On Sun, Jul 18, 2010 at 06:14:11PM +0300, Avi Kivity wrote:
On 07/17/2010 07:31 AM, Gleb Natapov wrote:
Well, we don't want to COW it on write faults.KSM page will be COWed by __get_user_pages_fast(addr, 1, 1, page) inCurrently pages allocated for guest memory are required to be RW, so after your seriesExcept KSM pages.
behaviour will remain exactly the same as before.
get_user_page_and_protection() just like it COWed now, no?
The optimal behaviour is:So do we or don't we want to COW on write faults?
- write faults: COW and instantiate a writeable spte