Avi Kivity wrote:
>> spin_lock(&vcpu->kvm->mmu_lock);
>> + index = kvm_page_table_hashfn(gfn);
>> + bucket =&vcpu->kvm->arch.mmu_page_hash[index];
>> + hlist_for_each_entry_safe(s, node, tmp, bucket, hash_link)
>> + if (s == sp) {
>> + if (s->gfn == gfn&& s->role.word == role.word)
>> + live = true;
>> + break;
>> + }
>> +
>> + if (!live)
>> + goto unlock_exit;
>> +
>>
>
> Did you try the root_count method? I think it's cleaner.
Avi, Thanks for your idea.
I have considered this method, but i'm not sure when it's the good time
to real free this page, and i think we also need a way to synchronize the
real free path and this path. Do you have any comment for it :-(
Xiao
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