From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: remove redundant VM Exit for non-aligned guest pte write or part of pte write. Date: Thu, 20 Dec 2007 11:21:58 +0200 Message-ID: <476A3436.1000900@qumranet.com> References: <10EA09EFD8728347A513008B6B0DA77A028A6DB2@pdsmsx411.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel To: "Dong, Eddie" Return-path: In-Reply-To: <10EA09EFD8728347A513008B6B0DA77A028A6DB2-wq7ZOvIWXbNpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Dong, Eddie wrote: > I observed 1-2 seconds faster in Windows XPSP2 ACPI bootup with total of > 23 seconds. > I can;t say it is exactly caused by this patch, but anyway it simplifies > the logic and > code w/o any additional complexity. > thx,eddie > > > Patch looks good, but will delay so that the guest scaling patch can be merged. kvm_read_guest() will need to change to kvm_read_guest_inatomic(), since the mmu is becoming spinlocked. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace