Re: [PATCH V5 1/2] mm: compaction: move compaction sysctl to its own file

ye xingchen
2023-03-24T06:24:18Z

>$ ./scripts/bloat-o-meter vmlinux.old vmlinux
>add/remove: 1/0 grow/shrink: 1/2 up/down: 346/-350 (-4)
>Function old new delta
>vm_compaction - 320 +320
>kcompactd_init 167 193 +26
>proc_dointvec_minmax_warn_RT_change 104 10 -94
>vm_table 2112 1856 -256
>Total: Before=19287558, After=19287554, chg -0.00%
>
>So I don't think we need to pause this move or others where are have savings.
>
>Minghao, can you fix the commit log, and explain how you are also saving
>4 bytes as per the above bloat-o-meter results?

$ ./scripts/bloat-o-meter vmlinux vmlinux.new
add/remove: 1/0 grow/shrink: 1/1 up/down: 350/-256 (94)
Function old new delta
vm_compaction - 320 +320
kcompactd_init 180 210 +30
vm_table 2112 1856 -256
Total: Before=21104198, After=21104292, chg +0.00%

In my environment, kcompactd_init increases by 30 instead of 26.
And proc_dointvec_minmax_warn_RT_change No expansion.

minghao