From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: [PATCH 1/1 v2] KVM: Reduce mmu_lock contention during dirty logging by cond_resched() Date: Tue, 1 May 2012 00:07:40 -0300 Message-ID: <20120501030740.GB11921@amt.cnet> References: <20120428190544.7dc2bfd281054c1fcac5a14e@gmail.com> <20120428190754.5c27325da5663e5d8c9b9be1@gmail.com> <4F9D25A2.7020303@redhat.com> <20120429211759.0265df80d7193048344ff35b@gmail.com> <4F9D3B26.7090602@redhat.com> <20120429232407.684da454a0862f121754a126@gmail.com> <4F9D52A7.8020105@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Takuya Yoshikawa , kvm@vger.kernel.org, yoshikawa.takuya@oss.ntt.co.jp To: Avi Kivity Return-path: Received: from mx1.redhat.com ([209.132.183.28]:25484 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753410Ab2EADMO (ORCPT ); Mon, 30 Apr 2012 23:12:14 -0400 Content-Disposition: inline In-Reply-To: <4F9D52A7.8020105@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Sun, Apr 29, 2012 at 05:39:35PM +0300, Avi Kivity wrote: > On 04/29/2012 05:24 PM, Takuya Yoshikawa wrote: > > On Sun, 29 Apr 2012 15:59:18 +0300 > > Avi Kivity wrote: > > > > > > As we discussed before, we need to add some tricks to de-couple mmu_lock and > > > > TLB flush. > > > > > > Ok, let's discuss them (we can apply the patch independently). Do you > > > have something in mind? > > > > > > > How about your own idea? > > > > Looks pretty good, if I do say so myself. I'll take a shot at > implementing it. Decoupling would also simplify Xiao's lockless faults.