From mboxrd@z Thu Jan 1 00:00:00 1970 From: Samuel Thibault Subject: Really need to pin page tables? Date: Tue, 27 May 2008 11:17:04 +0100 Message-ID: <20080527101704.GN4335@implementation.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hello, In extras/mini-os/arch/x86/mm.c:new_pt_frame, Mini-OS pins its L1, L2, and L3 page tables. Does that really make a difference from the Hypervisor point of view? I mean, once L4 is pinned, pointing to these, and thus their content has been checked, is there any performance difference? Samuel