m.roth@xxxxxxxxx wrote: > m.roth@xxxxxxxxx wrote: >> m.roth@xxxxxxxxx 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.... > Still more info (come on, folks, help me out!): these two machines that keep rebooting, and only one other that doesn't, have Intel E5-2630's in them. These two are v3, while the one other is a v.2. The latter's microcode is microcode: CPU0 sig=0x306e4, pf=0x1, revision=0x428 while on the two that reboot, they have microcode: CPU0 sig=0x306f2, pf=0x1, revision=0x3a Anyone think I might be going down the wrong path? Any thoughts at all? If not, any cmts on my downgrading to the previous microcode? This happened once a week ago, and then, starting last Friday, began happening at least around 04:00 every day. mark _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos