From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gu Zheng Subject: Re: [RESEND v2 PATCH 0/2] Bug fix in aio ring page migration Date: Thu, 13 Mar 2014 17:45:42 +0800 Message-ID: <53217E46.3060100@cn.fujitsu.com> References: <1394439334-28523-1-git-send-email-tangchen@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Greg Kroah-Hartman , 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, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, linux-kernel@vger.kernel.org, miaox@cn.fujitsu.com, tangchen , guz.fnst@cn.fujitsu.com To: stable@vger.kernel.org Return-path: In-Reply-To: <1394439334-28523-1-git-send-email-tangchen@cn.fujitsu.com> Sender: owner-linux-aio@kvack.org List-Id: linux-fsdevel.vger.kernel.org This patchset has been applied to linux-next, and these problems also exist in 3.12.y and 3.13.y stable tree. So please merge this patchset to 3.12.y and 3.13.y stable tree. commit 692c9b8c5ee8d263bb8348171f0bebd3d84eb2c1 Author: Tang Chen Date: Mon Mar 10 16:15:33 2014 +0800 aio, memory-hotplug: Fix confliction when migrating and accessing ring pages. commit e0f5e0add36d2e3c456cf2f4283673ed834b3c24 Author: Tang Chen Date: Mon Mar 10 16:15:34 2014 +0800 aio, mem-hotplug: Add memory barrier to aio ring page migration. https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/fs/aio.c?id=692c9b8c5ee8d263bb8348171f0bebd3d84eb2c1 https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/fs/aio.c?id=e0f5e0add36d2e3c456cf2f4283673ed834b3c24 https://lkml.org/lkml/2014/3/10/56 https://lkml.org/lkml/2014/3/10/58 On 03/10/2014 04:15 PM, Tang Chen wrote: > 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(-) > -- To unsubscribe, send a message with 'unsubscribe linux-aio' in the body to majordomo@kvack.org. For more info on Linux AIO, see: http://www.kvack.org/aio/ Don't email: aart@kvack.org