From patchwork Tue Aug 30 02:37:02 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiao Guangrong X-Patchwork-Id: 1111622 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p7U2ZHrg012244 for ; Tue, 30 Aug 2011 02:35:17 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752364Ab1H3Cev (ORCPT ); Mon, 29 Aug 2011 22:34:51 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:60120 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752253Ab1H3Ceu (ORCPT ); Mon, 29 Aug 2011 22:34:50 -0400 Received: from tang.cn.fujitsu.com (tang.cn.fujitsu.com [10.167.250.3]) by song.cn.fujitsu.com (Postfix) with ESMTP id 5892B170133; Tue, 30 Aug 2011 10:34:49 +0800 (CST) Received: from mailserver.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id p7U2Ym5h010242; Tue, 30 Aug 2011 10:34:48 +0800 Received: from localhost.localdomain ([10.167.225.99]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2011083010335040-33494 ; Tue, 30 Aug 2011 10:33:50 +0800 Message-ID: <4E5C4CCE.3040307@cn.fujitsu.com> Date: Tue, 30 Aug 2011 10:37:02 +0800 From: Xiao Guangrong User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Thunderbird/3.1.10 MIME-Version: 1.0 To: Avi Kivity CC: Marcelo Tosatti , LKML , KVM Subject: [PATCH v3 08/11] KVM: MMU: remove unnecessary kvm_mmu_free_some_pages References: <4E5C4C20.3000403@cn.fujitsu.com> In-Reply-To: <4E5C4C20.3000403@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-08-30 10:33:50, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2011-08-30 10:33:51, Serialize complete at 2011-08-30 10:33:51 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 30 Aug 2011 02:35:18 +0000 (UTC) In kvm_mmu_pte_write, we do not need to alloc shadow page, so calling kvm_mmu_free_some_pages is really unnecessary Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index f6de2fc..9ac0dc8 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -3589,7 +3589,6 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, */ mmu_topup_memory_caches(vcpu); spin_lock(&vcpu->kvm->mmu_lock); - kvm_mmu_free_some_pages(vcpu); ++vcpu->kvm->stat.mmu_pte_write; trace_kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE); if (gfn == vcpu->arch.last_pt_write_gfn