sched, numa, mm: Add NUMA_MIGRATION feature flag
After this patch, doing:
# echo NO_NUMA_MIGRATION > /sys/kernel/debug/sched_features
Will turn off the NUMA placement logic/policy - but keeps the
working set sampling faults in place.
This allows the debugging of the WSS facility, by using it
but keeping vanilla, non-NUMA CPU and memory placement
policies.
Default enabled. Generates on extra code on !CONFIG_SCHED_DEBUG.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Link: http://lkml.kernel.org/n/tip-xjt7bqjlphxRfjXxasqm4cdv@git.kernel.org