From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <44C6B111.9010502@redhat.com> Date: Tue, 25 Jul 2006 20:02:25 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH] mm: inactive-clean list References: <1153167857.31891.78.camel@lappy> <44C30E33.2090402@redhat.com> <44C518D6.3090606@redhat.com> <44C68F0E.2050100@redhat.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Peter Zijlstra , linux-mm , linux-kernel List-ID: Christoph Lameter wrote: > On Tue, 25 Jul 2006, Rik van Riel wrote: > >>> An increment of a VM counter causes a state change in the hypervisor? >> Christoph, please read more than the first 5 words in each >> email before replying. > > Well, I read the whole thing before I replied and I could not figure this > one out. Maybe I am too dumb to understand. Could you please explain > yourself in more detail Page state transitions can be very expensive in a virtualized environment, so it would be good if we had fewer transitions. > I am also not sure why I should be running a hypervisor in the first place > and so I may not be up to date on the whole technology. You may not, but IMHO it would be good if whatever new VM things we implement in Linux would at least be virtualization friendly. Especially if that can be achieved without hurting native performance... -- "Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it." - Brian W. Kernighan -- 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