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Title
How to stop DKMS (Linux) from doing auto update the Kernel -
Description
Rapid Recovery for Linux is installed with DKMS modules to be able to automatically rebuild kernel modules when a new kernel is installed. On rare occasions, this may cause CPU and memory high usage. -
Cause
DKMS will update the new kernel modules automatically. This may cause CPU and memory high usage that could lead the system to go into hung state and must be manually rebooted to resume normal operation.
Example of DKMS running autoinstall cause the system to hang.
Jun 30 10:58:30 xxx logger: DKMS: Running auto installation for kernel 2.6.32-642.el6.x86_64Jun 30 10:58:31 xxx logger: Done.Jun 30 10:58:31xxx logger: Starting DKMS-watchdog service for kernel-headers ...Jun 30 10:58:31 xxx logger: DKMS: Starting Watchdog-watch_src serviceJun 30 10:58:31 xxx logger: DKMS: Watchdog-watch_src service started with PID (10891)Jun 30 10:58:31 xxx logger: DKMS: Started monitoring folder: /usr/src/kernelsJun 30 10:58:31 xxx logger: Folder contains following packages: kernel-devel-2.6.32-642.el6.x86_64Jun 30 10:58:32 xxx logger: DKMS: Watchdog-watch_src service was stopped: trying to restartJun 30 10:58:32 xxx logger: DKMS: Watchdog-watch_src service started with PID (10931)Jun 30 10:58:32 xxx logger: DKMS: Started monitoring folder: /usr/src/kernels
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Resolution
The DKMS services can be stopped for this purpose so that the production systems can be operational until a maintenance window is available to update Kernel modules.
Redhat and CentOS:
Steps for RHEL/CentOS 71. systemctl stop dkms-service2. systemctl disable dkms-serviceSteps for RHEL/CentOS 61. service dkms-service stop2. chkconfig dkms-service off