Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753329Ab0DLRMs (ORCPT ); Mon, 12 Apr 2010 13:12:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59065 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753383Ab0DLRMn (ORCPT ); Mon, 12 Apr 2010 13:12:43 -0400 Date: Mon, 12 Apr 2010 14:10:37 -0300 From: Marcelo Tosatti To: Xiao Guangrong Cc: Avi Kivity , KVM list , LKML Subject: Re: [PATCH 2/6] KVM MMU: fix kvm_mmu_zap_page() and its calling path Message-ID: <20100412171037.GB4976@amt.cnet> References: <4BC2D2E2.1030604@cn.fujitsu.com> <4BC2D345.100@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4BC2D345.100@cn.fujitsu.com> User-Agent: Mutt/1.5.20 (2009-08-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1823 Lines: 52 On Mon, Apr 12, 2010 at 04:01:09PM +0800, Xiao Guangrong wrote: > - calculate zapped page number properly in mmu_zap_unsync_children() > - calculate freeed page number properly kvm_mmu_change_mmu_pages() > - restart list walking if have children page zapped > > Signed-off-by: Xiao Guangrong > --- > arch/x86/kvm/mmu.c | 7 ++++--- > 1 files changed, 4 insertions(+), 3 deletions(-) > > diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c > index a23ca75..8f4f781 100644 > --- a/arch/x86/kvm/mmu.c > +++ b/arch/x86/kvm/mmu.c > @@ -1483,8 +1483,8 @@ static int mmu_zap_unsync_children(struct kvm *kvm, > for_each_sp(pages, sp, parents, i) { > kvm_mmu_zap_page(kvm, sp); > mmu_pages_clear_parents(&parents); > + zapped++; > } > - zapped += pages.nr; > kvm_mmu_pages_init(parent, &parents, &pages); > } Don't see why this is needed? The for_each_sp loop uses pvec.nr. > @@ -1540,7 +1540,7 @@ void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages) > > page = container_of(kvm->arch.active_mmu_pages.prev, > struct kvm_mmu_page, link); > - kvm_mmu_zap_page(kvm, page); > + used_pages -= kvm_mmu_zap_page(kvm, page); > used_pages--; > } > kvm->arch.n_free_mmu_pages = 0; Oops. > @@ -1589,7 +1589,8 @@ static void mmu_unshadow(struct kvm *kvm, gfn_t gfn) > && !sp->role.invalid) { > pgprintk("%s: zap %lx %x\n", > __func__, gfn, sp->role.word); > - kvm_mmu_zap_page(kvm, sp); > + if (kvm_mmu_zap_page(kvm, sp)) > + nn = bucket->first; Oops 2. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/