linux-kernel - Re: [PATCH 6/6] KVM: MMU: trace pte prefetch

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Message-ID: <4C19CE70.9000002@cn.fujitsu.com>
Date:	Thu, 17 Jun 2010 15:27:44 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	KVM list <kvm@...r.kernel.org>
Subject: Re: [PATCH 6/6] KVM: MMU: trace pte prefetch



Avi Kivity wrote:

>> @@ -2066,11 +2071,16 @@ static void direct_pte_prefetch(struct
>> kvm_vcpu *vcpu, u64 *sptep)
>>           pfn = gfn_to_pfn_atomic(vcpu->kvm, gfn);
>>           if (is_error_pfn(pfn)) {
>>               kvm_release_pfn_clean(pfn);
>> +            trace_pte_prefetch(true, PREFETCH_ERR_GFN2PFN);
>>               break;
>>           }
>>    
> 
> What about virtual addresses and gptes?  They can be helpful too.
> 

OK, will do it in the next version.

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