[PATCH 0/3] Handle zone statistics distinctively based-on

[Kemi Wang <kemi.wang@intel.com>]

Each page allocation updates a set of per-zone statistics with a call to
zone_statistics(). As discussed in 2017 MM summit.
A link to the MM summit slides:
http://people.netfilter.org/hawk/presentations/MM-summit2017/MM-summit2017
-JesperBrouer.pdf

This is the second step for optimizing zone statistics, the first patch
introduces a tunable interface that allow VM statistics configurable(see
the first patch for details):
if vmstat_mode = auto, automatic detection of VM statistics
if vmstat_mode = strict, keep all the VM statistics
if vmstat_mode = coarse, ignore unimportant VM statistics
As suggested by Dave Hansen and Ying Huang.

With this interface, the second patch handles numa counters distinctively
according to different vmstat mode, and the test result shows about 4.8%
(185->176) drop of cpu cycles with single thread and 8.1% (343->315) drop
of of cpu cycles with 88 threads for single page allocation.

The third patch updates ABI document accordingly.

Kemi Wang (3):
  mm, sysctl: make VM stats configurable
  mm: Handle numa statistics distinctively based-on different VM stats
    modes
  sysctl/vm.txt: Update document

 Documentation/sysctl/vm.txt |  26 ++++++++++
 drivers/base/node.c         |   2 +
 include/linux/vmstat.h      |  20 +++++++
 kernel/sysctl.c             |   7 +++
 mm/page_alloc.c             |  13 +++++
 mm/vmstat.c                 | 124 ++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 192 insertions(+)

-- 
2.7.4

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