From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [PATCH] x86/hvm: accelerate IO intercept handling Date: Fri, 05 Mar 2010 15:55:17 +0000 Message-ID: References: <4B91281D.7010405@amd.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <4B91281D.7010405@amd.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Andre Przywara Cc: xen-devel List-Id: xen-devel@lists.xenproject.org On 05/03/2010 15:49, "Andre Przywara" wrote: >> Unless the speedup on the only >> possibly-interesting workload you mention is significant, this whole >> optimisation seems unnecessary. > Actually it is missing enablement. Yes it's very important to use *every* CPU feature. ;-) Well, the patch looks okay, and it may speed up things we care about a percent or two I guess. I will look at it properly after 4.0 and I'm sure we can get it in the tree. -- Keir