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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 F2B06C3A5A6 for ; Thu, 29 Aug 2019 21:51:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7744233FF for ; Thu, 29 Aug 2019 21:51:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="uZ7gYvuF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727729AbfH2Vvw (ORCPT ); Thu, 29 Aug 2019 17:51:52 -0400 Received: from mail-wr1-f67.google.com ([209.85.221.67]:39277 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727440AbfH2Vvv (ORCPT ); Thu, 29 Aug 2019 17:51:51 -0400 Received: by mail-wr1-f67.google.com with SMTP id t16so4917117wra.6 for ; Thu, 29 Aug 2019 14:51:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=a+pc2ZK6ip9f10w36wuE0uTgxJ0ORyBREEL0adN4st0=; b=uZ7gYvuFxxXLJ0AI48bV1peOnU+47MgXGKBW8lzRy7hZ/tQTHGL7ShE2PgVaXPh3CG e9PRMNVMvZpy8TaYfaPh4y5jpQ4F5/X36gDmxAy10x1XtA6190iBK7diX9v8/8b2kuLt H0vfhgFxyyGro+sJ18h6TcpKtMdMnyNShmtRCZBV+IubRD68LgYTlAhbfLV8x2fEz1dE +8z7kbezZAdvjRFMi55zgZKuHmK/BXJb/VdQsx5l5DnA1/8dhtsM7fvzXTqE4NlIwZCs 8veXQeTuqvQFIUjGZVqYs8L7Elcz3Sa/zsfjv2wE6e4P0oSGXDtgdic5642cbNkBc3t6 NiSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=a+pc2ZK6ip9f10w36wuE0uTgxJ0ORyBREEL0adN4st0=; b=PvlpXOsDCtxWMIG9ywyuIuyAutimGYLloKSHtSrhWD0bxwtgcVseHcHSg8lkDpnpho Wj3nDfCbRvmHc7UcIN4dxGoY9HTFxEs4fbnN1HA/z0iYhVoW2WhBk/eigM1N3u7ALtbz sWJJTmk+hrP7rRze+lRViIy+1dRhRweb/9+AxJFuTgDzWDj+RZemipjSK6VLNt7IPwb/ TXIY7WS0T+J4Gz4EMJ8aD5FDZL3XgsY7WDj4Vy5vE2dNpZSHg0hZseMHSgg7aXPNQmxF KV9rfLQzxlmoHZFF30OS5b7iJY3VpwhjidDvON3vaLrwM5WdPau6CUBZAWM4zdgTRuMy VZ4Q== X-Gm-Message-State: APjAAAVEtAxSquKDcXaQIxzivjjL9emQx1cS3V2X7+phY6cU9lTK3ejX rm3rE+XE9iy5NtZmEucmTSaEIg== X-Google-Smtp-Source: APXvYqwcJvLgWiR9xO8uYbzgaktiUNcuPwuuDFj7cLjIOj8rSTAY6krtwYIcFl8q4NmW3Z9/5uw8EQ== X-Received: by 2002:a5d:6a45:: with SMTP id t5mr12230298wrw.228.1567115508416; Thu, 29 Aug 2019 14:51:48 -0700 (PDT) Received: from ?IPv6:2a01:e34:ed2f:f020:d9ce:7caa:c9ba:7f4c? ([2a01:e34:ed2f:f020:d9ce:7caa:c9ba:7f4c]) by smtp.googlemail.com with ESMTPSA id o14sm10135990wrg.64.2019.08.29.14.51.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 29 Aug 2019 14:51:47 -0700 (PDT) Subject: Re: Default governor regardless of cpuidle driver To: Joao Martins Cc: Marcelo Tosatti , "Rafael J. Wysocki" , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , =?UTF-8?B?UmFkaW0gS3LEjW3DocWZ?= , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linux-pm@vger.kernel.org, Boris Ostrovsky References: <20190829151027.9930-1-joao.m.martins@oracle.com> <6c8816af-934a-5bf7-6fb9-f67c05e2c8aa@oracle.com> <901ab688-5548-cf96-1dcb-ce50e617e917@linaro.org> <722bd6f6-6eee-b24b-9704-c9aecc06302f@oracle.com> <2e2a35c8-7f03-d7c8-4701-3bc9d91c1255@linaro.org> From: Daniel Lezcano Openpgp: preference=signencrypt Autocrypt: addr=daniel.lezcano@linaro.org; prefer-encrypt=mutual; keydata= mQINBFv/yykBEADDdW8RZu7iZILSf3zxq5y8YdaeyZjI/MaqgnvG/c3WjFaunoTMspeusiFE sXvtg3ehTOoyD0oFjKkHaia1Zpa1m/gnNdT/WvTveLfGA1gH+yGes2Sr53Ht8hWYZFYMZc8V 2pbSKh8wepq4g8r5YI1XUy9YbcTdj5mVrTklyGWA49NOeJz2QbfytMT3DJmk40LqwK6CCSU0 9Ed8n0a+vevmQoRZJEd3Y1qXn2XHys0F6OHCC+VLENqNNZXdZE9E+b3FFW0lk49oLTzLRNIq 0wHeR1H54RffhLQAor2+4kSSu8mW5qB0n5Eb/zXJZZ/bRiXmT8kNg85UdYhvf03ZAsp3qxcr xMfMsC7m3+ADOtW90rNNLZnRvjhsYNrGIKH8Ub0UKXFXibHbafSuq7RqyRQzt01Ud8CAtq+w P9EftUysLtovGpLSpGDO5zQ++4ZGVygdYFr318aGDqCljKAKZ9hYgRimPBToDedho1S1uE6F 6YiBFnI3ry9+/KUnEP6L8Sfezwy7fp2JUNkUr41QF76nz43tl7oersrLxHzj2dYfWUAZWXva wW4IKF5sOPFMMgxoOJovSWqwh1b7hqI+nDlD3mmVMd20VyE9W7AgTIsvDxWUnMPvww5iExlY eIC0Wj9K4UqSYBOHcUPrVOKTcsBVPQA6SAMJlt82/v5l4J0pSQARAQABtCpEYW5pZWwgTGV6 Y2FubyA8ZGFuaWVsLmxlemNhbm9AbGluYXJvLm9yZz6JAlcEEwEIAEECGwEFCwkIBwIGFQoJ CAsCBBYCAwECHgECF4ACGQEWIQQk1ibyU76eh+bOW/SP9LjScWdVJwUCXAkeagUJDRnjhwAK CRCP9LjScWdVJ+vYEACStDg7is2JdE7xz1PFu7jnrlOzoITfw05BurgJMqlvoiFYt9tEeUMl zdU2+r0cevsmepqSUVuUvXztN8HA/Ep2vccmWnCXzlE56X1AK7PRRdaQd1SK/eVsJVaKbQTr ii0wjbs6AU1uo0LdLINLjwwItnQ83/ttbf1LheyN8yknlch7jn6H6J2A/ORZECTfJbG4ecVr 7AEm4A/G5nyPO4BG7dMKtjQ+crl/pSSuxV+JTDuoEWUO+YOClg6azjv8Onm0cQ46x9JRtahw YmXdIXD6NsJHmMG9bKmVI0I7o5Q4XL52X6QxkeMi8+VhvqXXIkIZeizZe5XLTYUvFHLdexzX Xze0LwLpmMObFLifjziJQsLP2lWwOfg6ZiH8z8eQJFB8bYTSMqmfTulB61YO0mhd676q17Y7 Z7u3md3CLH7rh61wU1g7FcLm9p5tXXWWaAud9Aa2kne2O3sirO0+JhsKbItz3d9yXuWgv6w3 heOIF0b91JyrY6tjz42hvyjxtHywRr4cdAEQa2S7HeQkw48BQOG6PqQ9d3FYU34pt3WFJ19V A5qqAiEjqc4N0uPkC79W32yLGdyg0EEe8v0Uhs3CxM9euGg37kr5fujMm+akMtR1ENITo+UI fgsxdwjBD5lNb/UGodU4QvPipB/xx4zz7pS5+2jGimfLeoe7mgGJxrkBDQRb/8z6AQgAvSkg 5w7dVCSbpP6nXc+i8OBz59aq8kuL3YpxT9RXE/y45IFUVuSc2kuUj683rEEgyD7XCf4QKzOw +XgnJcKFQiACpYAowhF/XNkMPQFspPNM1ChnIL5KWJdTp0DhW+WBeCnyCQ2pzeCzQlS/qfs3 dMLzzm9qCDrrDh/aEegMMZFO+reIgPZnInAcbHj3xUhz8p2dkExRMTnLry8XXkiMu9WpchHy XXWYxXbMnHkSRuT00lUfZAkYpMP7La2UudC/Uw9WqGuAQzTqhvE1kSQe0e11Uc+PqceLRHA2 bq/wz0cGriUrcCrnkzRmzYLoGXQHqRuZazMZn2/pSIMZdDxLbwARAQABiQI2BBgBCAAgFiEE JNYm8lO+nofmzlv0j/S40nFnVScFAlv/zPoCGwwACgkQj/S40nFnVSf4OhAAhWJPjgUu6VfS mV53AUGIyqpOynPvSaMoGJzhNsDeNUDfV5dEZN8K4qjuz2CTNvGIyt4DE/IJbtasvi5dW4wW Fl85bF6xeLM0qpCaZtXAsU5gzp3uT7ut++nTPYW+CpfYIlIpyOIzVAmw7rZbfgsId2Lj7g1w QCjvGHw19mq85/wiEiZZNHeJQ3GuAr/uMoiaRBnf6wVcdpUTFMXlkE8/tYHPWbW0YKcKFwJ3 uIsNxZUe6coNzYnL0d9GK2fkDoqKfKbFjNhW9TygfeL2Qhk949jMGQudFS3zlwvN9wwVaC0i KC/D303DiTnB0WFPT8CltMAZSbQ1WEWfwqxhY26di3k9pj+X3BfOmDL9GBlnRTSgwjqjqzpG VZsWouuTfXd9ZPPzvYdUBrlTKgojk1C8v4fhSqb+ard+bZcwNp8Tzl/EI9ygw6lYEATGCUYI Wco+fjehCgG1FWvWavMU+jLNs8/8uwj1u+BtRpWFj4ug/VaDDIuiApKPwl1Ge+zoC7TLMtyb c00W5/8EckjmNgLDIINEsOsidMH61ZOlwDKCxo2lbV+Ij078KHBIY76zuHlwonEQaHLCAdqm WiI95pYZNruAJEqZCpvXDdClmBVMZRDRePzSljCvoHxn7ArEt3F14mabn2RRq/hqB8IhC6ny xAEPQIZaxxginIFYEziOjR65AQ0EW//NCAEIALcJqSmQdkt04vIBD12dryF6WcVWYvVwhspt RlZbZ/NZ6nzarzEYPFcXaYOZCOCv+Xtm6hB8fh5XHd7Y8CWuZNDVp3ozuqwTkzQuux/aVdNb Fe4VNeKGN2FK1aNlguAXJNCDNRCpWgRHuU3rWwGUMgentJogARvxfex2/RV/5mzYG/N1DJKt F7g1zEcQD3JtK6WOwZXd+NDyke3tdG7vsNRFjMDkV4046bOOh1BKbWYu8nL3UtWBxhWKx3Pu 1VOBUVwL2MJKW6umk+WqUNgYc2bjelgcTSdz4A6ZhJxstUO4IUfjvYRjoqle+dQcx1u+mmCn 8EdKJlbAoR4NUFZy7WUAEQEAAYkDbAQYAQgAIBYhBCTWJvJTvp6H5s5b9I/0uNJxZ1UnBQJb /80IAhsCAUAJEI/0uNJxZ1UnwHQgBBkBCAAdFiEEGn3N4YVz0WNVyHskqDIjiipP6E8FAlv/ zQgACgkQqDIjiipP6E+FuggAl6lkO7BhTkrRbFhrcjCm0bEoYWnCkQtX9YFvElQeA7MhxznO BY/r1q2Uf6Ifr3YGEkLnME/tQQzUwznydM94CtRJ8KDSa1CxOseEsKq6B38xJtjgYSxNdgQb EIfCzUHIGfk94AFKPdV6pqqSU5VpPUagF+JxiAkoEPOdFiQCULFNRLMsOtG7yp8uSyJRp6Tz cQ+0+1QyX1krcHBUlNlvfdmL9DM+umPtbS9F6oRph15mvKVYiPObI1z8ymHoc68ReWjhUuHc IDQs4w9rJVAyLypQ0p+ySDcTc+AmPP6PGUayIHYX63Q0KhJFgpr1wH0pHKpC78DPtX1a7HGM 7MqzQ4NbD/4oLKKwByrIp12wLpSe3gDQPxLpfGgsJs6BBuAGVdkrdfIx2e6ENnwDoF0Veeji BGrVmjVgLUWV9nUP92zpyByzd8HkRSPNZNlisU4gnz1tKhQl+j6G/l2lDYsqKeRG55TXbu9M LqJYccPJ85B0PXcy63fL9U5DTysmxKQ5RgaxcxIZCM528ULFQs3dfEx5euWTWnnh7pN30RLg a+0AjSGd886Bh0kT1Dznrite0dzYlTHlacbITZG84yRk/gS7DkYQdjL8zgFr/pxH5CbYJDk0 tYUhisTESeesbvWSPO5uNqqy1dAFw+dqRcF5gXIh3NKX0gqiAA87NM7nL5ym/CNpJ7z7nRC8 qePOXubgouxumi5RQs1+crBmCDa/AyJHKdG2mqCt9fx5EPbDpw6Zzx7hgURh4ikHoS7/tLjK iqWjuat8/HWc01yEd8rtkGuUcMqbCi1XhcAmkaOnX8FYscMRoyyMrWClRZEQRokqZIj79+PR adkDXtr4MeL8BaB7Ij2oyRVjXUwhFQNKi5Z5Rve0a3zvGkkqw8Mz20BOksjSWjAF6g9byukl CUVjC03PdMSufNLK06x5hPc/c4tFR4J9cLrV+XxdCX7r0zGos9SzTPGNuIk1LK++S3EJhLFj 4eoWtNhMWc1uiTf9ENza0ntqH9XBWEQ6IA1gubCniGG+Xg== Message-ID: Date: Thu, 29 Aug 2019 23:51:46 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org On 29/08/2019 23:12, Joao Martins wrote: [ ... ] >>> Say you wanted to have a kvm specific config, you would still see the same >>> problem if you happen to compile intel_idle together with haltpoll >>> driver+governor. >> >> Can a guest work with an intel_idle driver? >> > Yes. > > If you use Qemu you would add '-overcommit cpu-pm=on' to try it out. ofc, > assuming you're on a relatively recent Qemu (v3.0+) and a fairly recent kernel > version as host (v4.17+). Ok, thanks for the clarification. >>> Creating two separate configs here, with and without haltpoll >>> for VMs doesn't sound effective for distros. >> >> Agree >> >>> Perhaps decreasing the rating of >>> haltpoll governor, but while a short term fix it wouldn't give much sensible >>> defaults without the one-off runtime switch. The rating has little meaning because each governor fits a specific situation (server, desktop, etc...) and it would probably make sense to remove it and add a default governor in the config file like the cpufreq. May be I missed the point from some previous discussion but IMHO the problem you are facing is coming from the design: there is no need to create a halt governor but move the code inside the cpuidle-halt driver instead and ignore the state asked by the governor and return the state the driver entered. -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog