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Date: Wed, 28 May 2014 09:34:41 +0800 From: Ming Lei <tom.leiming@...il.com> To: Jens Axboe <axboe@...nel.dk> Cc: Christoph Hellwig <hch@....de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, stable <stable@...r.kernel.org> Subject: Re: [PATCH] block: mq flush: fix race between IPI handler and mq flush worker On Wed, May 28, 2014 at 3:35 AM, Jens Axboe <axboe@...nel.dk> 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 <tom.leiming@...il.com> Thanks, -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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