Messages in this thread | | | Date | Mon, 14 Sep 2015 14:46:05 +0100 | From | Mark Rutland <> | Subject | LTP and commit e1d7ba8735551ed7 ("time: Always make sure wall_to_monotonic isn't positive") |
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Hi,
While testing v4.3-rc1 with the LTP, we spotted failures in a couple of timekeeping tests, which seem to be a result of commit e1d7ba8735551ed7 ("time: Always make sure wall_to_monotonic isn't positive").
In both cases this is because the new time would be before the boot time, so I guess these are covered by the caveat at the end of the commit message.
settimeofday01 [1] tries tries to settimeofday() with a timeval 100s and 100ns, while clock_gettime02 [2] tries to clock_settime to 1s and 100ns. Neither expect -EINVAL, and report failure with the new behaviour.
While I don't know that any "real" software is affected, I thought I should let you know.
Thanks, Mark.
[1] https://github.com/linux-test-project/ltp/blob/20150903/testcases/kernel/syscalls/settimeofday/settimeofday01.c [2] https://github.com/linux-test-project/ltp/blob/20150903/testcases/kernel/timers/clock_settime/clock_settime02.c
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