On Tue, Jun 01, 2021 at 01:05:05PM -0700, Tony Luck wrote:

Scripts that process error logs can do better if they know whether
Linux is executing in CMCI storm mode (only polling and reporting
some errors instead of trying to report them all). While it is possible
to parse the console log for:

	CMCI storm detected: switching to poll mode
	CMCI storm subsided: switching to interrupt mode

messages, that is error prone.

Add a new file to sysfs to report the current storm count.

Reported-by: Christopher BeSerra <redacted>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

RFC questions:
1) Is there a better way to do this?

Probably.

But I'm unclear as to what this whole use case is. The very first
"Scripts that process error logs" already sounds like a bad idea - I'd
expect userspace consumers to open the trace_mce_record() and get the
MCE records from there. And in that case CMCI storm shouldn't matter...

-- 
Regards/Gruss,
    Boris.

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