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 F3F5C6B0078 for ; Mon, 23 Nov 2009 16:02:17 -0500 (EST) Subject: Re: lockdep complaints in slab allocator From: Matt Mackall In-Reply-To: <1259006475.15619.16.camel@penberg-laptop> References: <20091118181202.GA12180@linux.vnet.ibm.com> <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> <1259005814.15619.14.camel@penberg-laptop> <1259006475.15619.16.camel@penberg-laptop> Content-Type: text/plain; charset="UTF-8" Date: Mon, 23 Nov 2009 15:01:57 -0600 Message-ID: <1259010117.17871.473.camel@calx> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Pekka Enberg Cc: Christoph Lameter , Peter Zijlstra , paulmck@linux.vnet.ibm.com, linux-mm@kvack.org, LKML , Nick Piggin List-ID: On Mon, 2009-11-23 at 22:01 +0200, Pekka Enberg wrote: > On Mon, 2009-11-23 at 21:50 +0200, Pekka Enberg wrote: > > On Mon, 23 Nov 2009, Pekka Enberg wrote: > > > > That turns out to be _very_ hard. How about something like the following > > > > untested patch which delays slab_destroy() while we're under nc->lock. > > > > On Mon, 2009-11-23 at 13:30 -0600, Christoph Lameter wrote: > > > Code changes to deal with a diagnostic issue? > > > > OK, fair enough. If I suffer permanent brain damage from staring at the > > SLAB code for too long, I hope you and Matt will chip in to pay for my > > medication. You Europeans and your droll health care jokes. > Maybe something like this untested patch fixes the issue... This looks like a much better approach. -- 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