From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-oi0-f70.google.com (mail-oi0-f70.google.com [209.85.218.70]) by kanga.kvack.org (Postfix) with ESMTP id 8C5646B0006 for ; Thu, 1 Feb 2018 11:04:10 -0500 (EST) Received: by mail-oi0-f70.google.com with SMTP id j68so9447505oih.14 for ; Thu, 01 Feb 2018 08:04:10 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id o29si7263647otd.84.2018.02.01.08.04.09 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 01 Feb 2018 08:04:09 -0800 (PST) Date: Thu, 1 Feb 2018 18:03:52 +0200 From: "Michael S. Tsirkin" Subject: Re: [virtio-dev] Re: [PATCH v25 2/2] virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT Message-ID: <20180201175115-mutt-send-email-mst@kernel.org> References: <1516871646-22741-1-git-send-email-wei.w.wang@intel.com> <1516871646-22741-3-git-send-email-wei.w.wang@intel.com> <20180125154708-mutt-send-email-mst@kernel.org> <5A6A871C.6040408@intel.com> <20180126042649-mutt-send-email-mst@kernel.org> <5A6AA107.3000607@intel.com> <20180131011423-mutt-send-email-mst@kernel.org> <5A72E13A.9030701@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5A72E13A.9030701@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Wei Wang Cc: "virtio-dev@lists.oasis-open.org" , "linux-kernel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "kvm@vger.kernel.org" , "linux-mm@kvack.org" , "mhocko@kernel.org" , "akpm@linux-foundation.org" , "pbonzini@redhat.com" , "liliang.opensource@gmail.com" , "yang.zhang.wz@gmail.com" , "quan.xu0@gmail.com" , "nilal@redhat.com" , "riel@redhat.com" On Thu, Feb 01, 2018 at 05:43:22PM +0800, Wei Wang wrote: > 3) Hints means the pages are quite likely to be free pages (no guarantee). > If the pages given to host are going to be freed, then we really couldn't > call them hints, they are true free pages. Ballooning needs true free pages, > while live migration needs hints, would you agree with this? It's an interesting point, I'm convinced by it. -- MST -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org