RE: [Xen-devel] [PATCH][VT] Patch to allowVMXdomainsto be destroyedor shut down cleanly

["Li, Chengyuan" <chengyuan.li@xxxxxxxxx>]

Keir Fraser scribbled on 2005年9月20日 17:24:

> On 20 Sep 2005, at 10:17, Li, Chengyuan wrote:
> 
>> 
>> get_page/put_page has already been handled when cr3 updates, hasn't
>> it? 
> 
> But it happens unconditionally doesn't it? What if the guest writes
> cr3 while paging is disabled, then enables paging in cr0? Won't that
> cause us to get_page() twice?

No, in cr3 handler, it only get_page/put_page when paging enabled. If paging is 
disabled, no get_page/put_page operations.

   
> 
>   -- Keir
> 
> 
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Thanks,
Chengyuan

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