[ Please keep me in CC as I'm not subscribed to the list] Hi All, My kernel is built with the following options: $ cat /boot/config-5.0.1 | grep NO_HZ CONFIG_NO_HZ_COMMON=y CONFIG_NO_HZ_IDLE=y # CONFIG_NO_HZ_FULL is not set CONFIG_NO_HZ=y CONFIG_RCU_FAST_NO_HZ=y I booted with watchdog enabled(nmi_watchdog=1) as given below: BOOT_IMAGE=/boot/vmlinuz-5.0.1 root=UUID=f65454ae-3f1d-4b9e-b4be-74a29becbe1e ro debug ignore_loglevel console=ttyUSB0,115200 console=tty0 console=tty1 console=ttyS2,115200 memmap=1M!1023M nmi_watchdog=1 crashkernel=384M-:128M When the system is frozen or the kernel is locked up(I noticed that in this state kernel is not responding for ALT-SysRq-<command key>) but watchdog is not triggered. So I want to understand how to enable the watchdog timer and how to verify the basic watchdog functionality behavior? Any pointers on this will be greatly appreciated. -- Thanks, Sekhar
