From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with ESMTP id 730B46B009C for ; Tue, 24 Nov 2009 16:48:19 -0500 (EST) Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by e8.ny.us.ibm.com (8.14.3/8.13.1) with ESMTP id nAOHhvbV008483 for ; Tue, 24 Nov 2009 12:43:57 -0500 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id nAOLmFll089806 for ; Tue, 24 Nov 2009 16:48:15 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id nAOLmEaL010078 for ; Tue, 24 Nov 2009 16:48:15 -0500 Date: Tue, 24 Nov 2009 13:48:14 -0800 From: "Paul E. McKenney" Subject: Re: lockdep complaints in slab allocator Message-ID: <20091124214814.GK6831@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <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> <1259095580.4531.1788.camel@laptop> <1259096004.17871.716.camel@calx> <1259096519.4531.1809.camel@laptop> <1259097150.4531.1822.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1259097150.4531.1822.camel@laptop> Sender: owner-linux-mm@kvack.org To: Peter Zijlstra Cc: David Rientjes , Matt Mackall , Pekka Enberg , linux-mm@kvack.org, Christoph Lameter , LKML , Nick Piggin List-ID: On Tue, Nov 24, 2009 at 10:12:30PM +0100, Peter Zijlstra wrote: > On Tue, 2009-11-24 at 13:03 -0800, David Rientjes wrote: > > On Tue, 24 Nov 2009, Peter Zijlstra wrote: > > > > > Merge SLQB and rm mm/sl[ua]b.c include/linux/sl[ua]b.h for .33-rc1 > > > > > > > slqb still has a 5-10% performance regression compared to slab for > > benchmarks such as netperf TCP_RR on machines with high cpu counts, > > forcing that type of regression isn't acceptable. > > Having _4_ slab allocators is equally unacceptable. I completely agree. We need at least ten. ;-) Thanx, Paul -- 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