From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752957AbaCJINr (ORCPT ); Mon, 10 Mar 2014 04:13:47 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:23876 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752470AbaCJINS (ORCPT ); Mon, 10 Mar 2014 04:13:18 -0400 X-IronPort-AV: E=Sophos;i="4.97,622,1389715200"; d="scan'208";a="9670974" From: Tang Chen To: viro@zeniv.linux.org.uk, bcrl@kvack.org, jmoyer@redhat.com, kosaki.motohiro@gmail.com, kosaki.motohiro@jp.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com Cc: guz.fnst@cn.fujitsu.com, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, linux-kernel@vger.kernel.org, miaox@cn.fujitsu.com Subject: [RESEND v2 PATCH 0/2] Bug fix in aio ring page migration Date: Mon, 10 Mar 2014 16:15:32 +0800 Message-Id: <1394439334-28523-1-git-send-email-tangchen@cn.fujitsu.com> X-Mailer: git-send-email 1.7.11.7 X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2014/03/10 16:10:03, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2014/03/10 16:10:11, Serialize complete at 2014/03/10 16:10:11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch-set fixes the following two problems: 1. Need to use ctx->completion_lock to protect ring pages from being mis-written while migration. 2. Need memory barrier to ensure memory copy is done before ctx->ring_pages[] is updated. NOTE: AIO ring page migration was implemented since Linux 3.12. So we need to merge these two patches into 3.12 stable tree. Tang Chen (2): aio, memory-hotplug: Fix confliction when migrating and accessing ring pages. aio, mem-hotplug: Add memory barrier to aio ring page migration. fs/aio.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 42 insertions(+), 0 deletions(-) -- 1.7.7