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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-12-13 13:57:28 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2023-01-03 20:43:45 -0800 |
| commit | f092eb34b33043152bfb8a4ca01db9a06728261d (patch) | |
| tree | 06e8f71d54ea7a9a91fb150b807795e330897bdb /kernel/time/clocksource.c | |
| parent | c37e85c135cead4256dc8860073c468d8925c3df (diff) | |
| download | linux-f092eb34b33043152bfb8a4ca01db9a06728261d.tar.gz | |
clocksource: Improve read-back-delay message
When cs_watchdog_read() is unable to get a qualifying clocksource read
within the limit set by max_cswd_read_retries, it prints a message
and marks the clocksource under test as unstable. But that message is
unclear to anyone unfamiliar with the code:
clocksource: timekeeping watchdog on CPU13: wd-tsc-wd read-back delay 1000614ns, attempt 3, marking unstable
Therefore, add some context so that the message appears as follows:
clocksource: timekeeping watchdog on CPU13: wd-tsc-wd excessive read-back delay of 1000614ns vs. limit of 125000ns, wd-wd read-back delay only 27ns, attempt 3, marking tsc unstable
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: John Stultz <jstultz@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Feng Tang <feng.tang@intel.com>
Diffstat (limited to 'kernel/time/clocksource.c')
| -rw-r--r-- | kernel/time/clocksource.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index a3d19f6660ac79..b59914953809fd 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -260,8 +260,8 @@ static enum wd_read_status cs_watchdog_read(struct clocksource *cs, u64 *csnow, goto skip_test; } - pr_warn("timekeeping watchdog on CPU%d: wd-%s-wd read-back delay of %lldns, attempt %d, marking unstable\n", - smp_processor_id(), cs->name, wd_delay, nretries); + pr_warn("timekeeping watchdog on CPU%d: wd-%s-wd excessive read-back delay of %lldns vs. limit of %ldns, wd-wd read-back delay only %lldns, attempt %d, marking %s unstable\n", + smp_processor_id(), cs->name, wd_delay, WATCHDOG_MAX_SKEW, wd_seq_delay, nretries, cs->name); return WD_READ_UNSTABLE; skip_test: |