linux-kernel - Re: [PATCH 07/10] KVM: x86: MMU: Encapsulate the type of rmap-chain head in a new struct

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Message-ID: <564C402C.8030503@redhat.com>
Date:	Wed, 18 Nov 2015 10:09:00 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Xiao Guangrong <guangrong.xiao@...ux.intel.com>,
	Takuya Yoshikawa <yoshikawa_takuya_b1@....ntt.co.jp>
Cc:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] KVM: x86: MMU: Encapsulate the type of rmap-chain
 head in a new struct



On 18/11/2015 04:21, Xiao Guangrong wrote:
> 
> 
> On 11/12/2015 07:55 PM, Takuya Yoshikawa wrote:
>> @@ -1720,7 +1724,7 @@ static struct kvm_mmu_page
>> *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu,
>>        * this feature. See the comments in kvm_zap_obsolete_pages().
>>        */
>>       list_add(&sp->link, &vcpu->kvm->arch.active_mmu_pages);
>> -    sp->parent_ptes = 0;
>> +    sp->parent_ptes.val = 0;
> 
> The sp is allocated from kmem_cache_zalloc() so explicitly initialize it
> to zero is not needed.

Right, but it should be a separate patch.

Takuya, since you are going to send another version of this series, can
you also:

1) move this patch either to the beginning or to the end

2) include "KVM: x86: always set accessed bit in shadow PTEs", also near
the beginning of the series?

Thanks!

Paolo
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