Re: [PATCH] maximum latency tracking infrastructure (version 3)

[Andi Kleen]

Arjan van de Ven <arjan@xxxxxxxxxxxxxxx> writes:
> 
> I could have sworn there was an idle call notifier already\
> 
> ah there is on x86-64 but it is architecture specific...

The original implementation was on s390. But they're not really
designed for doing anything slow, so I wouldn't recommend using
them in drivers unless it's very fast.

-Andi
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