From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933470AbcBCQio (ORCPT ); Wed, 3 Feb 2016 11:38:44 -0500 Received: from mga11.intel.com ([192.55.52.93]:28504 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757982AbcBCQiK (ORCPT ); Wed, 3 Feb 2016 11:38:10 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,391,1449561600"; d="scan'208";a="895628912" Date: Wed, 3 Feb 2016 16:38:09 +0000 From: Keith Busch To: Wenbo Wang Cc: Jens Axboe , Wenbo Wang , "linux-kernel@vger.kernel.org" , "linux-nvme@lists.infradead.org" , "Wenwei.Tao" Subject: Re: [PATCH] NVMe: do not touch sq door bell if nvmeq has been suspended Message-ID: <20160203163808.GC23910@localhost.localdomain> References: <1454341324-21273-1-git-send-email-mail_weber_wang@163.com> <56AF8DB5.70206@fb.com> <20160203144123.GB23910@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 03, 2016 at 04:35:03PM +0000, Wenbo Wang wrote: > For async io (executed by run_work worker) it should work. However for sync io in blk_mq_run_hw_queue, this seems not help, there is still a window. Alright, for lack of a better way to sync a stopped queue, the driver's indication looks like the best we can do at this point.