I am experiencing this issue on a new xeon scalable machine.
I can confirm that it is present with xenial linux-image-generic, and
linux-image-generic-hwe, kernels 4.4.0-116, and 4.13.0-38, and I can reproduce
it at will.
It no longer seems to occur on kernel 4.15.0-13.
In all cases,
I was having this problem on two systems, one a Core i-7, the other a
Xeon. Both are X86-64, running the kernel that uname reports as
4.4.0-66-generic
The problem has not recurred since the changes, but that's only a few
days ago at the moment.
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It looks like I'm having the same problem with a clean install of
Xubuntu 16.04.1, and I'll be trying the clocksource tweak. If you don't
hear back, it got fixed.
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** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1596866
Title:
NMI watchdog: Watchdog detected hard LOCKUP on cpu 0 - Xenial - Python
@jjo
So far I am having success with clocksource=tsc despite warnings from the
kernel telling me it is ynstable.
@jsalisbury
This is off a clean xenial install/update. I will try post test from new kernel
shortly.
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Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.7
Some ~recent alike finding, in case it helps:
https://github.com/TobleMiner/wintron7.0/issues/2
- worked around with clocksource=tsc, guess that
ntpq should also show a large drift.
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** Attachment added: "kern.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1596866/+attachment/4692019/+files/kern.log
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https://bugs.launchpad.net/bugs/1596866
Title:
NMI
Uploading kern.log too. dmesg was cleared as server needed to be
rebooted.
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https://bugs.launchpad.net/bugs/1596866
Title:
NMI watchdog: Watchdog detected hard LOCKUP on cpu 0 - Xenial
apport information
** Tags added: apport-collected uec-images
** Description changed:
I am receiving quite regular hardlockups on python (27) in xenial:
Linux rts-os-s-03 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13
UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Ubuntu 16.04 LTS
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