Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933782AbcKDAJ4 (ORCPT ); Thu, 3 Nov 2016 20:09:56 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:59281 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933372AbcKDAJz (ORCPT ); Thu, 3 Nov 2016 20:09:55 -0400 Date: Thu, 3 Nov 2016 17:09:54 -0700 From: Christoph Hellwig To: Shaohua Li Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, Kernel-team@fb.com, axboe@fb.com Subject: Re: [PATCH V2 2/2] blk-mq: immediately dispatch big size request Message-ID: <20161104000954.GA10266@infradead.org> References: <05e8cb8c7e09903c7db36e81a6bbd0b39b24deff.1478217670.git.shli@fb.com> <6297c9a39cf21c94c65d5a9b3a19e54ba5b8b573.1478217671.git.shli@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6297c9a39cf21c94c65d5a9b3a19e54ba5b8b573.1478217671.git.shli@fb.com> User-Agent: Mutt/1.6.1 (2016-04-27) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 252 Lines: 5 On Thu, Nov 03, 2016 at 05:03:54PM -0700, Shaohua Li wrote: > This is corresponding part for blk-mq. Disk with multiple hardware > queues doesn't need this as we only hold 1 request at most. Any reason you only do this for the SQ and not the MQ case?