diff options
| -rw-r--r-- | kernel/time/clocksource.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index ee0ad5e4d517..23336eecb4f4 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -244,6 +244,7 @@ enum wd_read_status { static enum wd_read_status cs_watchdog_read(struct clocksource *cs, u64 *csnow, u64 *wdnow) { + int64_t md = 2 * watchdog->uncertainty_margin; unsigned int nretries, max_retries; int64_t wd_delay, wd_seq_delay; u64 wd_end, wd_end2; @@ -258,7 +259,7 @@ static enum wd_read_status cs_watchdog_read(struct clocksource *cs, u64 *csnow, local_irq_enable(); wd_delay = cycles_to_nsec_safe(watchdog, *wdnow, wd_end); - if (wd_delay <= WATCHDOG_MAX_SKEW) { + if (wd_delay <= md + cs->uncertainty_margin) { if (nretries > 1 && nretries >= max_retries) { pr_warn("timekeeping watchdog on CPU%d: %s retried %d times before success\n", smp_processor_id(), watchdog->name, nretries); @@ -271,12 +272,12 @@ static enum wd_read_status cs_watchdog_read(struct clocksource *cs, u64 *csnow, * there is too much external interferences that cause * significant delay in reading both clocksource and watchdog. * - * If consecutive WD read-back delay > WATCHDOG_MAX_SKEW/2, - * report system busy, reinit the watchdog and skip the current + * If consecutive WD read-back delay > md, report + * system busy, reinit the watchdog and skip the current * watchdog test. */ wd_seq_delay = cycles_to_nsec_safe(watchdog, wd_end, wd_end2); - if (wd_seq_delay > WATCHDOG_MAX_SKEW/2) + if (wd_seq_delay > md) goto skip_test; } |