[Xen-devel] Re: [PATCH] Fix performance problems with mprotect()

["Bruce Rogers" <BROGERS@xxxxxxxxxx>]

I don't see how.  If you are seeing a problem, please elaborate.

- Bruce

>>> On 1/7/2008 at 8:18 AM, in message <p73d4sdsly4.fsf@xxxxxxxxxxxxxx>, Andi 
>>> Kleen
<andi@xxxxxxxxxxxxxx> wrote:
> "Bruce Rogers" <brogers@xxxxxxxxxx> writes:
>> +
>> +        /* Allowed to change in Accessed/Dirty flags only. */
>> +        BUG_ON((t ^ old) & ~(intpte_t)(_PAGE_ACCESSED|_PAGE_DIRTY));
> 
> 
> Are you sure that BUG_ON can't be triggered from the hypercall?
> It should error out in this case I think.
> 
> -Andi
> 
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