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=-5.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 86C93C47420 for ; Thu, 24 Sep 2020 15:08:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 376BB2344C for ; Thu, 24 Sep 2020 15:08:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="IEnrwnaS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728336AbgIXPIf (ORCPT ); Thu, 24 Sep 2020 11:08:35 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:33244 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728296AbgIXPIe (ORCPT ); Thu, 24 Sep 2020 11:08:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600960113; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=MQoQDFgY9yaaRRiEJU3spleYVLTHQmZvjCiRju5YF+Q=; b=IEnrwnaSlnAk+kuVAacWmmWO5mBqwgeed9VR4vWq0uwk0Gm7i9ljvfCIB6MpU8Dz+neHZ/ yvRMUyWfzxumjoSqbSA1H4YnzQJKjiVAlP0Meh4dUDnO033TnhTmsYJWIKTzw1qeCKnC3j rw2s0FmTdF6Ev1vNqp+flzI1rxBaQUY= Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-594-4uNmq2zHOfONkY5duQnPkA-1; Thu, 24 Sep 2020 11:08:30 -0400 X-MC-Unique: 4uNmq2zHOfONkY5duQnPkA-1 Received: by mail-qt1-f199.google.com with SMTP id a16so2654328qtj.7 for ; Thu, 24 Sep 2020 08:08:30 -0700 (PDT) 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; bh=MQoQDFgY9yaaRRiEJU3spleYVLTHQmZvjCiRju5YF+Q=; b=amWGzmLCvcIU24szuWUnOy4JQSbL457q64SWDTjQ8s/XFfSWoZd2QLztAXk3onq+Z3 uD/7C986fAWIJpoZcJ5NQNPbYXFjQGssB4+OxDp5LgNgxAsKA8TmjL30yUzCPdwIK+E8 dWcJRqgzal7+B6aViuoKXg+XkAaIQJWFJiTnmpPLtsR42UjI/ElYC0/Dry1GZV2kyfX6 rNGsltqm6KqLKx94GmxvsamAlr8Fz/d5jw4ochIb0IGOqjOu8wN9mAWycdN0K17CkB3B 2v9jI3D/NdRFeVyXc+sEOJ06NlCou/oUQHLUtc0bRRIAjAQIg/rfd9hvnGznbr8t4rsj gh8w== X-Gm-Message-State: AOAM532V0QsKAF3v5sw+9oTVaFk5mRpFbZvbVmzX1yDbWhGipuRP+yNH SOf51ElXPBJT2mCjA0ipgxuwph7xMHXaF71rIfO9y2d0/mcxLgE02vl1bNoCVyd5hgCzUQGE5Hd GVBWQ+rh9LhPHL/IIWOZ99EAt X-Received: by 2002:a05:620a:919:: with SMTP id v25mr46595qkv.461.1600960110108; Thu, 24 Sep 2020 08:08:30 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzPKyFUERco+7cJyYy2qb6iiaNZvQWTPdRkcsArJJYM6TktrNZefehjko3nxuDJ6Se8rtvUPA== X-Received: by 2002:a05:620a:919:: with SMTP id v25mr46579qkv.461.1600960109906; Thu, 24 Sep 2020 08:08:29 -0700 (PDT) Received: from xz-x1 (bras-vprn-toroon474qw-lp130-11-70-53-122-15.dsl.bell.ca. [70.53.122.15]) by smtp.gmail.com with ESMTPSA id w6sm2456247qti.63.2020.09.24.08.08.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2020 08:08:29 -0700 (PDT) Date: Thu, 24 Sep 2020 11:08:27 -0400 From: Peter Xu To: Linus Torvalds Cc: Oleg Nesterov , Linux-MM , Linux Kernel Mailing List , Michal Hocko , Kirill Shutemov , Jann Horn , Kirill Tkhai , Hugh Dickins , Leon Romanovsky , Jan Kara , John Hubbard , Christoph Hellwig , Andrew Morton , Jason Gunthorpe , Andrea Arcangeli Subject: Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes Message-ID: <20200924150827.GE79898@xz-x1> References: <20200921211744.24758-1-peterx@redhat.com> <20200921212028.25184-1-peterx@redhat.com> <20200922114839.GC11679@redhat.com> <20200922124013.GD11679@redhat.com> <20200922155842.GG19098@xz-x1> <20200922165216.GF11679@redhat.com> <20200922183438.GL19098@xz-x1> <20200922184359.GI11679@redhat.com> <20200923010332.GP19098@xz-x1> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 23, 2020 at 01:25:52PM -0700, Linus Torvalds wrote: > IOW, the third patch would be something (COMPLETELY UNTESTED) like the attached. Thanks. I'll rework on top. -- Peter Xu