Re: [PATCH 2/2] x86/mce: Add mce=panic_on_ce_count to panic on a corrected error flood

[Breno Leitao <leitao@debian.org>]

On Mon, Aug 24, 2026 at 01:20:20PM -0700, Luck, Tony wrote:
> > > One question while I am here: is the approach itself something you are
> > > willing to take, or, just a just send patch [1/2]?
> > 
> > Boris is the maintainer here. So he has the final decision. My
> > opinion is that this is a bit niche for the kernel. Maybe this
> > could be handled by some user agent (mcelog? rasdaemon?) to
> > raise awareness to system operators about high rates of corrected
> > errors.
> 
> I chatted with someone internally. They'd be very interested in being
> able to see these running counts via some /sys files.
> 
> Perhaps your use case would be better for that too? Rather than:
> 
> "Everything is fine"

Sounds good, I will restructure v2 that way: export the running counts
first, and add the panic on top as a separate patch.

The count is already kept per CPU and per bank in struct storm_bank, so
the natural fit is one read-only file per bank, next to the existing
bank<N> knobs:

      /sys/devices/system/machinecheck/machinecheckX/ce_count<N>

Is this the right approach?

Thanks
--breno