In XOS 9.6.8+, XOS 9.7.3+, and XOS 10.0.0+, XOS can detect a prolonged CPU soft lockup condition and trigger an automatic restart of the APM,
From the Release Notes: ID 102504 - Enhanced XOS to detect a prolonged CPU soft lockup condition, and automatically cause the APM to restart, (activating the XOS redundancy features) when the lockup condition is recognized (Red Hat ID 445422).
To disable this functionality, do one of the following:
- Run "echo 0 > /proc/sys/kernel/softlockup_panic" This change does not survive a VAP member reboot.
- Change sysctl.conf (kernel.softlockup_panic = 0) on the VAP member to make the change permanent.