Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752641AbZLAO5C (ORCPT ); Tue, 1 Dec 2009 09:57:02 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752063AbZLAO5B (ORCPT ); Tue, 1 Dec 2009 09:57:01 -0500 Received: from mx1.redhat.com ([209.132.183.28]:49661 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750929AbZLAO5A (ORCPT ); Tue, 1 Dec 2009 09:57:00 -0500 Message-ID: <4B152EA4.7080207@redhat.com> Date: Tue, 01 Dec 2009 16:56:36 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20090922 Fedora/3.0-3.9.b4.fc12 Thunderbird/3.0b4 MIME-Version: 1.0 To: Adam Litke CC: Rusty Russell , Anthony Liguori , virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: Re: virtio: Add memory statistics reporting to the balloon driver (V4) References: <1259597655.30369.2.camel@aglitke> In-Reply-To: <1259597655.30369.2.camel@aglitke> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1754 Lines: 40 On 11/30/2009 06:14 PM, Adam Litke wrote: > Changes since V3: > - Do not do endian conversions as they will be done in the host > - Report stats that reference a quantity of memory in bytes > - Minor coding style updates > > Changes since V2: > - Increase stat field size to 64 bits > - Report all sizes in kb (not pages) > - Drop anon_pages stat and fix endianness conversion > > Changes since V1: > - Use a virtqueue instead of the device config space > > When using ballooning to manage overcommitted memory on a host, a system for > guests to communicate their memory usage to the host can provide information > that will minimize the impact of ballooning on the guests. The current method > employs a daemon running in each guest that communicates memory statistics to a > host daemon at a specified time interval. The host daemon aggregates this > information and inflates and/or deflates balloons according to the level of > host memory pressure. This approach is effective but overly complex since a > daemon must be installed inside each guest and coordinated to communicate with > the host. A simpler approach is to collect memory statistics in the virtio > balloon driver and communicate them directly to the hypervisor. > > This patch enables the guest-side support by adding stats collection and > reporting to the virtio balloon driver. > > What about a spec update? Did that happen and I just missed it? -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/