Re: [PATCH 08/13] KVM: MMU: fask check whether page is writable

Xiao Guangrong
2012-04-13T10:27:35Z

On 04/13/2012 07:08 AM, Marcelo Tosatti wrote:

>> Yes, it is used as a cache for mmu_need_write_protect.
>>
>> When the gfn is protected by sync sp or read-only host page we set this bit,
>> and it is be cleared when the sp become unsync or host page becomes writable.
>
> Wouldnt dropping support for shadow entirely make it much simpler?
>
> The idea to handle RO->RW without mmu_lock is very neat, but the
> complexity with shadow is horrible.
>

I have posted the v2 that is fairly simple, please review that one. :)
Thank you, Marcelo!