Received: by 10.192.165.148 with SMTP id m20csp3501817imm; Mon, 23 Apr 2018 07:37:38 -0700 (PDT) X-Google-Smtp-Source: AIpwx49EXb9QHyI5sykQQT6yH04qLrywc8zlmG3uDHp6RWNnpud3rE545p/gJcmWIkMVGNAZkuVZ X-Received: by 10.99.122.5 with SMTP id v5mr17240674pgc.184.1524494258012; Mon, 23 Apr 2018 07:37:38 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1524494257; cv=none; d=google.com; s=arc-20160816; b=g5M1QrYzXuxAxajj3Xu48qryV1pw2fF89+tshRFvTElBRYQc2K69xFj3UXlCHLRjxr qZZGOv7wkqoZiKh4Hlh1kTMLSXeR/5cXXaDgfTOQy4SybpW/Py7FeROFBoq6iqr7Qm+z 6hcIH6pYjb39Q6+bdp338pbcbUsdEXk78Ygo/BMr7S/jfE39umNTaNOjghZlnXu5iE7a c/P5OPtPQMEV0k/LDHshtY+NBuSHE1ibrjxRsL7LP2vuimzF72IQKD/PX18LkEL8Tiet LvNe4BVogD16MVIotuMytRD1b5bwfDkoyStSiXLdnetMO2c9lFNigu//5TPs0QuRlElC dENQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date :dmarc-filter:arc-authentication-results; bh=4+dQ07kgfiga82QDG5y6y1+Lb03hFq5A1TMgu1B99Ik=; b=kVeBmW5MbG7fiDIJ7SbZ3B/w3rGtI3z6s9Me9VyMxziCRAfwKvjc8j242Xfg3eUDla x4WR0uteHxjgLWjCtkSYtrVqeIoL/g21m/bKTXsWsygB03PjM6UgHZ6rtgF31Zt+pExH r+l/8uUI9Re3F00lSvdvahOrsg2yhjX/9AVwkOERxXEVzQx4r2P58wWPGxhb6XKjb1PP rTqIbzF02BGHPCFLdHKP2dNglTkLCnCicsI8Vbk4ZA3IJ9Tw50I+MyxChjTspap6HkkO JTeqkSW/D6YRii0VVNjJqB5qPlSmF/+JMFqkUcSzTSoe1l2Yx6BYkC9dLFi+2mQs88SS Cbdw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id d127si93159pgc.236.2018.04.23.07.37.23; Mon, 23 Apr 2018 07:37:37 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755605AbeDWOff (ORCPT + 99 others); Mon, 23 Apr 2018 10:35:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:39446 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755384AbeDWOfd (ORCPT ); Mon, 23 Apr 2018 10:35:33 -0400 Received: from gandalf.local.home (cpe-66-24-56-78.stny.res.rr.com [66.24.56.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 40D2220C51; Mon, 23 Apr 2018 14:35:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 40D2220C51 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=rostedt@goodmis.org Date: Mon, 23 Apr 2018 10:35:29 -0400 From: Steven Rostedt To: Peter Zijlstra Cc: "Paul E. McKenney" , linux-kernel@vger.kernel.org, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel.opensrc@gmail.com Subject: Re: [PATCH tip/core/rcu 01/22] sched: Make non-production PREEMPT cond_resched() help Tasks RCU Message-ID: <20180423103529.36848ae1@gandalf.local.home> In-Reply-To: <20180423141038.GA4064@hirez.programming.kicks-ass.net> References: <20180423023150.GA21533@linux.vnet.ibm.com> <1524450747-22778-1-git-send-email-paulmck@linux.vnet.ibm.com> <20180423085127.GR4064@hirez.programming.kicks-ass.net> <20180423124000.GL26088@linux.vnet.ibm.com> <20180423094742.6582e19d@gandalf.local.home> <20180423141038.GA4064@hirez.programming.kicks-ass.net> X-Mailer: Claws Mail 3.16.0 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 23 Apr 2018 16:10:38 +0200 Peter Zijlstra wrote: > > http://lkml.kernel.org/r/20180227153646.GD3777@linux.vnet.ibm.com > > That thread using cond_resched_task_rcu_qs() seems like a _lot_ better > than having cond_resched() semantics change depending on random > !scheduler config parameters. Yeah, I agree. Not sure why Paul didn't push it. Maybe because I never replied to that final email and he forgot? Paul? -- Steve