From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx123.postini.com [74.125.245.123]) by kanga.kvack.org (Postfix) with SMTP id A43DA6B0044 for ; Thu, 15 Mar 2012 13:16:36 -0400 (EDT) Date: Thu, 15 Mar 2012 13:16:28 -0400 From: Dave Jones Subject: Re: [PATCH] mm: thp: fix pmd_bad() triggering in code paths holding mmap_sem read mode Message-ID: <20120315171627.GB22255@redhat.com> References: <1331822671-21508-1-git-send-email-aarcange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1331822671-21508-1-git-send-email-aarcange@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: linux-mm@kvack.org, Andrew Morton , Johannes Weiner , Mel Gorman , Hugh Dickins , Larry Woodman , Rik van Riel , Ulrich Obergfell On Thu, Mar 15, 2012 at 03:44:31PM +0100, Andrea Arcangeli wrote: > At some point prior to the panic, a "bad pmd ..." message similar to the > following is logged on the console: > > mm/memory.c:145: bad pmd ffff8800376e1f98(80000000314000e7). Hmm, I wonder if this could explain some of the many bad page state bug reports we've seen in Fedora recently. (See my recent mail to linux-mm) > Reported-by: Ulrich Obergfell > Signed-off-by: Andrea Arcangeli Should probably go to stable too ? How far back does this bug go ? Dave -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org