and, more importantly, how can I adjust this threshold for Ubuntu 14.04 server installations?

I have standard Ubuntu 14.04 server VMs crashing due to CPU softlocks and VMWare recommends adjusting this threshold.

up vote 1 down vote accepted

With new(er) kernel, you tune /proc/sys/kernel/watchdog_thresh instead. (Older kernels use /proc/sys/kernel/softlockup_thresh, I think).

I add the following line to end of /etc/sysctl.conf to have it applied at boot:


where nn is a number 0 or higher.

Your Answer


By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.