C 7: smpboot: CPU 16 is now offline

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?



Re: C 7: smpboot: CPU 16 is now offline, and slabs...

By m.roth at 06/13/2018 - 10:00

<a href=""></a> wrote:
In googling, I see threads about incorrect calculation of slabs. Following
one thread, I find
cat /sys/kernel/slab/:t-0000048/cpu_slabs

gives me

4 N0=4

Meanwhile, slabtop shows
Active / Total Slabs (% used) : 25927 / 25927 (100.0%)

Which changes, but just varying around that number, and st 100%.

So: should I increase the number of slabs, using the kernel parm of
swiotlb, and if so, for what I show above, should I set it to, say, 32000?