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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-09-12 21:37:21 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-14 11:41:08 +0200 |
| commit | 146c9d0e9dfdb62ed6afd43cc263efafbbfd1dcf (patch) | |
| tree | 6fdf1af693979b68fdc9f610d73aaf769080af05 /kernel/watchdog.c | |
| parent | 2a1b8ee4f5665b4291e43e4a25d964c3eb2f4c32 (diff) | |
| download | lwn-146c9d0e9dfdb62ed6afd43cc263efafbbfd1dcf.tar.gz lwn-146c9d0e9dfdb62ed6afd43cc263efafbbfd1dcf.zip | |
watchdog/hardlockup/perf: Use new perf CPU enable mechanism
Get rid of the hodgepodge which tries to be smart about perf being
unavailable and error printout rate limiting.
That's all not required simply because this is never invoked when the perf
NMI watchdog is not functional.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Don Zickus <dzickus@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Ulrich Obergfell <uobergfe@redhat.com>
Link: http://lkml.kernel.org/r/20170912194148.259651788@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/watchdog.c')
| -rw-r--r-- | kernel/watchdog.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c index fd8a998eb197..5eb11960e4a2 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -107,6 +107,7 @@ __setup("hardlockup_all_cpu_backtrace=", hardlockup_all_cpu_backtrace_setup); */ int __weak watchdog_nmi_enable(unsigned int cpu) { + hardlockup_detector_perf_enable(); return 0; } @@ -465,7 +466,8 @@ static void watchdog_enable(unsigned int cpu) /* Initialize timestamp */ __touch_watchdog(); /* Enable the perf event */ - watchdog_nmi_enable(cpu); + if (watchdog_enabled & NMI_WATCHDOG_ENABLED) + watchdog_nmi_enable(cpu); watchdog_set_prio(SCHED_FIFO, MAX_RT_PRIO - 1); } |