From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 7 May 2008 10:59:48 -0500 From: Robin Holt Subject: Re: [PATCH 02 of 11] get_task_mm Message-ID: <20080507155948.GO18857@sgi.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Andrea Arcangeli Cc: Andrew Morton , Christoph Lameter , Jack Steiner , Robin Holt , Nick Piggin , Peter Zijlstra , kvm-devel@lists.sourceforge.net, Kanoj Sarcar , Roland Dreier , Steve Wise , linux-kernel@vger.kernel.org, Avi Kivity , linux-mm@kvack.org, general@lists.openfabrics.org, Hugh Dickins , Rusty Russell , Anthony Liguori , Chris Wright , Marcelo Tosatti , Eric Dumazet , "Paul E. McKenney" List-ID: You can drop this patch. This turned out to be a race in xpmem. It "appeared" as if it were a race in get_task_mm, but it really is not. The current->mm field is cleared under the task_lock and the task_lock is grabbed by get_task_mm. I have been testing you v15 version without this patch and not encountere the problem again (now that I fixed my xpmem race). Thanks, Robin On Wed, May 07, 2008 at 04:35:52PM +0200, Andrea Arcangeli wrote: > # HG changeset patch > # User Andrea Arcangeli > # Date 1210115127 -7200 > # Node ID c5badbefeee07518d9d1acca13e94c981420317c > # Parent e20917dcc8284b6a07cfcced13dda4cbca850a9c > get_task_mm -- 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