab.git#for-next for months, has some ground to cover > > SLQB and SLUB have pretty similar target audiences, so I agree we should > eventually have only one of them. But I strongly expect performance > results to be mixed, just as they have been comparing SLUB/SLAB. > Similarly, SLQB still has of room for tuning left compared to SLUB, as > SLUB did compared to SLAB when it first emerged. It might be a while > before a clear winner emerges. And as long as we drag out this madness nothing will change I suspect. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org