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=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT 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 B4D65C48BD4 for ; Tue, 25 Jun 2019 05:13:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 852EF20656 for ; Tue, 25 Jun 2019 05:13:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="HM0YzezU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727839AbfFYFNG (ORCPT ); Tue, 25 Jun 2019 01:13:06 -0400 Received: from mail-wr1-f67.google.com ([209.85.221.67]:44297 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727358AbfFYFNG (ORCPT ); Tue, 25 Jun 2019 01:13:06 -0400 Received: by mail-wr1-f67.google.com with SMTP id r16so16192063wrl.11 for ; Mon, 24 Jun 2019 22:13:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=6gLoDta3dvks3JMjP4ttL9HRhFOLozt40bGbv9xuKK0=; b=HM0YzezUeNwli6ksWOIkCS+8IZfqUikKPl7NJo/yxSA6QsEXEdB5LEBRsqnmnbeIx0 zDldjruUq0Yppg7OgL+00H0lzxbdubSLldJflP8ydhzO8klqDQRmH7hoDt6IGrzrEU40 114y3hr4fPYkuMSuDsMhS0rXTTiiYQyyHOFI47OTDMKwWNkDqjl7CvkdsYL/qNqYxKad LAqXwG+W2r6VbaG7RIhvxFKaHxO9agS2yiOgH0PNWO7wX/ZPWhpMrAj/MW/UdHFy6LKD lwMBPoye6qwgCmNjYwF951JaxoROBH1R9ASIckX3hKtOb+T9BKBtXCE/OUSs8uLn5sKX tW1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=6gLoDta3dvks3JMjP4ttL9HRhFOLozt40bGbv9xuKK0=; b=fCFvPEheMwutpohQK0/+c9EXOG8lmcgqGbGpdvDa8SPj8wpYe6J0/vq+3FHGavbdNU P0/dA22eN4WBggaUGa2PHkTwFq/n0TBQYDr3McaCK/s5p4Ua3g9274VCSlNKFe4NesmR RQ7+E7cmynbSH1qmo6gLym77umgZ/V6Y5I+j39k2p3OqWdEwcrR0W1rOUPOaAHNgBjpv AhwxB3rww86MJLOSLAQ1uMEUgWEMVP9O6qO9RHVh5OgRHyGcHLxiMaa6JOd+w+wVf6Rq QX9GkJg3dv4Ge1Jo1QS77rPV80o+E/zZZY7N15oh3WeuVMvxddLnOsrfDnKEXo7K/nyY 063g== X-Gm-Message-State: APjAAAUH84PcXs3XWzkbKTuPJGB/jAd2L+a/GTVqMUY3lTUIW0DL3azm 94NxZldHX3kv9IV9i8UULrkw2Q== X-Google-Smtp-Source: APXvYqxFf5fs/86ySg7E8ipCDZs3uw8tj2dGbt9V4tAZfpD3w53wMOKgDNLx1i71rOdajwtq122gBA== X-Received: by 2002:adf:fc52:: with SMTP id e18mr49271096wrs.14.1561439584126; Mon, 24 Jun 2019 22:13:04 -0700 (PDT) Received: from localhost.localdomain (146-241-102-168.dyn.eolo.it. [146.241.102.168]) by smtp.gmail.com with ESMTPSA id q20sm28543149wra.36.2019.06.24.22.13.03 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 24 Jun 2019 22:13:03 -0700 (PDT) From: Paolo Valente To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, linus.walleij@linaro.org, bfq-iosched@googlegroups.com, oleksandr@natalenko.name, bottura.nicola95@gmail.com, srivatsa@csail.mit.edu, Paolo Valente Subject: [PATCH BUGFIX IMPROVEMENT V2 0/7] boost throughput with synced I/O, reduce latency and fix a bandwidth bug Date: Tue, 25 Jun 2019 07:12:42 +0200 Message-Id: <20190625051249.39265-1-paolo.valente@linaro.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [SAME AS V1, APART FROM SRIVATSA ADDED AS REPORTER] Hi Jens, this series, based against for-5.3/block, contains: 1) The improvements to recover the throughput loss reported by Srivatsa [1] (first five patches) 2) A preemption improvement to reduce I/O latency 3) A fix of a subtle bug causing loss of control over I/O bandwidths Thanks, Paolo [1] https://lkml.org/lkml/2019/5/17/755 Paolo Valente (7): block, bfq: reset inject limit when think-time state changes block, bfq: fix rq_in_driver check in bfq_update_inject_limit block, bfq: update base request service times when possible block, bfq: bring forward seek&think time update block, bfq: detect wakers and unconditionally inject their I/O block, bfq: preempt lower-weight or lower-priority queues block, bfq: re-schedule empty queues if they deserve I/O plugging block/bfq-iosched.c | 952 ++++++++++++++++++++++++++++++-------------- block/bfq-iosched.h | 25 +- 2 files changed, 686 insertions(+), 291 deletions(-) -- 2.20.1