From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753500AbcLFPa3 (ORCPT ); Tue, 6 Dec 2016 10:30:29 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:47632 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751277AbcLFPa1 (ORCPT ); Tue, 6 Dec 2016 10:30:27 -0500 Subject: Re: [PATCHSET/RFC v2] Make legacy IO schedulers work with blk-mq To: Paolo Valente References: <1480962426-15767-1-git-send-email-axboe@fb.com> CC: Jens Axboe , , Linux-Kernal , Mark Brown , Ulf Hansson , Linus Walleij From: Jens Axboe Message-ID: <84313e6b-c0c8-8713-2ad6-b4c3ff52e011@fb.com> Date: Tue, 6 Dec 2016 08:29:53 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit X-Originating-IP: [216.160.245.98] X-ClientProxiedBy: DM3PR12CA0041.namprd12.prod.outlook.com (10.164.12.179) To BN6PR15MB1185.namprd15.prod.outlook.com (10.172.205.139) X-Microsoft-Exchange-Diagnostics: 1;BN6PR15MB1185;2:+WbUT69xRZM5JE9ylCvy+8UllOVlkvwPHCr2sCKkqp8Enm9sdEBkLrSb9jME8AWiO0OwR5iyNARtkag5jdPtGO5XgezbSQzDBumaB4MvOfFwlZLE3deLLFq6C28VTWlYXJ2eiFZ5ehTyCWP7lvsYk24pETYEIrTlRde5xWm5yHo=;3:SQnaI3ala7BFKXw0wXgkOnwzne5RyYAcVsIw20ap2GhmvhjLYtIOnYUriTl3ndFZiFz4r1LNBdsvn/bqpDhDzAzFzrK6AJOAMxHKQCXE42KoSFUHB8IrGJdnIOkr9J/SFnRHldWnqCULc7UCzKZdL4RAEM3PHRT+as/5Hcm8GHY=;25:PbLYTygU//V6cDzXFaKpRUusHq4IGCLW1WadzJazVJ+OYFXyCoMMZLuZ4SMZcOJADqwHFno114idLybv9UEURdCL4CcaywBjRNnuJmIEPuiJW+d0DhiSgNVpLKFvlKEiFHBFtIyvkfuVQLbY+rX85mXYNWrAVngOfTpFsbeAUIyRdXPEJtIVlVSVTHhBdUmx+GiL0jJJuGekM/CxRO+WGHGYM8+HZh564KXATanhQHu1gX5EyJlS1zTL2uEiCbrjbKmTwLRnJVWF5QYEN85FjIE7q2OVezlrf9Z42m+rZJ3MfQbJ6Bm8DliY9Ws1hREsabgPjF2EAwFKSFm5S8GB3QDpfcXN9xE0Htcf6Ah+6MMjV3nJjNNcC0NuSRPG0/prq35exw/COjopLiY6AedSfooNDIjwJbPaG2RA70tWfh2bkgFgaI48vhnhS4+3RQn+9hgRR3vJXe5KqWd6ob6hvg== X-MS-Office365-Filtering-Correlation-Id: 994cd994-6d04-4a6e-6350-08d41decbcba X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001);SRVR:BN6PR15MB1185; 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Original posting is here: >> >> https://marc.info/?l=linux-block&m=148073493203664&w=2 >> >> You can also found this version in the following git branch: >> >> git://git.kernel.dk/linux-block blk-mq-legacy-sched.2 >> >> and new developments/fixes will happen in the 'blk-mq-legacy-sched' >> branch. >> > > Hi Jens, > while running some tests, the system hung after a while. > > If I'm not mistaken, the above branches contain a (modified) 4.9-rc1. > Maybe instability follows from that? I have tried a rebase, but > resulting conflicts are non-trivial (for me) to solve. > > Meanwhile, if you deem it useful, I can provide you with the oops > message, as I catch it. Please do. I run my testing with master pulled in, but I can rebase the branch to include that. > As a secondary issue, iostat always reports 0 MB/s for both reads and > writes, while tps are non null. Looks like only the inflight stuff worked, but the completion bytes. Let me fix that up. Done. OK, pull from: git://git.kernel.dk/linux-block blk-mq-legacy-sched and you'll get the latest and greatest, and merged to 4.9-rc8 as well. -- Jens Axboe