From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Lei Subject: Re: [PATCH 0/9] block/scsi: safe SCSI quiescing Date: Fri, 1 Sep 2017 01:38:34 +0800 Message-ID: <20170831173833.GC5928@ming.t460p> References: <20170831172728.15817-1-ming.lei@redhat.com> <1576539.niWZoWEnd8@natalenko.name> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx1.redhat.com ([209.132.183.28]:43176 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751507AbdHaRis (ORCPT ); Thu, 31 Aug 2017 13:38:48 -0400 Content-Disposition: inline In-Reply-To: <1576539.niWZoWEnd8@natalenko.name> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: Oleksandr Natalenko Cc: Jens Axboe , linux-block@vger.kernel.org, Christoph Hellwig , Bart Van Assche , linux-scsi@vger.kernel.org, "Martin K . Petersen" , "James E . J . Bottomley" On Thu, Aug 31, 2017 at 07:34:06PM +0200, Oleksandr Natalenko wrote: > Since I'm in CC, does this series aim to replace 2 patches I've tested before: > > blk-mq: add requests in the tail of hctx->dispatch > blk-mq: align to legacy's implementation of blk_execute_rq > > ? Yeah, this solution is more generic, and the old one in above two patches may run into the same deadlock inevitably. Oleksandr, could you test this patchset and provide the feedback? BTW, it fixes the I/O hang in my raid10 test, but I just write 'devices' to pm_test. Thanks! -- Ming