On 07/22/2014 05:46 AM, Xiao Guangrong wrote:
>> + if (is_pinned_spte(*sptep)) {
>> + /* don't nuke pinned sptes if page aging: return
>> + * young=yes instead.
>> + */
>> + if (age)
>> + return 1;
>> + mmu_reload_pinned_vcpus(kvm);
>> + }
>> drop_spte(kvm, step);
>
> This has a window between zapping spte and re-pin spte, so guest will fail
> at this time.
I got it, mmu_reload_pinned_vcpus will kick all vcpus out of guest and
pin the pages again... so it is ok. :)
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