[CentOS] C 7: smpboot: CPU 16 is now offline, and slabs...

[m.roth at 5-cent.us]

m.roth at 5-cent.us wrote:
> m.roth at 5-cent.us wrote:
>> Current kernel, and I just booted, and dmesg shows, of the 32 cores, 0,
>> 2, 4 and 6 ok, and *all* other show "is now offline.
>>
>> What's happening here?
<snip>
Ok, more info. I found how to online a CPU -
echo 1 > /sys/devices/system/cpu/cpu23/online

Perhaps I should have started with 1,3, etc, but I was doing the 20's,
instead. Got to CPU27... and the system rebooted.

Now I'm wondering if the offline'd CPUs have something to do with the fact
that this (and an identical one, in the datacenter, are rebooting around
04:00 every day. Btw, they're Dell PE R530's from 2016....

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