On Fri, Apr 24, 2015 at 03:04:27PM -0400, Waiman Long wrote:
We'll cross that bridge when we come to it. I suspect there is more roomI don't think we need that now. However, we may have to considerWithin a NUMA node, however, we can split theI considered it but discarded the idea. It'd be more complex to setup and
memory initialization to 2 or more local CPUs if the memory size is
the two CPUs could simply end up contending on the same memory bus as
well as contending on zone->lock.
this when one day even a single node can have TBs of memory unless
we move to a page size larger than 4k.
for improvement in the initialisation that would be worth trying before
resorting to more threads. With more threads there is a risk that we hit
memory bus contention and a high risk that it actually is worse due to
contending on zone->lock when freeing the pages.
In the meantime, do you mind updating the before/after figures for your
test machine with this series please?