[Bug runtime/17270] uprobes_onthefly.exp causing hang on ppc64

[jlebon at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=17270

--- Comment #4 from Jonathan Lebon <jlebon at redhat dot com> ---
Hey David,

Glad you found the cause of the issue.

> 1) The "stap module notifier triggered in unexpected state 3" message happens
> when the session is shutting down but the uprobe hasn't been unregistered
> yet.

This can also occur if there is still a work item left on the workqueue after
we changed to the STAP_SESSION_STOPPING state. This is probably why this
error message occurs more frequently during stress subtests.

> I think we can change the code to not output this message if we in the
> STAP_SESSION_STOPPING state.

Agreed!

Jonathan

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