On 07/01/2010 11:18 AM, Alexander Graf wrote:

How does dirty bitmap flushing work on x86 atm? I loop through all mapped pages and flush the ones that match the range of the region I need to flush. But wouldn't it be a lot more efficient to have an hlist in the memslot and loop through that when I need to flush that memslot?
   

x86 loops through the reverse-map link list rooted at the memory slot.  
The linked list links all sptes for a single hva.

So, it's like you describe, except it's an array of lists instead of a 
single list.  We need per-page rmap lists to be able to remove a page's 
sptes in response to an mmu notifier callback, and to be able to write 
protect a guest page if it's used as a page table.

-- 
error compiling committee.c: too many arguments to function