From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933182Ab0JRTl0 (ORCPT ); Mon, 18 Oct 2010 15:41:26 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:41050 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933159Ab0JRTlZ (ORCPT ); Mon, 18 Oct 2010 15:41:25 -0400 Date: Mon, 18 Oct 2010 12:40:55 -0700 From: Andrew Morton To: Robin Holt Cc: linux-kernel@vger.kernel.org Subject: Re: [Patch] Incoming XPC channel messages can come in after the channel's partition structures have been torn down. Message-Id: <20101018124055.26325ea5.akpm@linux-foundation.org> In-Reply-To: <20101018133508.GC14064@sgi.com> References: <20101018133508.GC14064@sgi.com> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.9; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 18 Oct 2010 08:35:08 -0500 Robin Holt wrote: > Under some workloads, some channel messages have been observed being > delayed on the sending side past the point where the receiving side > has been able to tear down its partition structures. This condition is > already detected in xpc_handle_activate_IRQ_uv(), but that information > is not given to xpc_handle_activate_mq_msg_uv(). As a result, > xpc_handle_activate_mq_msg_uv() assumes the structures still exist and > references them. With what result? Machine goes boom? Would you consider this a 2.6.36 fix? Backport to -stable?