Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758159Ab2BXVpg (ORCPT ); Fri, 24 Feb 2012 16:45:36 -0500 Received: from mail-pw0-f46.google.com ([209.85.160.46]:64217 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754766Ab2BXVpf (ORCPT ); Fri, 24 Feb 2012 16:45:35 -0500 Authentication-Results: mr.google.com; spf=pass (google.com: domain of rientjes@google.com designates 10.68.218.228 as permitted sender) smtp.mail=rientjes@google.com; dkim=pass header.i=rientjes@google.com Date: Fri, 24 Feb 2012 13:45:32 -0800 (PST) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Josef Bacik cc: Rafael Aquini , linux-mm@kvack.org, Randy Dunlap , Christoph Lameter , Pekka Enberg , Matt Mackall , Rik van Riel , linux-kernel@vger.kernel.org Subject: Re: [PATCH] oom: add sysctl to enable slab memory dump In-Reply-To: <20120224151025.GA1848@localhost.localdomain> Message-ID: References: <20120222115320.GA3107@x61.redhat.com> <20120223150238.GA15427@dhcp231-144.rdu.redhat.com> <20120224151025.GA1848@localhost.localdomain> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 967 Lines: 19 On Fri, 24 Feb 2012, Josef Bacik wrote: > Um well yeah, I'm rewriting a chunk of btrfs which was rapantly leaking memory > so the OOM just couldn't keep up with how much I was sucking down. This is > strictly a developer is doing something stupid and needs help pointing out what > it is sort of moment, not a day to day OOM. > If you're debugging new kernel code and you realize that excessive amount of memory is being consumed so that nothing can even fork, you may want to try cat /proc/slabinfo before you get into that condition the next time around, although I already suspect that you know the cache you're leaking. It doesn't mean we need to add hundreds of lines of code to the kernel. Try kmemleak. -- 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/