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Date:   Mon, 22 Apr 2019 15:59:16 +0000
From:   "Luck, Tony" <>
To:     Borislav Petkov <>
CC:     Cong Wang <>,
        LKML <>
Subject: RE: [PATCH] RAS/CEC: Add debugfs switch to disable at run time

> 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.


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