On 10/11/2012 02:44 PM, Mel Gorman wrote:
On Thu, Oct 04, 2012 at 01:51:05AM +0200, Andrea Arcangeli wrote:
When pages are collapsed try to keep the last_nid information from one
of the original pages.
If two pages within a THP disagree on the node, should the collapsing be
aborted? I would expect that the code of a remote access exceeds the
gain from reduced TLB overhead.
Hard to predict. The gains from THP seem to be on the same
order as the gains from NUMA locality, both between 5-15%
typically.
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