From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757322AbZHZKig (ORCPT ); Wed, 26 Aug 2009 06:38:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757056AbZHZKaM (ORCPT ); Wed, 26 Aug 2009 06:30:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49367 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756660AbZHZKaJ (ORCPT ); Wed, 26 Aug 2009 06:30:09 -0400 From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 02/47] KVM: MMU: make __kvm_mmu_free_some_pages handle empty list Date: Wed, 26 Aug 2009 13:29:24 +0300 Message-Id: <1251282609-12835-3-git-send-email-avi@redhat.com> In-Reply-To: <1251282609-12835-1-git-send-email-avi@redhat.com> References: <1251282609-12835-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Izik Eidus First check if the list is empty before attempting to look at list entries. Signed-off-by: Izik Eidus Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity --- arch/x86/kvm/mmu.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 1249c12..28be35c 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2705,7 +2705,8 @@ EXPORT_SYMBOL_GPL(kvm_mmu_unprotect_page_virt); void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu) { - while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES) { + while (vcpu->kvm->arch.n_free_mmu_pages < KVM_REFILL_PAGES && + !list_empty(&vcpu->kvm->arch.active_mmu_pages)) { struct kvm_mmu_page *sp; sp = container_of(vcpu->kvm->arch.active_mmu_pages.prev, -- 1.6.4.1