--- Dave Hansen <haveblue@us.ibm.com> wrote:

On Wed, 2004-02-04 at 10:54, Alok Mooley wrote:

quoted

--- Dave Hansen <haveblue@us.ibm.com> wrote:

Depending on the quantity of work that you're trying
to do at once, this
might be unavoidable.  

I know it's a difficult thing to think about, but I
still don't
understand the precise cases that you're concerned
about.  Page faults
to me seem like the least of your problems.  A
bigger issue would be if
the page is written to by userspace after you copy,
but before you
install the new pte.  Did I miss the code in your
patch that invalidated
the old tlb entries?

This is a non issue for us right now, since we update
the ptes in a lock, & so no one can access it before
it is completely updated. Yes, we invalidate the old
tlb entries as well as the cache entries as reqd. on
some other architectures.

-Alok


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