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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 83B44C352A4 for ; Wed, 12 Feb 2020 21:32:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4C03B2465D for ; Wed, 12 Feb 2020 21:32:53 +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="q5RYRX42" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729054AbgBLVcw (ORCPT ); Wed, 12 Feb 2020 16:32:52 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:47356 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727564AbgBLVcw (ORCPT ); Wed, 12 Feb 2020 16:32:52 -0500 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; bh=62yXb7kO6TJItSD02Iyixn2SKX2PdulFGZN/QvehXUg=; b=q5RYRX42TPN9Oi7y9IkQKuSF2E tbIRdTFpijBPubabgk+LuJXJ9H5ZsDP33NNlcytmEkzwDsVcQYylkc/knhRDRjk3OeDy2rYfL5kAC xxLJJGqB4RIIq1a76bGWkDNl5jWqy1+m9mB2W4oLzqSn2EnTJtIz80KRAkL29vC28i9sm/EwIbGAH 1RLVwsLBvqjN1NmUZF61mcxs81ZgvaqgmSkaWBIexyL8JHIiik38QZZHYDwBeksPu9X1OR8qoAka4 jfb1V4ZPWz8NkD67huGn/uuvnj2A1atOBkMmywi9kjW0h2F2NQmgxATQ7g3bG8teJ2A8YJ1Wb8Bk8 rpRJbgPw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1zcp-0008Gk-Ci; Wed, 12 Feb 2020 21:32:51 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 1E12D300679; Wed, 12 Feb 2020 22:30:59 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 6C41920206D70; Wed, 12 Feb 2020 22:32:48 +0100 (CET) Date: Wed, 12 Feb 2020 22:32:48 +0100 From: Peter Zijlstra To: Tejun Heo Cc: Prateek Sood , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] cpuset: Make cpuset hotplug synchronous Message-ID: <20200212213248.GE14897@hirez.programming.kicks-ass.net> References: <1579878449-10164-1-git-send-email-prsood@codeaurora.org> <20200212211832.GC80993@mtj.thefacebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200212211832.GC80993@mtj.thefacebook.com> 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 Wed, Feb 12, 2020 at 04:18:32PM -0500, Tejun Heo wrote: > On Sat, Feb 01, 2020 at 08:33:34AM +0530, Prateek Sood wrote: > > Hi Tejun & Peter, > > > > Could you please share your feedback on this patch for making > > > > cpuset_hotplug_workfn synchronous. > > Hey, IIRC, we went back forth with this several times. Unless there's > a pressing reason to change, I'd rather leave it alone. I think I have a similar patch in one of the many in-progress series I keep around; IIRC it is the one where I add per-cpu support to SCHED_DEADLINE. The hotplug accounting becomes easier if we do this. Sadly this series is fairly low on the todo list atm though :/ I have no problems keeping it around until such a time though.