linux-kernel - Re: [PATCH] KVM: Remove redundant smp_mb() in the kvm_mmu_commit_zap

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Message-ID: <56E196AC.4030103@linux.intel.com>
Date:	Thu, 10 Mar 2016 23:45:48 +0800
From:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>
To:	Paolo Bonzini <pbonzini@...hat.com>,
	Lan Tianyu <tianyu.lan@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	gleb@...nel.org, mingo@...hat.com, hpa@...or.com, x86@...nel.org,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KVM: Remove redundant smp_mb() in the
 kvm_mmu_commit_zap_page()



On 03/10/2016 11:31 PM, Paolo Bonzini wrote:
>
>
> On 10/03/2016 16:26, Paolo Bonzini wrote:
>> Compared to smp_load_acquire(), smp_mb() adds an ordering between stores
>> and loads.
>
> Here, the ordering is load-store, hence...

Yes, this is why i put smp_mb() in the code. :)