RE: [PATCH] RAS/CEC: Add debugfs switch to disable at run time

From: Luck, Tony
Date: Mon Apr 22 2019 - 11:59:20 EST

> Err, this all sounds to me like the storm detection code should
> *automatically* disable the CEC in such cases, I'd say.

Sounds good. But we should distinguish storms that have many different
addresses from storms that just ping a few addresses. CEC will see counts
hit the threshold in the latter case, but it might not be able to take the pages
offline (because they are locked, or in-use by kernel).

So I think the change might be to the return value from NOTIFY_STOP to NOTIFY_DONE
... but only if we are in the middle of a storm AND the CEC array is full.