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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-07-26 20:30:54 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-08-01 20:51:20 +0200 |
| commit | d2ab4cf4943576fb060b8a69341d9e0c2a952ba7 (patch) | |
| tree | d3b61f7a0313b00bed39899688ad3d5ccf9690c8 /kernel | |
| parent | 30f9028b6c43fd17c006550594ea3dbb87afbf80 (diff) | |
| download | linux-d2ab4cf4943576fb060b8a69341d9e0c2a952ba7.tar.bz2 | |
watchdog: Mark watchdog_hrtimer to expire in hard interrupt context
The watchdog hrtimer must expire in hard interrupt context even on
PREEMPT_RT=y kernels as otherwise the hard/softlockup detection logic would
not work.
No functional change.
[ tglx: Split out from larger combo patch. Added changelog ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190726185753.262895510@linutronix.de
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/watchdog.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 7f9e7b9306fe..f41334ef0971 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -490,10 +490,10 @@ static void watchdog_enable(unsigned int cpu) * Start the timer first to prevent the NMI watchdog triggering * before the timer has a chance to fire. */ - hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_HARD); hrtimer->function = watchdog_timer_fn; hrtimer_start(hrtimer, ns_to_ktime(sample_period), - HRTIMER_MODE_REL_PINNED); + HRTIMER_MODE_REL_PINNED_HARD); /* Initialize timestamp */ __touch_watchdog(); |