From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: [PATCH 08/31] nVMX: Fix local_vcpus_link handling Date: Tue, 17 May 2011 11:42:57 -0300 Message-ID: <20110517144257.GA6622@amt.cnet> References: <1305575004-nyh@il.ibm.com> <201105161948.p4GJm1as001742@rice.haifa.ibm.com> <20110517131918.GA3809@amt.cnet> <4DD27998.1040105@redhat.com> <20110517143532.GA2490@fermat.math.technion.ac.il> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Avi Kivity , kvm@vger.kernel.org, gleb@redhat.comqg To: "Nadav Har'El" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:1026 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755176Ab1EQOnI (ORCPT ); Tue, 17 May 2011 10:43:08 -0400 Content-Disposition: inline In-Reply-To: <20110517143532.GA2490@fermat.math.technion.ac.il> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, May 17, 2011 at 05:35:32PM +0300, Nadav Har'El wrote: > On Tue, May 17, 2011, Avi Kivity wrote about "Re: [PATCH 08/31] nVMX: Fix local_vcpus_link handling": > > static DEFINE_PER_CPU(struct list_head, vmcss_on_cpu); > > This is an interesting suggestion. My initial plan was to do something similar > to this, and I agree it could have been nicer code, but I had to change it > after bumping into too many obstacles. > > For example, currently, vmclear_local_vcpus() not only VMCLEARs the vmcss, > it also sets vmx->vcpu.cpu = -1, xmv->launched=0 for the vcpus holding these > VMCSs. If we had only a list of VMCSs, how can we mark the vcpus as being not > currently loaded (cpu=-1)? Do it in vcpu_clear, its just an optimization not necessary in vmclear_local_vcpus path.