From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx186.postini.com [74.125.245.186]) by kanga.kvack.org (Postfix) with SMTP id 33A726B0062 for ; Fri, 8 Jun 2012 17:19:47 -0400 (EDT) Date: Fri, 8 Jun 2012 14:19:45 -0700 From: Andrew Morton Subject: Re: [Resend PATCH v2] mm: Fix slab->page _count corruption. Message-Id: <20120608141945.4df63d95.akpm@linux-foundation.org> In-Reply-To: References: <1338405610-1788-1-git-send-email-pshelar@nicira.com> <20120608131045.90708bda.akpm@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Pravin Shelar Cc: Christoph Lameter , penberg@kernel.org, aarcange@redhat.com, linux-mm@kvack.org, abhide@nicira.com On Fri, 8 Jun 2012 13:23:56 -0700 Pravin Shelar wrote: > On Fri, Jun 8, 2012 at 1:15 PM, Christoph Lameter wrote: > > On Fri, 8 Jun 2012, Andrew Morton wrote: > > > >> OK. __I assume this bug has been there for quite some time. > > > > Well the huge pages refcount tricks caused the issue. > > > >> How serious is it? __Have people been reporting it in real workloads? > >> How to trigger it? __IOW, does this need -stable backporting? > > > > Possibly. > > If this patch is getting back-ported then we shld also do same for > 5bf5f03c271907978 (mm: fix slab->page flags corruption) which fixes > other issue related to slub and huge page sharing. Well I don't know if either are getting backported yet. To decide that we would have to understand the end-user impact of the bug(s). Please tell us? -- 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