From: Lan Tianyu <tianyu.lan@intel.com>
To: gleb@kernel.org, pbonzini@redhat.com, guangrong.xiao@linux.intel.com
Cc: Lan Tianyu <tianyu.lan@intel.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/7] KVM: Replace smp_mb() with smp_mb_after_atomic() in the kvm_make_all_cpus_request()
Date: Sun, 13 Mar 2016 11:10:26 +0800 [thread overview]
Message-ID: <1457838631-26775-4-git-send-email-tianyu.lan@intel.com> (raw)
In-Reply-To: <1457838631-26775-1-git-send-email-tianyu.lan@intel.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
virt/kvm/kvm_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 1eae052..ec5aa8d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -170,8 +170,8 @@ bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req)
kvm_make_request(req, vcpu);
cpu = vcpu->cpu;
- /* Set ->requests bit before we read ->mode */
- smp_mb();
+ /* Set ->requests bit before we read ->mode. */
+ smp_mb__after_atomic();
if (cpus != NULL && cpu != -1 && cpu != me &&
kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE)
--
1.8.4.rc0.1.g8f6a3e5.dirty
next prev parent reply other threads:[~2016-03-13 3:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-13 3:10 [PATCH 0/7] KVM/X86/PPC: Clear up kvm mmu memory barriers and update related comments Lan Tianyu
2016-03-13 3:10 ` [PATCH 1/7] KVM: Remove redundant smp_mb() in the kvm_mmu_commit_zap_page() Lan Tianyu
2016-03-13 3:10 ` [PATCH 2/7] KVM/x86: Replace smp_mb() with smp_store_mb/release() in the walk_shadow_page_lockless_begin/end() Lan Tianyu
2016-03-13 3:10 ` Lan Tianyu [this message]
2016-03-13 3:10 ` [PATCH 4/7] KVM/x86: Call smp_wmb() before increasing tlbs_dirty Lan Tianyu
2016-03-13 3:10 ` [PATCH 5/7] KVM: Replace smp_mb() with smp_load_acquire() in the kvm_flush_remote_tlbs() Lan Tianyu
2016-03-13 3:10 ` [PATCH 6/7] KVM/x86: update the comment of memory barrier in the vcpu_enter_guest() Lan Tianyu
2016-03-13 3:10 ` [PATCH 7/7] KVM/PPC: update the comment of memory barrier in the kvmppc_prepare_to_enter() Lan Tianyu
2016-03-14 13:03 ` [PATCH 0/7] KVM/X86/PPC: Clear up kvm mmu memory barriers and update related comments Paolo Bonzini
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