The patch titled
Subject: watchdog: use park/unpark functions in update_watchdog_all_cpus()
has been removed from the -mm tree. Its filename was
watchdog-use-park-unpark-functions-in-update_watchdog_all_cpus.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
Subject: watchdog: use park/unpark functions in update_watchdog_all_cpus()
Remove update_watchdog() and restart_watchdog_hrtimer() since these
functions are no longer needed. Changes of parameters such as the sample
period are honored at the time when the watchdog threads are being
unparked.
Signed-off-by: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
Reviewed-by: Aaron Tomlin <atomlin@xxxxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Cc: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/watchdog.c | 40 ++--------------------------------------
1 file changed, 2 insertions(+), 38 deletions(-)
diff -puN kernel/watchdog.c~watchdog-use-park-unpark-functions-in-update_watchdog_all_cpus kernel/watchdog.c
--- a/kernel/watchdog.c~watchdog-use-park-unpark-functions-in-update_watchdog_all_cpus
+++ a/kernel/watchdog.c
@@ -745,46 +745,10 @@ void watchdog_resume(void)
mutex_unlock(&watchdog_proc_mutex);
}
-static void restart_watchdog_hrtimer(void *info)
-{
- struct hrtimer *hrtimer = raw_cpu_ptr(&watchdog_hrtimer);
- int ret;
-
- /*
- * No need to cancel and restart hrtimer if it is currently executing
- * because it will reprogram itself with the new period now.
- * We should never see it unqueued here because we are running per-cpu
- * with interrupts disabled.
- */
- ret = hrtimer_try_to_cancel(hrtimer);
- if (ret == 1)
- hrtimer_start(hrtimer, ns_to_ktime(sample_period),
- HRTIMER_MODE_REL_PINNED);
-}
-
-static void update_watchdog(int cpu)
-{
- /*
- * Make sure that perf event counter will adopt to a new
- * sampling period. Updating the sampling period directly would
- * be much nicer but we do not have an API for that now so
- * let's use a big hammer.
- * Hrtimer will adopt the new period on the next tick but this
- * might be late already so we have to restart the timer as well.
- */
- watchdog_nmi_disable(cpu);
- smp_call_function_single(cpu, restart_watchdog_hrtimer, NULL, 1);
- watchdog_nmi_enable(cpu);
-}
-
static void update_watchdog_all_cpus(void)
{
- int cpu;
-
- get_online_cpus();
- for_each_watchdog_cpu(cpu)
- update_watchdog(cpu);
- put_online_cpus();
+ watchdog_park_threads();
+ watchdog_unpark_threads();
}
static int watchdog_enable_all_cpus(void)
_
Patches currently in -mm which might be from uobergfe@xxxxxxxxxx are
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