Re: [Xen-devel] page table walk in xen_{create, destroy}_contiguous_region

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

>> Is there a particular reason why these functions need to walk the page 
>> table rather than doing a much cheaper p2m
>> translation? vstart is assumed to be in the direct mapping area anyway 
>> (otherwise the uses of __pa() in the same
>> functions wouldn't be valid).
>>
>> Thanks, Jan
>
>Looks like the walks are not really needed.

Subject: Replace page table walks by simple address calculation
Signed-off-by: jbeulich@xxxxxxxxxx 

Makes the code both smaller and faster.

Attachment: xenlinux-ccr-dcr-no-pgtable-walk.patch
Description: Text document

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