FYI, we noticed the below changes on

commit aabfb57296e3dd9761e47736ec69305c95461d7d ("mm: memcontrol: do not kill uncharge batching in free_pages_and_swap_cache")


01c2965f0723a252  aabfb57296e3dd9761e47736ec  testbox/testcase/testparams
----------------  --------------------------  ---------------------------
         %stddev     %change         %stddev
             \          |                \
      2017 ±  3%     -14.0%       1735 ±  2%  lkp-hsw01/vm-scalability/performance-300s-16G-shm-pread-rand
      2017           -14.0%       1735        GEO-MEAN time.system_time

01c2965f0723a252  aabfb57296e3dd9761e47736ec
----------------  --------------------------
       332 ±  0%      -1.3%        328 ±  0%  lkp-hsw01/vm-scalability/performance-300s-16G-shm-pread-rand
       332            -1.3%        328        GEO-MEAN time.elapsed_time



                                 time.elapsed_time

  334 ++--------------------------------------------------------------------+
      *.    .*.. .*.*.. .*..*.*..*.*.*..*.                                  |
  333 ++*..*    *      *                  *..*.*.*..*.    .*..   .*..*      |
      |                                               *..*    *.*     +  .* |
  332 ++                                                               *.   |
      |                                                                     |
  331 ++                                                                    |
      |                                                                     |
  330 ++                                                                    |
      |                                                                     |
  329 ++                                                                    |
      |    O O  O O              O O O       O   O         O      O  O      |
  328 O+            O  O O  O O         O           O O  O      O      O  O O
      | O                                 O    O              O             |
  327 ++--------------------------------------------------------------------+


  
	[*] bisect-good sample
	[O] bisect-bad  sample

To reproduce:

	apt-get install ruby ruby-oj
	git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
	cd lkp-tests
	bin/setup-local job.yaml # the job file attached in this email
	bin/run-local   job.yaml


Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.


Thanks,
Fengguang