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67d34a1
(Get the code!)
@Todd
are you sure they are not swappable?
according to lwn they are:
http://
"""
This scheme will increase the use of huge pages transparently, but it does not yet solve the whole problem. Huge pages must be swappable, lest the system run out of memory in a hurry. Rather than complicate the swapping code with an understanding of huge pages, Andrea simply splits a huge page back into its component small pages if that page needs to be reclaimed. Many other operations (mprotect(), mlock(), ...) will also result in the splitting of a page.
"""
also the performance regression might be fixed in 3.11;
http://
mm: fix aio performance regression for database caused by THP