Hi Rafael,
I don't know why but we are glad to find the below changes on commit
1b360f44d009059e446532f29c1a889951e72667 ("ACPI / hotplug / PCI: Fix bridge
removal race in handle_hotplug_event()")
test case: brickland2/micro/vm-scalability/300s-anon-r-rand-mt
d42f5da23400833 1b360f44d009059e446532f29
--------------- -------------------------
3.54 ~164% -80.9% 0.68 ~37% TOTAL vm-scalability.stddev
14177 ~ 7% -22.1% 11040 ~ 7% TOTAL
numa-meminfo.node0.SReclaimable
3543 ~ 7% -22.1% 2759 ~ 7% TOTAL
numa-vmstat.node0.nr_slab_reclaimable
776196 ~ 6% -10.0% 698893 ~ 5% TOTAL numa-numastat.node2.local_node
776196 ~ 6% -10.0% 698894 ~ 5% TOTAL numa-numastat.node2.numa_hit
The ~XX% numbers are stddev percent.
The [+-]XX% is change percent.
The below graph shows all samples collected during the bisect
[*] bisect-good
[O] bisect-bad ("bad" in the sense of bisect)
In which you can see the stableness of the change and bisect.
vm-scalability.stddev
16 ++--------------------------------------------------------------------+
| * |
14 ++ : |
12 ++ : |
| :: |
10 ++ :: |
| :: |
8 ++ :: |
| : : |
6 ++ * : : |
4 ++ * * :: : : |
| +: : + * : : : : |
2 ++*. *. .* : : * .*. + : : : .* : : |
|+ * + * *. .* O *.*.*. .** O.**.O.* O: *.O.* O OO.* + : *.|
0 O+O-OO-O-O-O-OO-O-O---OO-O-O-O-OO-O---OO-*-O---OO-*-O------O-O-*-*----*
Thanks,
Fengguang
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