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| author | Sinan Kaya <okaya@kernel.org> | 2018-08-02 23:09:41 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-08-03 12:19:08 +0200 |
| commit | 1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e (patch) | |
| tree | 9b2477fceaa1883b29a539f7f6d3067ea1fcac47 /kernel/watchdog_hld.c | |
| parent | b80a2bfce85e1051056d98d04ecb2d0b55cbbc1c (diff) | |
| download | lwn-1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e.tar.gz lwn-1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e.zip | |
watchdog: Reduce message verbosity
Code is emitting the following error message during boot on systems
without PMU hardware support while probing NMI capability.
NMI watchdog: Perf event create on CPU 0 failed with -2
This error is emitted as the perf subsystem returns -ENOENT due to lack of
PMUs in the system.
It is followed by the warning that NMI watchdog is disabled:
NMI watchdog: Perf NMI watchdog permanently disabled
While NMI disabled information is useful for ordinary users, seeing a PERF
event create failed with error code -2 is not.
Reduce the message severity to debug so that if debugging is still possible
in case the error code returned by perf is required for analysis.
Signed-off-by: Sinan Kaya <okaya@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Don Zickus <dzickus@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=599368
Link: https://lkml.kernel.org/r/20180803060943.2643-1-okaya@kernel.org
Diffstat (limited to 'kernel/watchdog_hld.c')
| -rw-r--r-- | kernel/watchdog_hld.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/watchdog_hld.c b/kernel/watchdog_hld.c index e449a23e9d59..1f7020d65d0a 100644 --- a/kernel/watchdog_hld.c +++ b/kernel/watchdog_hld.c @@ -175,8 +175,8 @@ static int hardlockup_detector_event_create(void) evt = perf_event_create_kernel_counter(wd_attr, cpu, NULL, watchdog_overflow_callback, NULL); if (IS_ERR(evt)) { - pr_info("Perf event create on CPU %d failed with %ld\n", cpu, - PTR_ERR(evt)); + pr_debug("Perf event create on CPU %d failed with %ld\n", cpu, + PTR_ERR(evt)); return PTR_ERR(evt); } this_cpu_write(watchdog_ev, evt); |