Hi Waiman,
[auto build test ERROR on kvm/linux-next]
[also build test ERROR on v4.10-rc8 next-20170215]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url:
It was found when running fio sequential write test with a XFS ramdisk
on a KVM guest running on a 2-socket x86-64 system, the %CPU times
as reported by perf were as follows:
69.75% 0.59% fio [k] down_write
69.15% 0.01% fio [k] call_rwsem_down_write_failed
67.12% 1.12% fio [k]
