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=-8.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 402EFC47094 for ; Thu, 10 Jun 2021 13:01:49 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0E33961362 for ; Thu, 10 Jun 2021 13:01:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0E33961362 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:References :In-Reply-To:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=iGK9EdBqP/zo+shxkvh119dbUpkhH0QUNNl0vjfhiwo=; b=cmRBRDqfJ7AkpK ho7ZQW5LFHfk9vySiZ7SlUtRWeIOQLX/8t8+mYFs/Cx4Yu7PaO8VB8rMWFPSzRdFTcHuj4DPH69RR R9+qPnkREkFowxvvH5wYJlHWJjiGQOiCIY016gL7q0VS/WQkximLBBMjX5WG+uotsTGO+6zMcIYB9 kPIjzP/tvOVqRpEsUe17tasjyZ4we37TVUO+Ef588tUR5yPAUPBnRG2qpjTKo1ByX6/9berHYJ2fW 3HbtEPbyl4yjPdaEKHNgy6GfnZEGwH2TYqpUzLX9IB9BvZo/NEcQZEThhVQVW48CxUavrjOytoxkh 9qsAu5UigmABV86KIDkw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lrKHt-000nLK-B7; Thu, 10 Jun 2021 12:59:57 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lrKHp-000nKR-55 for linux-arm-kernel@lists.infradead.org; Thu, 10 Jun 2021 12:59:54 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8EBAF106F; Thu, 10 Jun 2021 05:59:49 -0700 (PDT) Received: from e113632-lin (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C90F13F73D; Thu, 10 Jun 2021 05:59:46 -0700 (PDT) From: Valentin Schneider To: Will Deacon , linux-arm-kernel@lists.infradead.org Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Will Deacon , Catalin Marinas , Marc Zyngier , Greg Kroah-Hartman , Peter Zijlstra , Morten Rasmussen , Qais Yousef , Suren Baghdasaryan , Quentin Perret , Tejun Heo , Johannes Weiner , Ingo Molnar , Juri Lelli , Vincent Guittot , "Rafael J. Wysocki" , Dietmar Eggemann , Daniel Bristot de Oliveira , Mark Rutland , kernel-team@android.com Subject: Re: [PATCH v9 06/20] cpuset: Don't use the cpu_possible_mask as a last resort for cgroup v1 In-Reply-To: <20210608180313.11502-7-will@kernel.org> References: <20210608180313.11502-1-will@kernel.org> <20210608180313.11502-7-will@kernel.org> Date: Thu, 10 Jun 2021 13:59:41 +0100 Message-ID: <878s3hdgea.mognet@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210610_055953_260246_33745401 X-CRM114-Status: UNSURE ( 9.43 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 08/06/21 19:02, Will Deacon wrote: > If the scheduler cannot find an allowed CPU for a task, > cpuset_cpus_allowed_fallback() will widen the affinity to cpu_possible_mask > if cgroup v1 is in use. > > In preparation for allowing architectures to provide their own fallback > mask, just return early if we're either using cgroup v1 or we're using > cgroup v2 with a mask that contains invalid CPUs. This will allow > select_fallback_rq() to figure out the mask by itself. > > Cc: Tejun Heo > Cc: Johannes Weiner > Reviewed-by: Quentin Perret > Signed-off-by: Will Deacon Reviewed-by: Valentin Schneider _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel