On 12/17/2013 02:45 AM, Dave Hansen wrote:
I'll do some testing and see if I can coax out any delta from the
optimization myself. Christoph went to a lot of trouble to put this
together, so I assumed that he had a really good reason, although the
changelogs don't really mention any.
IIRC it's commit 8a5ec0b ("Lockless (and preemptless) fastpaths for
slub") that documents the performance gains.
The page alignment patches came later once we discovered that we broke
the world...
Pekka
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