From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Magenheimer Subject: RE: "right" way to gather domU stats in xen 3 & 4? Date: Tue, 1 Mar 2011 08:32:58 -0800 (PST) Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Florian Heigl , Stefano Stabellini Cc: xen-devel List-Id: xen-devel@lists.xenproject.org > Any comment about tmem / baloon would still be great... why doesn't > anyone jump when our coolest features are mentioned? :) > I think it's important to make them visible to the general users... Hi Florian -- Tmem has no value without guest kernel changes and getting those changes (even though very small) into the Linux kernel has proven to be a very long frustrating experience, which I hope will finally come to fruition soon. Once in the upstream kernel, distro domUs will still need to merge and enable these changes. A couple of key things to plan for in your management tools: 1) Don't assume that the amount of memory used by a guest is fixed and/or only under the control of your tools. 2) When tmem is in use, make sure you understand the difference between "free memory" and "freeable memory". Dan