I would also update the subject to something like:

    hung_task: Panic when there are more than N hung tasks at the same
time

Ok, I will update 

That said, I think that both approaches make sense.

Your approach would trigger the panic when many processes are stuck.
Note that it still might be a transient state. But I agree that the more stuck
processes exist the more serious the problem likely is for the heath of the
system.

My approach would trigger panic when a single process hangs for a long
time. It will trigger more likely only when the problem is persistent. The
seriousness depends on which particular process get stuck.

Yes, both are reasonable requirement, and I will leave it to you or anyone else interested to implement it

Thanks

-Li.

I am fine with your approach. Just please, make more clear that the number
means the number of hung tasks at the same time.
And mention the problems to login, ...

Best Regards,
Petr