[CentOS] BUG: soft lockup - CPU#0 stuck for 36s! [swapper/0:0]

Tue Apr 24 21:33:47 UTC 2018
Stephen John Smoogen <smooge at gmail.com>

On 24 April 2018 at 17:16,  <m.roth at 5-cent.us> wrote:
> Adam Tauno Williams wrote:
>> On Mon, 2017-08-07 at 15:26 +0000, KM wrote:
>>> All,This happens on all of our CentOS 7 VMs.  but as stated in the
>>> email trail, the file softlockup_thresh does not exist.  Should it be
>>> added?  What is the best way to get rid of this behavior.
>>> Thanks in advance and sorry if I missed something along the way.KM
>> Yes, I see this behavior as well.  Never have found a solution - other
>> than increasing the threshold and pretending it doesn't happen.
> We see it a fair bit, and this is on server running on bare metal, not VMs.

On bare metal is usually means some hardware has gone into an
uninteruptable IRQ and the CPU is waiting for it to go away. I saw
this with systems with Green disk drives a while ago. Something going
to talk to the drive would just sit for long times while the drive
spun up, the cache was validated etc. Other things would be drives on
USB disks too when some other USB item started needing input.. since
it is a hub environment they can spew for a while and the CPU would
report a soft-lockup.

>       mark
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos

Stephen J Smoogen.