Public bug reported:
5.8 HWE kernel dies with the following exception:
cannot attach kprobe, probe entry may not exist
Traceback (most recent call last):
File "/usr/sbin/biosnoop-bpfcc", line 162, in <module>
b.attach_kprobe(event="blk_account_io_completion",
File "/usr/lib/python3/dist-packages/bcc/__init__.py", line 658, in
attach_kprobe
raise Exception("Failed to attach BPF program %s to kprobe %s" %
Exception: Failed to attach BPF program b'trace_req_completion' to kprobe
b'blk_account_io_completion'
5.8 HWE kernel does not have a kprobe.blk_account_io_completion but does
have a kprobe.blk_account_io_done. Modifying allows this script to
run. Perhaps you could generate some tests to confirm that the relevant
kprobes are available?
** Affects: bpfcc (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1910581
Title:
Exception: Failed to attach BPF program b'trace_req_completion' to
kprobe b'blk_account_io_completion'
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