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=-4.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 E0088C433E0 for ; Fri, 7 Aug 2020 19:42:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCEDB2075A for ; Fri, 7 Aug 2020 19:42:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726224AbgHGTmF (ORCPT ); Fri, 7 Aug 2020 15:42:05 -0400 Received: from shelob.surriel.com ([96.67.55.147]:57250 "EHLO shelob.surriel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725893AbgHGTmF (ORCPT ); Fri, 7 Aug 2020 15:42:05 -0400 Received: from imladris.surriel.com ([96.67.55.152]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1k48Fa-0001C6-99; Fri, 07 Aug 2020 15:41:58 -0400 Message-ID: <9ed51691d4e129b5c30343a89a107d4ff9dd89ce.camel@surriel.com> Subject: Re: CFS flat runqueue proposal fixes/update From: Rik van Riel To: Dietmar Eggemann , Peter Zijlstra Cc: Paul Turner , "vincent.guittot" , kernel-team@fb.com, "linux-kernel@vger.kernel.org" , "dietmar.eggeman" Date: Fri, 07 Aug 2020 15:41:57 -0400 In-Reply-To: <1eaeeb1d-96c7-4819-8e1e-8f190a650030@arm.com> References: <1609106d05a6a4a5938233e993548510f599d7d9.camel@surriel.com> <1eaeeb1d-96c7-4819-8e1e-8f190a650030@arm.com> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-5o37GL1is6EbjFxi3XMZ" User-Agent: Evolution 3.34.4 (3.34.4-1.fc31) MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-5o37GL1is6EbjFxi3XMZ Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Fri, 2020-08-07 at 16:14 +0200, Dietmar Eggemann wrote: > On 31/07/2020 09:42, Rik van Riel wrote: > > Possible solution > > ... > I imagine that I can see what you want to achieve here ;-) >=20 > But it's hard since your v5 RFC > https://lkml.kernel.org/r/20190906191237.27006-1-riel@surriel.com is > pretty old by now. The v5 patches also do not implement this new idea, and still suffer from the corner cases that Paul Turner pointed out last year. > Do you have a version of the patch-set against tip/sched/core? Quite > a > lot has changed (runnable load avg replaced by runnable avg, rq->load=20 > is > gone, CFS load balance rework). Not yet. We got a baby this spring, so I've been busy with things like milk and diapers, instead of with code. I wanted to get this proposal out before Plumbers, so we could at least talk about it, and maybe find flaws with this idea before I spend weeks/months implementing it :) > IMHO it would be extremely helpful to have a current patch-set to > discuss how these other problems can be covered by patches on top. Agreed. I hope to get some time to work on that, but no guarantees about getting it ready before Plumbers :) --=20 All Rights Reversed. --=-5o37GL1is6EbjFxi3XMZ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEKR73pCCtJ5Xj3yADznnekoTE3oMFAl8troUACgkQznnekoTE 3oMeYAgAoMKreC/fhuo73dZvdb+q53y8WBAwJ7e5rrlrLA5Bib6Cg1rZbTjS4lXM qMI+24OjQxj+J/wOfhlKxH9/HRxmCk/8sCv8SHKEnnhbJudiCEfuf7UPLMUT/r2F myL1BOlM/cjE+D5lKzq+6CDDGlFOMauiHNteSkX70nBNgm6kwXQOLDdCZFE0n3ej CI0zijJ3KLDZC8uV/1LT625IfTwy1YuwjY9xDU5gIrkE2CkgPLEvA5qLQzuvq82f rUD4JUxR2CKV/4czEbJZmXb5uMfEKE7172XRTAKkpHjT1CIozoyc9P+DphQatThr wkcue/ZRoPzxmQY37jRA4LPx7A9JFQ== =mLBW -----END PGP SIGNATURE----- --=-5o37GL1is6EbjFxi3XMZ--