Re: [Xen-devel] [PATCH RFC v2 1/4] x86/mm: Shadow and p2m changes for PV mem_access

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 30.07.14 at 20:35, <aravindp@xxxxxxxxx> wrote:
>>Still rather ugly, and still leaving the window in time as big as the CR0.CD
>>variant (the window in space got shrunk to just a page).
>>Furthermore, how would you guarantee no other vCPU of the same guest
>>modifies the now writable page in the meantime?
> 
> Good point. The only other thing I can think of to get around this issue is 
> to pause the domain during these writes and unpause it on the way out of the 
> guest access functions.

If that's tolerable guest-performance-wise...

Jan


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