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=-7.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 AEA8CC10F13 for ; Tue, 16 Apr 2019 11:22:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C5762075B for ; Tue, 16 Apr 2019 11:22:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="2yfjI6NO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729119AbfDPLWp (ORCPT ); Tue, 16 Apr 2019 07:22:45 -0400 Received: from merlin.infradead.org ([205.233.59.134]:44612 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726408AbfDPLWo (ORCPT ); Tue, 16 Apr 2019 07:22:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=bQFFzCj/jaD20EmJdtH1it0DTuH3ObYi2ZrPEYdaRig=; b=2yfjI6NOc7fAfL0gmUqidNwqX 3E0EAlNqlCHHy3U924sGxxcWLFnhYMPUABs54S1L+GlS9BROzyFQaFmoIE8nhKXjwG72NvpwCmt1X WifGrVptfUjL7KoPNTrcpZBAQgjpnp7LV15b3D4Hj7+jHBuAEmE9EYYxOkYInnijOBh3BMHKWCtyo scxw5CDZFWrXCOkcqvYD4T99/7wjWiu8FP9hH7KnWN18jFrDKrfZ8ySguJIqQkIPSqNSiXQVF28LW vyoB9tn2aFJf1eM8n3CaQEVufRRzGzzzCNkFOLddrsWKD7Jls/Uggbui763pu1j7dGAm9PYBsICmH 2WSvNViXA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hGMAg-000238-HQ; Tue, 16 Apr 2019 11:22:39 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id C255129AC0E8C; Tue, 16 Apr 2019 13:22:35 +0200 (CEST) Date: Tue, 16 Apr 2019 13:22:35 +0200 From: Peter Zijlstra To: Sebastian Andrzej Siewior Cc: hpa@zytor.com, mingo@kernel.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, tglx@linutronix.de, john.ogness@linutronix.de, linux-tip-commits@vger.kernel.org Subject: Re: [tip:sched/core] sched/core: Document that RT task priorities are 1...99 Message-ID: <20190416112235.GU11158@hirez.programming.kicks-ass.net> References: <20190403210821.10916-1-bigeasy@linutronix.de> <20190416093634.GS11158@hirez.programming.kicks-ass.net> <20190416094727.xanzq5t2xjuflcbt@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190416094727.xanzq5t2xjuflcbt@linutronix.de> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 16, 2019 at 11:47:27AM +0200, Sebastian Andrzej Siewior wrote: > On 2019-04-16 11:36:34 [+0200], Peter Zijlstra wrote: > > On Tue, Apr 16, 2019 at 01:13:11AM -0700, tip-bot for Sebastian Andrzej Siewior wrote: > > > Commit-ID: 37a8f8590f307db8f8cfa62dfd82b3fc0978607c > > > Gitweb: https://git.kernel.org/tip/37a8f8590f307db8f8cfa62dfd82b3fc0978607c > > > Author: Sebastian Andrzej Siewior > > > AuthorDate: Wed, 3 Apr 2019 23:08:21 +0200 > > > Committer: Ingo Molnar > > > CommitDate: Tue, 16 Apr 2019 10:06:08 +0200 > > > > > > sched/core: Document that RT task priorities are 1...99 > > > > > > John identified three files which claim that RT task priorities start at > > > zero. As far as I understand, 0 is used for DL and has nothing to do > > > wihich RT priorities as identified by the RT policy. > > > > DL is -1, 0 is still very much FIFO/FF > > but it can't be set. The lowest we can set is 1. Is this a bug then? What cannot be set?