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=-4.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 C25F1C433ED for ; Fri, 21 May 2021 11:07:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A3AB5613C8 for ; Fri, 21 May 2021 11:07:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234000AbhEULJT (ORCPT ); Fri, 21 May 2021 07:09:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233908AbhEULJR (ORCPT ); Fri, 21 May 2021 07:09:17 -0400 Received: from mail-wr1-x42c.google.com (mail-wr1-x42c.google.com [IPv6:2a00:1450:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E023C061574 for ; Fri, 21 May 2021 04:07:53 -0700 (PDT) Received: by mail-wr1-x42c.google.com with SMTP id i17so20637991wrq.11 for ; Fri, 21 May 2021 04:07:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=lW2VSI3nJ4Vddi+1kKuQZ4/qJ4a3Vtk+nDPAraB5sxw=; b=bI7Adm555dFoAu3vvdcplE93r70Ps4TyxC+IL4jp+JtEMqvaqcJt/pLs1fKHNNxYnV Rp6SNh7ecqAre+8Xe4BAqK2sjh+/B9d6MgmpFBPmDtOHpeM7zLvNlbGVmIWnKQVyOZrL fmPVyM9m1QsvMzibHJm/dl2NVFV3iupgtN8GmSoDAFP+Ujd9Awsr4bUaOU8He3qwap5W qpBRTEjLWTq72jAPjQUgr97ONW2MjOmhgrCkzbW5IplNYwGBuePBEE2dmhDXsxCyCyrT 0J52XtzfpzsPBkSG5MuxJHPVL5YtVjZN3bgg7TodtGgt+F8DEu955Xf8WewZKHc9Fs6i V1HA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:cc:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=lW2VSI3nJ4Vddi+1kKuQZ4/qJ4a3Vtk+nDPAraB5sxw=; b=pJssl0SzSG+BpqDR+ViBAZOWSVfnh/Itnv2+nwRNgN+iAuc41KOikL5p82osrM2vXX NdcXayvzvEVhwkKibuAsiJY7M9gzXtdugeqaWqe5YDEDIrlTA/PuUGdrTuqHp8ZWMncV bxYPGQmUvMhM0dgjghU5pOLH2f64xlRdjmdkhJXcq4gXIFEO3MSlS6r+cXgLlEWvZhmQ WG/29dhBqalu5nw1Myd5kAm8Dkaa0hrRTIaq6i9PF4yCZFqVOZ1UrRohb1A3twCNMYLV mmojBBYN0w8YK9klr+iEj4OE3shzMzT3kwAi7258Kq6wr3/LZYVEn6cYtt1winI4+Lrk ONpw== X-Gm-Message-State: AOAM532rR2H7sbmVDezCLOENcoULt7tZjMLhSx0M1pZRfpJzWPEojMur 67c2FL76NbHLbbUdtCiniz1p+08vfzo= X-Google-Smtp-Source: ABdhPJxTtMOqA/3LGZOrqqMOgkZS+Ow6XpS3jp5Nm/KavHNmGhdUBrsIyQ3PZx2Xm2i7HANnn6UeEg== X-Received: by 2002:adf:f341:: with SMTP id e1mr7524821wrp.352.1621595271866; Fri, 21 May 2021 04:07:51 -0700 (PDT) Received: from [192.168.43.70] ([46.222.120.224]) by smtp.gmail.com with ESMTPSA id g10sm1772723wrq.12.2021.05.21.04.07.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 21 May 2021 04:07:51 -0700 (PDT) Subject: Re: ioprio_get(2) outdated To: Tycho Kirchner References: Cc: "Michael Kerrisk (man-pages)" , linux-man From: "Alejandro Colomar (man-pages)" Message-ID: Date: Fri, 21 May 2021 13:07:50 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Hi Tycho, On 5/20/21 12:30 PM, Tycho Kirchner wrote: > Hi, > please update ioprio_get(2) to the today more common Multi-Queue Block > IO Queueing Mechanism (blk-mq). In particular: > >> These system calls have an effect only when used in conjunction >> with an I/O scheduler that supports I/O priorities.  As at kernel >> 2.6.17 the only such scheduler is the Completely Fair Queuing >> (CFQ) I/O scheduler. > > As far as I know BFQ is the only mq-iosched which supports (read-) > priorities. See also [1]. The kernel Documentation/block/ioprio.txt is > outdated as well, I guess I'll send an email there too. > > Thanks and kind regards > Tycho Kirchner Okay, I don't know much about it, so I'll CC Michael. Thanks, Alex > > > > [1]: https://www.kernel.org/doc/html/latest/block/bfq-iosched.html -- Alejandro Colomar Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/ Senior SW Engineer; http://www.alejandro-colomar.es/