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SubjectRe: kprobe: __blkdev_put probe is missed
On Fri, 19 Jun 2020 15:28:59 +0800
Ming Lei <ming.lei@redhat.com> wrote:

> >
> > OK, then let's make events (for sure)
> >
> > root@devnote2:/sys/kernel/debug/tracing# echo p __blkdev_put >> kprobe_events
> > root@devnote2:/sys/kernel/debug/tracing# echo r __blkdev_put >> kprobe_events
> > root@devnote2:/sys/kernel/debug/tracing# echo p blkdev_put >> kprobe_events

Hi Ming,

Do you have the kprobe_events file?

> > root@devnote2:/sys/kernel/debug/tracing# echo 1 > events/kprobes/enable
>
> I can't find 'events/kprobes' in my VM with upstream kernel, also not found
> the dir under fedora31(5.5.15-200) & rhel8(v4.18 based).

The events/kprobes directly will be created when you create a
kprobe_event. It wont exist until then.

-- Steve

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