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Lei Chen reported a bug with CLOCK_MONOTONIC_COARSE having inconsistencies when NTP is adjusting the clock frequency. This has gone seemingly undetected for ~15 years, illustrating a clear gap in our testing. The skew_consistency test is intended to catch this sort of problem, but was focused on only evaluating CLOCK_MONOTONIC, and thus missed the problem on CLOCK_MONOTONIC_COARSE. So adjust the test to run with all clockids for 60 seconds each instead of 10 minutes with just CLOCK_MONOTONIC. Reported-by: Lei Chen <lei.chen@smartx.com> Signed-off-by: John Stultz <jstultz@google.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/all/20250320200306.1712599-2-jstultz@google.com Closes: https://lore.kernel.org/lkml/20250310030004.3705801-1-lei.chen@smartx.com/