From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: PCI passthrough resource remapping Date: Wed, 07 Apr 2010 08:52:59 +0300 Message-ID: <4BBC1DBB.8010408@redhat.com> References: <3b1f68ef1003291600t1175f794vd3f47cdafca48a8@mail.gmail.com> <20100329234752.GM3204@x200.localdomain> <3b1f68ef1003291721v6fcb01edha4f0424ba0ab24f8@mail.gmail.com> <20100330020805.GS3204@x200.localdomain> <3b1f68ef1003301527p2dd9928alf2f6ead85d678634@mail.gmail.com> <20100330235838.GU11934@x200.localdomain> <3b1f68ef1003301747k675f0de0t1b8dec8581e3f4b2@mail.gmail.com> <4BB33F12.1060908@suse.de> <20100331151850.GC25786@x200.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Alexander Graf , Kenni Lund , kvm list To: Chris Wright Return-path: Received: from mx1.redhat.com ([209.132.183.28]:54659 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752549Ab0DGFxL (ORCPT ); Wed, 7 Apr 2010 01:53:11 -0400 In-Reply-To: <20100331151850.GC25786@x200.localdomain> Sender: kvm-owner@vger.kernel.org List-ID: On 03/31/2010 06:18 PM, Chris Wright wrote: > >> Hrm, I'm not sure these would be related to the small BAR region patch. >> It looks more like a timing issue. >> > small BAR == slow path == timing issue? > Would be interesting to verify using perf with the 'kvm:kvm_mmio' software event, see how many happen per second. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.