[RFC PATCH 0/4] Automatic NUMA balancing and PROT_NONE handling followup v2r8

Mel Gorman
2015-03-07T15:21:01Z

Dave Chinner reported a problem due to excessive NUMA balancing activity
and bisected it. The first patch in this series corrects a major problem
that is unlikely to affect Dave but is still serious. Patch 2 is a minor
cleanup that was spotted while looking at scan rate control. Patch 3 is
minor and unlikely to make a difference but is still an inconsistentcy
between base and THP handling. Patch 4 is the important one, it slows
PTE scan updates if migrations are failing or throttled. Details of the
performance impact on local tests is included in the patch.

include/linux/migrate.h | 5 -----
include/linux/sched.h | 9 +++++----
kernel/sched/fair.c | 8 ++++++--
mm/huge_memory.c | 8 +++++---
mm/memory.c | 3 ++-
mm/migrate.c | 20 --------------------
6 files changed, 18 insertions(+), 35 deletions(-)

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2.1.2