Commit b66a2356 authored Mar 12, 2013 by anish kumar Committed by Ingo Molnar Mar 14, 2013

watchdog: Add comments to explain the watchdog_disabled variable



The watchdog_disabled flag is a bit cryptic. However it's
usefulness is multifold. Uses are:

 1. Check if smpboot_register_percpu_thread function passed.

 2. Makes sure that user enables and disables the watchdog in
    sequence i.e. enable watchdog->disable watchdog->enable watchdog
    Unlike enable watchdog->enable watchdog which is wrong.

Signed-off-by: anish kumar <anish198519851985@gmail.com>
[small text cleanups]
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: chuansheng.liu@intel.com
Cc: paulmck@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1363113848-18344-1-git-send-email-dzickus@redhat.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 877c6856

kernel/watchdog.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -517,6 +517,11 @@ int proc_dowatchdog(struct ctl_table *table, int write,
		return ret;

		set_sample_period();
		/*
		* Watchdog threads shouldn't be enabled if they are
		* disabled. The 'watchdog_disabled' variable check in
		* watchdog_*_all_cpus() function takes care of this.
		*/
		if (watchdog_enabled && watchdog_thresh)
		watchdog_enable_all_cpus();
		else