* Mike Travis <mike.tra...@hpe.com> wrote:
> Add a new NMI call chain that is called last after all other NMI handlers
> have been checked and did not "handle" the NMI. This mimics the current
> NMI_UNKNOWN call chain except it eliminates the WARNING message about
> multiple NMI handlers registering on this call chain.
>
> This call chain dramatically lowers the NMI call frequency when high
> frequency NMI tools are in use, notably the perf tools. It is required
> for NMI handlers that cannot sustain a high NMI call rate without
> ramifications to the system operability.
So how about we just turn off that warning instead? I don't remember the last
time
it actually _helped_ us find any kernel or hardware bug - and it has caused
tons
of problems...
It's not like we warn about excess regular IRQs either - we either handle them
or
at most increase a counter somewhere. We could do the same for NMIs: introduce
a
counter somewhere that counts the number of seemingly unhandled NMIs.
But in any case, we should not spam the kernel log, neither with high, nor with
low frequency.
Thanks,
Ingo
