Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754309AbcCDBvL (ORCPT ); Thu, 3 Mar 2016 20:51:11 -0500 Received: from mga01.intel.com ([192.55.52.88]:50314 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750794AbcCDBvK (ORCPT ); Thu, 3 Mar 2016 20:51:10 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,533,1449561600"; d="scan'208";a="916549207" From: Lan Tianyu To: gleb@kernel.org, pbonzini@redhat.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org Cc: Lan Tianyu , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] KVM: Remove redundant smp_mb() in the kvm_mmu_commit_zap_page() Date: Fri, 4 Mar 2016 09:35:12 +0800 Message-Id: <1457055312-27067-1-git-send-email-tianyu.lan@intel.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 709 Lines: 27 The following kvm_flush_remote_tlbs() will call smp_mb() inside and so remove smp_mb() here. Signed-off-by: Lan Tianyu --- arch/x86/kvm/mmu.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index a54ecd9..6315416 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -2383,12 +2383,6 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm, return; /* - * wmb: make sure everyone sees our modifications to the page tables - * rmb: make sure we see changes to vcpu->mode - */ - smp_mb(); - - /* * Wait for all vcpus to exit guest mode and/or lockless shadow * page table walks. */ -- 1.8.4.rc0.1.g8f6a3e5.dirty