From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with ESMTP id 9EF426B008C for ; Wed, 25 Nov 2009 18:10:40 -0500 (EST) Subject: Re: lockdep complaints in slab allocator From: Matt Mackall In-Reply-To: References: <84144f020911192249l6c7fa495t1a05294c8f5b6ac8@mail.gmail.com> <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> <84144f020911241307u14cd2cf0h614827137e42378e@mail.gmail.com> <1259103315.17871.895.camel@calx> Content-Type: text/plain; charset="UTF-8" Date: Wed, 25 Nov 2009 17:06:47 -0600 Message-ID: <1259190407.2858.61.camel@calx> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: David Rientjes Cc: Pekka Enberg , Peter Zijlstra , "Paul E. McKenney" , linux-mm@kvack.org, Christoph Lameter , linux-kernel@vger.kernel.org, Nick Piggin List-ID: On Wed, 2009-11-25 at 13:59 -0800, David Rientjes wrote: > On Tue, 24 Nov 2009, Matt Mackall wrote: > > > I'm afraid I have only anecdotal reports from SLOB users, and embedded > > folks are notorious for lack of feedback, but I only need a few people > > to tell me they're shipping 100k units/mo to be confident that SLOB is > > in use in millions of devices. > > > > It's much more popular than I had expected; do you think it would be > possible to merge slob's core into another allocator or will it require > seperation forever? Probably not. It's actually a completely different kind of allocator than the rest as it doesn't actually use "slabs" at all. It's instead a slab-like interface on a traditional heap allocator. SLAB/SLUB/SLQB have much more in common - their biggest differences are about their approach to scalability/locking issues. On the upside, SLOB is easily the simplest of the bunch. -- http://selenic.com : development and support for Mercurial and Linux -- 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