On 5/19/20 1:55 AM, Song Liu wrote:
2. try use bcc/bpftrace to trace r5l_recovery_read_page(),
specifically, the 4th argument.
With bcc, it is something like:
trace.py -M 100 'r5l_recovery_read_page() "%llx", arg4'
-M above limits the number of outputs to 100 lines. We may need to
increase the limit or
remove the constraint. If the system doesn't have bcc/bpftrace. You
can also try with
kprobe.
Trace keeps outputting the following data (with steadily growing 4th
argument):
PID TID COMM FUNC -
3456 3456 mdadm r5l_recovery_read_page 98f65b8
3456 3456 mdadm r5l_recovery_read_page 98f65c0
3456 3456 mdadm r5l_recovery_read_page 98f65c8
3456 3456 mdadm r5l_recovery_read_page 98f65d0
3456 3456 mdadm r5l_recovery_read_page 98f65d8
3456 3456 mdadm r5l_recovery_read_page 98f65e0
3456 3456 mdadm r5l_recovery_read_page 98f65e8
3456 3456 mdadm r5l_recovery_read_page 98f65f0
3456 3456 mdadm r5l_recovery_read_page 98f65f8
3456 3456 mdadm r5l_recovery_read_page 98f6600
3456 3456 mdadm r5l_recovery_read_page 98f65c0
3456 3456 mdadm r5l_recovery_read_page 98f65c8
3456 3456 mdadm r5l_recovery_read_page 98f65d0
3456 3456 mdadm r5l_recovery_read_page 98f65d8
3456 3456 mdadm r5l_recovery_read_page 98f65e0
3456 3456 mdadm r5l_recovery_read_page 98f65e8
3456 3456 mdadm r5l_recovery_read_page 98f65f0
3456 3456 mdadm r5l_recovery_read_page 98f65f8
3456 3456 mdadm r5l_recovery_read_page 98f6600
3456 3456 mdadm r5l_recovery_read_page 98f6608
3456 3456 mdadm r5l_recovery_read_page 98f6610
... a few minutes later ...
PID TID COMM FUNC -
3456 3456 mdadm r5l_recovery_read_page 9b69b60
3456 3456 mdadm r5l_recovery_read_page 9b69b68
3456 3456 mdadm r5l_recovery_read_page 9b69b70
3456 3456 mdadm r5l_recovery_read_page 9b69b78
3456 3456 mdadm r5l_recovery_read_page 9b69b80
3456 3456 mdadm r5l_recovery_read_page 9b69b88
3456 3456 mdadm r5l_recovery_read_page 9b69b90
3456 3456 mdadm r5l_recovery_read_page 9b69b98
3456 3456 mdadm r5l_recovery_read_page 9b69ba0
3456 3456 mdadm r5l_recovery_read_page 9b69ba8
3456 3456 mdadm r5l_recovery_read_page 9b69bb0
3456 3456 mdadm r5l_recovery_read_page 9b69bb8
3456 3456 mdadm r5l_recovery_read_page 9b69bc0
3456 3456 mdadm r5l_recovery_read_page 9b69bc8
3456 3456 mdadm r5l_recovery_read_page 9b69b90
3456 3456 mdadm r5l_recovery_read_page 9b69b98
3456 3456 mdadm r5l_recovery_read_page 9b69ba0
3456 3456 mdadm r5l_recovery_read_page 9b69ba8
3456 3456 mdadm r5l_recovery_read_page 9b69bb0
3456 3456 mdadm r5l_recovery_read_page 9b69bb8
... and so on
