From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <5385494E.1070803@kernel.dk> Date: Tue, 27 May 2014 20:26:22 -0600 From: Jens Axboe MIME-Version: 1.0 To: Ming Lei CC: Christoph Hellwig , Linux Kernel Mailing List , stable Subject: Re: [PATCH] block: mq flush: fix race between IPI handler and mq flush worker References: <20140520152303.GA20352@lst.de> <20140521053634.GA4764@lst.de> <20140527181305.GA7975@lst.de> <5384DB97.70606@kernel.dk> <20140527185301.GA8466@lst.de> <5384DF5E.3020304@kernel.dk> <20140527191510.GA9274@lst.de> <5384E4D4.6040101@kernel.dk> <20140527192130.GA9850@lst.de> <5384E8FA.8080201@kernel.dk> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: On 2014-05-27 19:34, Ming Lei wrote: > On Wed, May 28, 2014 at 3:35 AM, Jens Axboe wrote: >> On 05/27/2014 01:21 PM, Christoph Hellwig wrote: >>> On Tue, May 27, 2014 at 01:17:40PM -0600, Jens Axboe wrote: >>>> But I think you sent the old one again, not the new variant :-) >>> >>> Oh well, next try: >> >> This looks good to me. Was trying to think of ways to reduce that to one >> list iteration, but I think it's cleaner to just retain the two separate >> ones. >> >> Reusing REQ_SOFTBARRIER is fine as well, not used in blk-mq otherwise. >> >> Let me know when you have runtime verified it. > > Looks writing over ext4(especially sync writing) can survive > with Christoph's patch now, thanks Christoph. > > Reported-and-tested-by: Ming Lei Great! I'll queue it up here too, then. -- Jens Axboe