Re: [xfs] 6191cf3ad5: stress-ng.rename.ops_per_sec -73.5% regression

[Yin Fengwei]

Hi,

On 2022/1/31 23:49, kernel test robot wrote:
>        0.00           +59.8       59.78        perf-profile.calltrace.cycles-pp.osq_lock.__mutex_lock.flush_workqueue.xfs_fs_statfs.statfs_by_dentry
>       23.44 ±  2%     +61.0       84.49        perf-profile.calltrace.cycles-pp.vfs_statfs.user_statfs.__do_sys_statfs.do_syscall_64.entry_SYSCALL_64_after_hwframe
>       23.40 ±  2%     +61.1       84.47        perf-profile.calltrace.cycles-pp.statfs_by_dentry.vfs_statfs.user_statfs.__do_sys_statfs.do_syscall_64

We did further check of the perf data. From above three lines,
the patch brought higher lock content (+59.8) in this extreme cases.

Regarding the patch could fix race issue, we will not tracking this
report. Let us know if you have any comments. Thanks.


Regards
Yin, Fengwei