From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68056C46460 for ; Wed, 22 May 2019 10:02:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3ECAF21841 for ; Wed, 22 May 2019 10:02:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728984AbfEVKCc (ORCPT ); Wed, 22 May 2019 06:02:32 -0400 Received: from outgoing-stata.csail.mit.edu ([128.30.2.210]:48310 "EHLO outgoing-stata.csail.mit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728602AbfEVKCc (ORCPT ); Wed, 22 May 2019 06:02:32 -0400 Received: from c-73-193-85-113.hsd1.wa.comcast.net ([73.193.85.113] helo=srivatsab-a01.vmware.com) by outgoing-stata.csail.mit.edu with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1hTO4p-000DVo-GO; Wed, 22 May 2019 06:02:27 -0400 Subject: Re: CFQ idling kills I/O performance on ext4 with blkio cgroup controller To: Paolo Valente Cc: linux-fsdevel@vger.kernel.org, linux-block , linux-ext4@vger.kernel.org, cgroups@vger.kernel.org, kernel list , Jens Axboe , Jan Kara , jmoyer@redhat.com, Theodore Ts'o , amakhalov@vmware.com, anishs@vmware.com, srivatsab@vmware.com References: <8d72fcf7-bbb4-2965-1a06-e9fc177a8938@csail.mit.edu> <1812E450-14EF-4D5A-8F31-668499E13652@linaro.org> <46c6a4be-f567-3621-2e16-0e341762b828@csail.mit.edu> <07D11833-8285-49C2-943D-E4C1D23E8859@linaro.org> <5B6570A2-541A-4CF8-98E0-979EA6E3717D@linaro.org> <2CB39B34-21EE-4A95-A073-8633CF2D187C@linaro.org> <0e3fdf31-70d9-26eb-7b42-2795d4b03722@csail.mit.edu> <9E95BE27-2167-430F-9C7F-6D4A0E255FF3@linaro.org> From: "Srivatsa S. Bhat" Message-ID: Date: Wed, 22 May 2019 03:02:25 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <9E95BE27-2167-430F-9C7F-6D4A0E255FF3@linaro.org> Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On 5/22/19 2:12 AM, Paolo Valente wrote: > >> Il giorno 22 mag 2019, alle ore 11:02, Srivatsa S. Bhat ha scritto: >> >> >> Let's continue here on LKML itself. > > Just done :) > >> The only reason I created the >> bugzilla entry is to attach the tarball of the traces, assuming >> that it would allow me to upload a 20 MB file (since email attachment >> didn't work). But bugzilla's file restriction is much smaller than >> that, so it didn't work out either, and I resorted to using dropbox. >> So we don't need the bugzilla entry anymore; I might as well close it >> to avoid confusion. >> > > No no, don't close it: it can reach people that don't use LKML. We > just have to remember to report back at the end of this. Ah, good point! > BTW, I also > think that the bug is incorrectly filed against 5.1, while all these > tests and results concern 5.2-rcX. > Fixed now, thank you for pointing out! Regards, Srivatsa VMware Photon OS