Messages in this thread Patch in this message | | | Date | Fri, 3 Aug 2018 03:24:50 -0700 | From | tip-bot for Sinan Kaya <> | Subject | [tip:sched/core] watchdog: Reduce message verbosity |
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Commit-ID: 1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e Gitweb: https://git.kernel.org/tip/1b6266ebe3da8198e9a02fbad77bbb56e2f7ce2e Author: Sinan Kaya <okaya@kernel.org> AuthorDate: Thu, 2 Aug 2018 23:09:41 -0700 Committer: Thomas Gleixner <tglx@linutronix.de> CommitDate: Fri, 3 Aug 2018 12:19:08 +0200
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
--- 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);
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