During our testing we noticed that nmi watchdogs in sparc could not be disabled or enabled dynamically using sysctl/proc interface. Sparc uses its own arch specific nmi watchdogs. There is a sysctl and proc interface(proc/sys/kernel/nmi_watchdog) to enable/disable nmi watchdogs. However, that is not working for sparc. There is no interface to feed this parameter to arch specific nmi watchdogs.
These patches extend the same sysctl/proc interface to enable or disable these arch specific nmi watchdogs dynamically. Introduced new function update_arch_nmi_watchdog which can be implemented in arch specific handlers. If you think there is a better way to do this. Please advice. Tested on sparc. Compile tested on x86. Babu Moger (2): watchdog: Introduce update_arch_nmi_watchdog sparc: Implement update_arch_nmi_watchdog arch/sparc/kernel/nmi.c | 26 ++++++++++++++++++++++++++ include/linux/nmi.h | 1 + kernel/watchdog.c | 16 +++++++++++++--- 3 files changed, 40 insertions(+), 3 deletions(-)
