From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx148.postini.com [74.125.245.148]) by kanga.kvack.org (Postfix) with SMTP id 5DA116B0062 for ; Fri, 8 Jun 2012 16:32:28 -0400 (EDT) Date: Fri, 8 Jun 2012 13:32:26 -0700 From: Andrew Morton Subject: Re: [Resend PATCH v2] mm: Fix slab->page _count corruption. Message-Id: <20120608133226.cd9a1167.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: Christoph Lameter Cc: Pravin B Shelar , penberg@kernel.org, aarcange@redhat.com, linux-mm@kvack.org, abhide@nicira.com On Fri, 8 Jun 2012 15:15:50 -0500 (CDT) 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. that was all admirably indecisive. > > Also, someone forgot to document these: > > > > struct { > > unsigned inuse:16; > > unsigned objects:15; > > unsigned frozen:1; > > }; > > So far I thouight that the field names are pretty clear on their own. Kidding? I had to grep the tree just to find out which subsystem owns these. -- 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