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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 76B7BC43381 for ; Fri, 8 Mar 2019 02:28:18 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3C95020661 for ; Fri, 8 Mar 2019 02:28:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C95020661 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id CD93C8E0004; Thu, 7 Mar 2019 21:28:17 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C89668E0002; Thu, 7 Mar 2019 21:28:17 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BB0F08E0004; Thu, 7 Mar 2019 21:28:17 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) by kanga.kvack.org (Postfix) with ESMTP id 8E6908E0002 for ; Thu, 7 Mar 2019 21:28:17 -0500 (EST) Received: by mail-qt1-f199.google.com with SMTP id m34so17319233qtb.14 for ; Thu, 07 Mar 2019 18:28:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-original-authentication-results:x-gm-message-state:date:from:to :cc:subject:message-id:references:mime-version:content-disposition :in-reply-to; bh=zKK43uCcWqjLoLEJvg2c7OBgge7uFgnGW1Yv+ah7HRo=; b=hz3fCZQyESjI8YjzqAr4ywmlYGJWuDygkYXPXiSxBFD+8eQ2at78e7unNgQ4Jd70ox UN4+Bh9lu6uGvE5zFkl5QD0Zb9JM4Hm96PRoCp3PMUSbqQAFhEVoPDDH8NbbHTbBIyYo /WMdXvZHMOxxLQBudYvDHMpoe3MzcN/XUsI4exzprb2RifS6V2P/7ThTHkbw14zh8GCq gntWjzACyUBobryRF/MqNN4rhxgamC+ZXgOj462kz5U8mlaMfVS/n07ijnZZEOl9Ud2p KE6SOoYi63DxvUKrfz1/DbMQ8I6Axe2645DNj447h1YnWn66A+NmeMuurgrL/PAk0DJ0 sSxA== X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of mst@redhat.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=mst@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com X-Gm-Message-State: APjAAAUucNBVp8GzB52OfSnDDRjrLh7WSksH0uwcGgocReGnH2qCD1Em fBF9eoVrH+SPhyqbV9wlPMwhEYm+5O6ursqZwgTGKYnH76DoX7d7+IqLF0jK0Qbo6+9/iIfxsv1 zflz7ZDbtbNH0adkUJI9hH0QuUhnHT9n0jBK7LBt+C7e5In/sTfpIwwzjDJMO/hBYEtAly1ZYRx QKd3CjuiGDXoVcxU9+peC19pbknjO1wQXOzAMczHRfNJNE1IBxLZOmtDzcj6Ehbzcl46XXEElu6 Fs7sr8ReM63lAI9gf+ez1qyYFI/yNtiZNA4bAeoQN4y5VXLupbi+5oRjIXFwlfGXf8d/XCQeprZ q1NOPZ9YNh6uC3pCEGyjtCEMPBCXa+rFp/T7VfjQCPlGmhkF523mKztdv9h3iNTsb53s4DOs3Sy J X-Received: by 2002:aed:3904:: with SMTP id l4mr12614726qte.194.1552012097369; Thu, 07 Mar 2019 18:28:17 -0800 (PST) X-Received: by 2002:aed:3904:: with SMTP id l4mr12614705qte.194.1552012096836; Thu, 07 Mar 2019 18:28:16 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1552012096; cv=none; d=google.com; s=arc-20160816; b=RRseBNTekYPDwAVRocgtgOWhiNwPq1Gul1Oi/R6V6h6pXed3jegzBBlqLA8ZpwGMyT XeBmIp2BUHXrrlhcG3Zl7rB4TWXqS+/zdbevVJqE50cxS1dUJ4gx7Evh7jhFVyQcqhAw d0SGR2UPlR/HDTatWoKb4WviN64DOZ6c2OeoX+8NWSPDw9VBowEovaYZxs+a2+UvzBLL BNDWAGmdy+e5GxPRaepNTpAqOLUxdE5hr8BkBihQ0eSG+vufrIPNTs31vlkRtmo12kdj MZ0R07VwPEDXk87H2OTRp6KQOBnPk1Xf2STD2lCrv3S4uqWF+8Qwxc4Vyi40sfdxEyO/ Py5w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date; bh=zKK43uCcWqjLoLEJvg2c7OBgge7uFgnGW1Yv+ah7HRo=; b=r65nu2tgBAeBsqQPhtmKExUKmYXpH5BZQxGXhfQb66PFpd55k+FC5wGg/0svAjKuIy URGH+vzI/LyviliRy2H3FexlhAW1qusOCO+p5otjFCNgeIqyOrEzhAhm40FMq2VubgYu V/3SfzoZ4di6kAqeSytJbfrWDMOxx4QpgL0GO0RyzPL1PHtdMVmpyBtVdxCZHhBti5K/ pIjHQc+HnYnNsOT1UMG/muDENFpMxHtmFqJazYp2TXijt17skwIUbixDwUsZiMnss6t9 1UnjHOhQdCBy7g3Lls1XFGRv8KYoJ3FFLdBLjpin+Xrx1/kdQwHD1BrOfoiFTssHOGoY E7kQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of mst@redhat.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=mst@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id i91sor7984491qtb.30.2019.03.07.18.28.16 for (Google Transport Security); Thu, 07 Mar 2019 18:28:16 -0800 (PST) Received-SPF: pass (google.com: domain of mst@redhat.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; spf=pass (google.com: domain of mst@redhat.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=mst@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com X-Google-Smtp-Source: APXvYqyRVLMras7lNSpHauaLLOEtnihh5o2zR9sVHmfKIk3hSYOwwHqHO8+Xizp0FcO/cSqhDNSk4Q== X-Received: by 2002:ac8:2297:: with SMTP id f23mr1534205qta.348.1552012096590; Thu, 07 Mar 2019 18:28:16 -0800 (PST) Received: from redhat.com (pool-173-76-246-42.bstnma.fios.verizon.net. [173.76.246.42]) by smtp.gmail.com with ESMTPSA id x43sm4586211qtc.10.2019.03.07.18.28.14 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 07 Mar 2019 18:28:15 -0800 (PST) Date: Thu, 7 Mar 2019 21:28:13 -0500 From: "Michael S. Tsirkin" To: Alexander Duyck Cc: David Hildenbrand , Nitesh Narayan Lal , kvm list , LKML , linux-mm , Paolo Bonzini , lcapitulino@redhat.com, pagupta@redhat.com, wei.w.wang@intel.com, Yang Zhang , Rik van Riel , dodgen@google.com, Konrad Rzeszutek Wilk , dhildenb@redhat.com, Andrea Arcangeli Subject: Re: [RFC][Patch v9 2/6] KVM: Enables the kernel to isolate guest free pages Message-ID: <20190307212654-mutt-send-email-mst@kernel.org> References: <20190306155048.12868-1-nitesh@redhat.com> <20190306155048.12868-3-nitesh@redhat.com> <2d9ae889-a9b9-7969-4455-ff36944f388b@redhat.com> <22e4b1cd-38a5-6642-8cbe-d68e4fcbb0b7@redhat.com> <78b604be-2129-a716-a7a6-f5b382c9fb9c@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Mar 07, 2019 at 02:35:53PM -0800, Alexander Duyck wrote: > With us hinting currently on MAX_ORDER - 1 pages only that actually > takes care of the risk of a merge really wiping out any data about > what has been hinted on and what hasn't. Oh nice. I had this feeling MAX_ORDER - 1 specifically will turn out being a better choice than something related to THP. Now there's an actual reason why this makes things easier! -- MST