On Wed, Apr 23, 2008 at 11:27:21AM -0700, Christoph Lameter wrote:
> There is a potential issue in move_ptes where you call 
> invalidate_range_end after dropping i_mmap_sem whereas my patches did the 
> opposite. Mmap_sem saves you there?

Yes, there's really no risk of races in this area after introducing
mm_lock, any place that mangles over ptes and doesn't hold any of the
three locks is buggy anyway. I appreciate the audit work (I also did
it and couldn't find bugs but the more eyes the better).

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