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=unavailable 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 9A13CC43381 for ; Fri, 8 Mar 2019 02:28:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71E7820851 for ; Fri, 8 Mar 2019 02:28:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726348AbfCHC2R (ORCPT ); Thu, 7 Mar 2019 21:28:17 -0500 Received: from mail-qt1-f196.google.com ([209.85.160.196]:36592 "EHLO mail-qt1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726242AbfCHC2R (ORCPT ); Thu, 7 Mar 2019 21:28:17 -0500 Received: by mail-qt1-f196.google.com with SMTP id p25so19691343qtb.3 for ; Thu, 07 Mar 2019 18:28:16 -0800 (PST) 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=zKK43uCcWqjLoLEJvg2c7OBgge7uFgnGW1Yv+ah7HRo=; b=JqNMnxSVe+OEAsRSz1w+nIKRVyO5phK7rPRzwOrN524mY3ILbBdlYKxsHrGZZ5Yiw1 llkbcAISvtkTNs+EJSGu5YsNTtQgi9etN56On/uL9v5vxDHCGXnvESY3E4pP+tCdkBo9 2h3mFo2cao94ewt7i42F696SDZEPR0inYIBC7WpPw4/MmOlYPxzc9Sflp9rTZFVlaZaJ 91ja2Djlc1dcWAwYrL5Z/8pGbOTlOrrtWYwLzsdbwV7xQuJGPntcUvu4SfUxSMCIIi+r PM4b+8F0RD2dsAI1o3J3nNMihz14DeauSe9p7mwY4a1yUvain2+E19an8Ti1y8Q942Y8 e3yA== X-Gm-Message-State: APjAAAXjT1kF6DcFzWxGGcIUqw886WAbha8AM60I26SKp6+Gsv4ZjxDu 9UsfQ3kbDpbGrzK+dvns1DWO7w== 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: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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