tree cb86550d7e440e7dfbe22b0af6d2cfc991cb76cf
parent cafb20c1f9976a70d633bb1e1c8c24eab00e4e80
author Nick Piggin <nickpiggin@yahoo.com.au> 1119736639 -0700
committer Linus Torvalds <torvalds@ppc970.osdl.org> 1119741882 -0700

[PATCH] sched: balance on fork

Reimplement the balance on exec balancing to be sched-domains aware.  Use this
to also do balance on fork balancing.  Make x86_64 do balance on fork over the
NUMA domain.

The problem that the non sched domains aware blancing became apparent on dual
core, multi socket opterons.  What we want is for the new tasks to be sent to
a different socket, but more often than not, we would first load up our
sibling core, or fill two cores of a single remote socket before selecting a
new one.

This gives large improvements to STREAM on such systems.

Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>