From mboxrd@z Thu Jan 1 00:00:00 1970 From: Izik Eidus Subject: Re: [PATCH 2/4] Add replace_page(), change the mapping of pte from one page into another Date: Tue, 11 Nov 2008 23:37:53 +0200 Message-ID: <4919FB31.7090506@redhat.com> References: <1226409701-14831-1-git-send-email-ieidus@redhat.com> <1226409701-14831-2-git-send-email-ieidus@redhat.com> <1226409701-14831-3-git-send-email-ieidus@redhat.com> <20081111114555.eb808843.akpm@linux-foundation.org> <4919F1C0.2050009@redhat.com> <4919F7EE.3070501@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org, kvm@vger.kernel.org, aarcange@redhat.com, chrisw@redhat.com, avi@redhat.com, izike@qumranet.com To: Christoph Lameter Return-path: Received: from mx2.redhat.com ([66.187.237.31]:34044 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750772AbYKKVix (ORCPT ); Tue, 11 Nov 2008 16:38:53 -0500 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: Christoph Lameter wrote: > > > Currently page migration assumes that the page will continue to be part > of the existing file or anon vma. > exactly, and ksm really need it to get out of the existing anon vma! > What you want sounds like assigning a swap pte to an anonymous page? That > way a anon page gains membership in a file backed mapping. > > > No, i want pte that is found inside vma and point to anonymous page, will stop point into the anonymous page and will point to a whole diffrent page that i chose (for ksm it is needed because this way we are mapping alot of ptes into the same write_protected page and save memory)