RE: [Patch V2] x86, mce: Ensure offline CPU's don't participate in mce rendezvous process.

From: Luck, Tony
Date: Tue Dec 08 2015 - 11:00:09 EST


> No, the system did panic in both times. The "strange" observation is
> that the MCE gets reported only on the cores on node 0. Or at least only
> the printks from mce_panic() on the cores on node0 reach the serial
> console.

You only see messages and logs from node0, because the cpus there are
the only ones that see any errors logged in their banks.

The cpus on node 1, 2, 3 scan all banks and find nothing, so say nothing.
There are no system-wide banks ... just core-wide (in recent generations
banks 0-3) and socket-wide (banks >=4). But don't code those numbers
into any generic code ... we will change them sooner or later.

-Tony
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