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authorSinan Kaya <okaya@kernel.org>2018-08-03 09:09:41 +0300
committerThomas Gleixner <tglx@linutronix.de>2018-08-03 13:19:08 +0300
commit1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e (patch)
tree9b2477fceaa1883b29a539f7f6d3067ea1fcac47 /kernel
parentb80a2bfce85e1051056d98d04ecb2d0b55cbbc1c (diff)
downloadlinux-1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e.tar.xz
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')
-rw-r--r--kernel/watchdog_hld.c4
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);