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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,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 65BF7C43219 for ; Tue, 30 Apr 2019 12:08:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2FB86205ED for ; Tue, 30 Apr 2019 12:08:03 +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="Nk7xzAVf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727651AbfD3MIB (ORCPT ); Tue, 30 Apr 2019 08:08:01 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:55924 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725947AbfD3MHz (ORCPT ); Tue, 30 Apr 2019 08:07:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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=ljvGw8ePwJU1BtvdBb7R72Czky3RJZItJhHXPlJxdKk=; b=Nk7xzAVf7JNy+7UJHbgBIyoht HgdUW3DVhipn0yyCVQhcoCtcE/Zfu5epcbiL6N6PUwNm6fV5RKdD1rzjWt4bckbO4dl4ZSqRavLeO ZBRGfsPBLkdlpiAsQL+wWFNpFLsGp7EFssmhhr9pSXtEoAQqZ2NZSWghOoTm9BuwqHb6AIChJbhQN P7XoEGEjJG0iME3GZoe9QbnFRLSjOyv8polIT/OhzZ5WF8G0BI1DBVlPLv1vu/xlSQ0XEgJpp3riY RhReKLQGUb+4yKW+U79uGDYaf7u1gjzXJFzCeIwAESYJVRj4Mhf7uRroQno5+DghOyq/doC/9J37t 7mvIbUZFw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hLRXy-0005J6-9F; Tue, 30 Apr 2019 12:07:46 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id C22AE203C05DB; Tue, 30 Apr 2019 14:07:40 +0200 (CEST) Date: Tue, 30 Apr 2019 14:07:40 +0200 From: Peter Zijlstra To: Nicholas Piggin Cc: Frederic Weisbecker , linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, Ingo Molnar , "Rafael J . Wysocki" , Thomas Gleixner Subject: Re: [PATCH v2 0/5] Allow CPU0 to be nohz full Message-ID: <20190430120740.GU2623@hirez.programming.kicks-ass.net> References: <20190411033448.20842-1-npiggin@gmail.com> <20190425120427.GS4038@hirez.programming.kicks-ass.net> <1556592099.38esq4uhhz.astroid@bobo.none> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1556592099.38esq4uhhz.astroid@bobo.none> 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 30, 2019 at 12:46:40PM +1000, Nicholas Piggin wrote: > Peter Zijlstra's on April 25, 2019 10:04 pm: > > On Thu, Apr 11, 2019 at 01:34:43PM +1000, Nicholas Piggin wrote: > >> Since last time, I added a compile time option to opt-out of this > >> if the platform does not support suspend on non-zero, and tried to > >> improve legibility of changelogs and explain the justification > >> better. > >> > >> I have been testing this on powerpc/pseries and it seems to work > >> fine (the firmware call to suspend can be called on any CPU and > >> resumes where it left off), but not included here because the > >> code has some bitrot unrelated to this series which I hacked to > >> fix. I will discuss it and either send an acked patch to go with > >> this series if it is small, or fix it in powerpc tree. > >> > > > > Rafael, Frederic, any comments? > > > > Sorry to ping again, I guess people are probably busy after vacation. > Any chance we could get this in next merge window? Peter are you okay > with the config option as it is, then we can look at adapting it to > what x86 needs as a follow up (e.g., allow nohz CPU0 for > cpu0_hotpluggable case)? Yeah, let me just queue these here patches. Not sure they'll still make the upcoming merge window, but we can try.