From 1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e Mon Sep 17 00:00:00 2001 From: Sinan Kaya Date: Thu, 2 Aug 2018 23:09:41 -0700 Subject: [PATCH] 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 Signed-off-by: Thomas Gleixner Acked-by: Don Zickus Cc: Kate Stewart Cc: Greg Kroah-Hartman Cc: Colin Ian King Cc: Peter Zijlstra Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=599368 Link: https://lkml.kernel.org/r/20180803060943.2643-1-okaya@kernel.org --- kernel/watchdog_hld.c | 4 ++-- 1 file 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);