From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH 2/5] KVM: x86: do not scan IRR twice on APICv vmentry Date: Thu, 3 Nov 2016 15:53:44 +0200 Message-ID: <20161103155249-mutt-send-email-mst@kernel.org> References: <1476469291-5039-1-git-send-email-pbonzini@redhat.com> <1476469291-5039-3-git-send-email-pbonzini@redhat.com> <20161026195900.GC4212@potion> <00273a1a-ef5d-f814-3e02-24b4e855d229@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Cc: Radim =?utf-8?B?S3LEjW3DocWZ?= , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, yang.zhang.wz@gmail.com, feng.wu@intel.com To: Paolo Bonzini Return-path: Content-Disposition: inline In-Reply-To: <00273a1a-ef5d-f814-3e02-24b4e855d229@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Thu, Nov 03, 2016 at 02:30:31PM +0100, Paolo Bonzini wrote: > > > On 26/10/2016 21:59, Radim Krčmář wrote: > > 2016-10-14 20:21+0200, Paolo Bonzini: > >> Calling apic_find_highest_irr results in IRR being scanned twice, > >> once in vmx_sync_pir_from_irr and once in apic_search_irr. Change > >> sync_pir_from_irr to do the RVI write and kvm_apic_update_irr to > >> compute the new RVI on the fly. > >> > >> Signed-off-by: Paolo Bonzini > >> --- > > > > Reviewed-by: Radim Krčmář > > Nope, this breaks nested VMX exit on external interrupt. For now I'm > testing only patch 1 and will push that one only to kvm/next. > > Paolo Do you know why? I don't see it yet.