[LKP] 2d32f12eef: vm-scalability.median -3.5% regression

Dan Williams dan.j.williams at intel.com
Mon Mar 4 11:05:15 PST 2019


On Mon, Mar 4, 2019 at 5:05 AM kernel test robot <rong.a.chen at intel.com> wrote:
>
> Greeting,
>
> FYI, we noticed a -3.5% regression of vm-scalability.median due to commit:
>
>
> commit: 2d32f12eefe7965cfab08a68fd793e7d96522462 ("[-mm only] mm/shuffle: Default enable all shuffling")
> git://internal_merge_and_test_tree devel-catchup-201902220840

The randomization effectively ages the state of the free lists. Is
there any insight as to whether this result would reproduce on a
typical system that has been running long enough for the free lists to
be similarly scrambled?


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