On Mon, Nov 26, 2018 at 10:24 PM kernel test robot
<rong.a.c...@intel.com> wrote:
>
> FYI, we noticed a -61.3% regression of vm-scalability.throughput due
> to commit ac5b2c18911f ("mm: thp: relax __GFP_THISNODE for
> MADV_HUGEPAGE mappings")
Well, that's certainly noticeable and not good.
Andrea, I suspect it might be causing fights with auto numa migration..
Lots more system time, but also look at this:
> 1122389 ± 9% +17.2% 1315380 ± 4% proc-vmstat.numa_hit
> 214722 ± 5% +21.6% 261076 ± 3%
> proc-vmstat.numa_huge_pte_updates
> 1108142 ± 9% +17.4% 1300857 ± 4% proc-vmstat.numa_local
> 145368 ± 48% +63.1% 237050 ± 17% proc-vmstat.numa_miss
> 159615 ± 44% +57.6% 251573 ± 16% proc-vmstat.numa_other
> 185.50 ± 81% +8278.6% 15542 ± 40% proc-vmstat.numa_pages_migrated
Should the commit be reverted? Or perhaps at least modified?
Linus
