wangchdo commented on code in PR #17308:
URL: https://github.com/apache/nuttx/pull/17308#discussion_r2516201404
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sched/wdog/wd_start.c:
##########
@@ -313,6 +313,32 @@ int wd_start_abstick(FAR struct wdog_s *wdog, clock_t
ticks,
reassess |= wd_insert(wdog, ticks, wdentry, arg);
+ /* If the new watchdog expiration time is earlier than the current system
+ * time, trigger a timer interrupt manually. This ensures that the system
+ * processes the watchdog immediately instead of waiting for the next tick.
+ */
+
+ if (clock_compare(wdog->expired, clock_systime_ticks()))
+ {
+# ifdef CONFIG_ARCH_HAVE_IRQTRIGGER
+ if (up_timer_trigger() != OK)
Review Comment:
This new api is to trigger irq instantly, it is very fast(just set irq
request using sofware), has no delay, no need to consider what is the minimum
timeout. While up_alarm_start is time-consuming and it is not easy to consider
what is the minimum timeout, and if the timeout is too small maybe the timeout
is again earlier than the current time.
Since the wddog expiration is earlier than current time, it should be
processed right away, so trigger timer irq instantly may be better using this
up_timer_trigger.
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