From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752135AbdHHLt5 (ORCPT ); Tue, 8 Aug 2017 07:49:57 -0400 Received: from mail-ua0-f170.google.com ([209.85.217.170]:37300 "EHLO mail-ua0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751925AbdHHLtz (ORCPT ); Tue, 8 Aug 2017 07:49:55 -0400 MIME-Version: 1.0 In-Reply-To: <20170808112711.om7z6djl6igsuvnm@techsingularity.net> References: <20170803085115.r2jfz2lofy5spfdb@techsingularity.net> <1B2E3D98-1152-413F-84A9-B3DAC5A528E8@linaro.org> <20170803110144.vvadm3cc5oetf7up@techsingularity.net> <4B181ED1-8605-4156-9BBF-B61A165BE7F5@linaro.org> <20170804110103.oljdzsy7bds6qylo@techsingularity.net> <34B4C2EB-18B2-4EAB-9BBC-8095603D733D@linaro.org> <70979B37-6F91-49C3-9C77-CB3364035DDF@linaro.org> <20170808103023.2b2tks5y5lniuq2k@techsingularity.net> <20170808112711.om7z6djl6igsuvnm@techsingularity.net> From: Ming Lei Date: Tue, 8 Aug 2017 19:49:53 +0800 Message-ID: Subject: Re: Switching to MQ by default may generate some bug reports To: Mel Gorman Cc: Paolo Valente , Christoph Hellwig , Jens Axboe , Linux Kernel Mailing List , linux-block Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 8, 2017 at 7:27 PM, Mel Gorman wrote: > On Tue, Aug 08, 2017 at 06:43:03PM +0800, Ming Lei wrote: >> Hi Mel Gorman, >> >> On Tue, Aug 8, 2017 at 6:30 PM, Mel Gorman wrote: >> .... >> > >> > o I've queued a subset of tests with Ming's v3 patchset as that was the >> > latest branch at the time I looked. It'll take quite some time to execute >> > as the grid I use to collect data is backlogged with other work >> >> The latest patchset is in the following post: >> >> http://marc.info/?l=linux-block&m=150191624318513&w=2 >> >> And you can find it in my github: >> >> https://github.com/ming1/linux/commits/blk-mq-dispatch_for_scsi.V4 >> > > Unfortunately, the tests were queued last Friday and are partially complete > depending on when machines become available. As it is, v3 will take a few > days to complete and a requeue would incur further delays. If you believe > the results will be substantially different then I'll discard v3 and requeue. Firstly V3 on github(never posted out) causes boot hang if CPU cores is >= 16, so you need to check if the test is still running, :-( Also V3 on github may not perform well on IB SRP(or other low latency SCSI disk), so I improve bio merge in V4 and make IB SRP's perf better too, and it depends on devices. I suggest to focus on V2 posted in mail list(V4 in github). -- Ming Lei