Received: by 2002:a25:1985:0:0:0:0:0 with SMTP id 127csp738583ybz; Wed, 22 Apr 2020 07:09:22 -0700 (PDT) X-Google-Smtp-Source: APiQypLaPQBPckB+bIaP31eH/w9mye2OK74csO+zEZcxNT7DumrO8Hz6LIPJu8T4Ruj8wnCkyj21 X-Received: by 2002:aa7:d0c2:: with SMTP id u2mr9101994edo.78.1587564561867; Wed, 22 Apr 2020 07:09:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1587564561; cv=none; d=google.com; s=arc-20160816; b=wPWfPyJBKW1mdzw75zZ7MEGQXknACla77pUTNBqDnTKa8M/I9fLpabhsHdSyqsGwzU VqR3KmpNxJCWsuPI7bqa4irQ76BiGdyQIizsqq0DqUMlNIaCHozERXUd2r5fD5L4oVDF OOLXKQeNF96vqRLgoKvugLPY+PEM9AYphOUyaWuWpHx3q5FpbQVg4SoPqjTsmxv7lhdp 641swD11gCn4Iglyq6oyRr1VrGI3VXXvQIFaeKbvkiAsT16I3ZGjmZqlISph2LCjbJaJ lCe5A5AcueNXsBqjWtLvw4rFzrlnVdnPABwpFLq0hP8q4pLf/fODGAl3mTpqdpRjS3Tk /0AQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=uEEWRzeSQiKaXNHFBvCz47pFANQZxWpf7DB21cUl2uA=; b=lbLVbU3bo3v0ninxEP4ukx/MsUk8rL1Lvl/TRkPBEDa9lLnIulLU6vJuNfYP0jytIM BrADtLxzUx3VD2mgRJeKKVRWHH4qwHEskp1ECRm6C5H9eMv/tx395GoIx/+/QKGb1o8W p2GbaWKVoAC7f5LzYjDWq2DFuv06RRTCR90+F6zGFlZomHrdv/uXpvJNgDYWyinRse2k 6OesTEcuq9G/LoUQsjGrEeZ6MdqDKdvX+9Gj1ud1ww4HAkLV9TwKDQ+aPFU7vp+pJsIS z5LEFm9m86Cb4YsjYM4bDY9r1S9iiNNDPyMRA3z+HjVfDVjFRyrVbl4u0iw/xxPkSkow 2PQQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id do17si4330143ejc.266.2020.04.22.07.08.44; Wed, 22 Apr 2020 07:09:21 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726953AbgDVOG6 (ORCPT + 99 others); Wed, 22 Apr 2020 10:06:58 -0400 Received: from foss.arm.com ([217.140.110.172]:50436 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725810AbgDVOG6 (ORCPT ); Wed, 22 Apr 2020 10:06:58 -0400 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 4EB9D30E; Wed, 22 Apr 2020 07:06:58 -0700 (PDT) Received: from bogus (unknown [10.37.12.118]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2F2583F68F; Wed, 22 Apr 2020 07:06:56 -0700 (PDT) Date: Wed, 22 Apr 2020 15:06:53 +0100 From: Sudeep Holla To: Peter Zijlstra Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, rostedt@goodmis.org, qais.yousef@arm.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, daniel.lezcano@linaro.org Subject: Re: [PATCH 06/23] sched,psci: Convert to sched_set_fifo*() Message-ID: <20200422140653.GG24150@bogus> References: <20200422112719.826676174@infradead.org> <20200422112831.574539982@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200422112831.574539982@infradead.org> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 22, 2020 at 01:27:25PM +0200, Peter Zijlstra wrote: > Because SCHED_FIFO is a broken scheduler model (see previous patches) > take away the priority field, the kernel can't possibly make an > informed decision. > > Effectively changes prio from 99 to 50. > > XXX this thing is horrific, it basically open-codes a stop-machine and > idle. > > Cc: daniel.lezcano@linaro.org > Cc: sudeep.holla@arm.com Tested the PSCI checker pulling the entire series. Continues to work :) Tested-by: Sudeep Holla -- Regards, Sudeep