On 06/22/2011 02:28 PM, Avi Kivity wrote:

Actually, this is dangerous.  If we use the dirty bit for other 
things, we will get data corruption.

For example we might want to map clean host pages as writeable-clean 
in the spte on a read fault so that we don't get a page fault when 
they get eventually written.

Another example - we can use the dirty bit for dirty page loggging.

So I think we can get away with a conditional tlb flush - only flush if 
the page was dirty.  That should be rare after the first pass, at least 
with small pages.

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

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