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=-2.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 E1344C47E49 for ; Tue, 29 Oct 2019 15:27:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B830F21721 for ; Tue, 29 Oct 2019 15:27:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cmpxchg-org.20150623.gappssmtp.com header.i=@cmpxchg-org.20150623.gappssmtp.com header.b="yON6aSpt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389947AbfJ2P1n (ORCPT ); Tue, 29 Oct 2019 11:27:43 -0400 Received: from mail-qt1-f195.google.com ([209.85.160.195]:37627 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731885AbfJ2P1n (ORCPT ); Tue, 29 Oct 2019 11:27:43 -0400 Received: by mail-qt1-f195.google.com with SMTP id g50so20789962qtb.4 for ; Tue, 29 Oct 2019 08:27:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=IaX9sKsjpPdSSUy9AahNEhXIeFC3ruEZOj8gXqHdNOc=; b=yON6aSptlWxQnB1NOO3MIdAVC5s9k6tL+2+axo3G/mV3WZQvPJyiy0ooi4nGW5E9HW E/he2s1tMULMYHKQctEfszNGnxx8BhhocSBiqqfEajny2czIY+z6W5VIvoBDmKer/Grm dUAwUvW54hV3lOYtPJhD3Y4T6TdZ2D38x9XhZkcD/mPUjrWe9jCrwV4VjiroYwFmDd6W F0RoKT+6tPvf6FOdvD8WzKrFIEbgdXjVgR+3lQhEgqAagm5zoW8zhe3cwXvZiBSCkf+j vTzShxaiPBorZ1NjksCiWvGoVJTfXDgNrxu76KS3tgM9/dFkw+kO0UlGa1q1E0xx6f+C sY6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=IaX9sKsjpPdSSUy9AahNEhXIeFC3ruEZOj8gXqHdNOc=; b=lr0JfpF1uQRhC/JZDyqrzeeqzlyZZcSRCZCQZhIRL4px24tRkoLDeMeZmljb8uSzGL UJbN0bxWZf1N80J3QP1GcZ25ON1MviPPvXu2mkl8UH/P7BfXBCStDPbAq28AX06Z6g/l B9DQgZmiZIx024ObxPzASxR4SRDoMBVxfWG12E6F0xnYy7aPT/6vbDXGBMOf2T75qSjI zlpNWvbd0D10e0XX7DiXN0FxQKydX1Fdad3X+mM0h8YqgY2m2gNxLWSq63Ef/ryT6qL8 lf1g6n25bOAT89P/6Br9hGvC6ohlILitjz6BCaHEZIKJQQmebXgCt5AcbcmsZYiN0ENd y/7A== X-Gm-Message-State: APjAAAUuGUVU6rHH+8yYP1E9otJ3H+C6iL5nhtcjV3e3iO2YNTjENDuQ Z2l7GAfA6iFUtSgQ7t291mFiXA== X-Google-Smtp-Source: APXvYqxNlKt3WrThbG7XbGaAd4zpBqVJ+bOempozXCLm9LT2jgDE9M88gCm6ijCz3K1Ul1o1a7VTZw== X-Received: by 2002:ac8:72cd:: with SMTP id o13mr5000311qtp.303.1572362862156; Tue, 29 Oct 2019 08:27:42 -0700 (PDT) Received: from localhost ([2620:10d:c091:500::7081]) by smtp.gmail.com with ESMTPSA id x9sm5041806qtp.83.2019.10.29.08.27.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2019 08:27:41 -0700 (PDT) Date: Tue, 29 Oct 2019 11:27:40 -0400 From: Johannes Weiner To: Michal Hocko Cc: Hillf Danton , linux-mm , Andrew Morton , linux-kernel , Matthew Wilcox , Shakeel Butt , Minchan Kim , Mel Gorman , Vladimir Davydov , Jan Kara Subject: Re: [RFC v2] mm: add page preemption Message-ID: <20191029152740.GB33522@cmpxchg.org> References: <20191026112808.14268-1-hdanton@sina.com> <20191029084153.GD31513@dhcp22.suse.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191029084153.GD31513@dhcp22.suse.cz> User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 29, 2019 at 09:41:53AM +0100, Michal Hocko wrote: > As already raised in the review of v1. There is no real life usecase > described in the changelog. I have also expressed concerns about how > such a reclaim would work in the first place (priority inversion, > expensive reclaim etc.). Until that is provided/clarified > > Nacked-by: Michal Hocko I second this. Nacked-by: Johannes Weiner