Messages in this thread | | | Date | Fri, 12 Jun 2015 10:59:59 -0400 | From | Dave Jones <> | Subject | Re: [PATCH 0/5 v2] Fixes for leapsecond expiring early ABS_TIME CLOCK_REALTIME timers |
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On Fri, Jun 12, 2015 at 10:55:57AM -0400, Prarit Bhargava wrote:
> > > This series has only had limited testing, so I wanted to send > > > it out for initial review and comment. Folks can grab this tree > > > via git for testing here: > > > https://git.linaro.org/people/john.stultz/linux.git dev/early-leap-timer > > > > Any idea how far back this reaches ? Ie, which longterm stable releases > > might be affected by this ? > > Likely occurs in any kernel after NOHZ was introduced.
At least on 3.14, it seems to happen even if NOHZ is disabled.
# ./leap -i 5 -s Setting time to speed up testing Running for 5 iterations. Press ctrl-c to stop
Setting time to Sat Jun 13 23:59:50 2015 Scheduling leap second for Sun Jun 14 00:00:00 2015 Setting timer for Sun Jun 14 00:00:00 2015 Sat Jun 13 23:59:57 2015 + 55 us (1) TIME_INS Sat Jun 13 23:59:57 2015 + 500127 us (1) TIME_INS Sat Jun 13 23:59:58 2015 + 189 us (1) TIME_INS Sat Jun 13 23:59:58 2015 + 500250 us (1) TIME_INS Sat Jun 13 23:59:59 2015 + 312 us (1) TIME_INS Sat Jun 13 23:59:59 2015 + 500372 us (1) TIME_INS Sun Jun 14 00:00:00 2015 + 3 us (1) TIME_INS - TIMER FIRED Error: Incorrect NTP state? Sun Jun 14 00:00:00 2015 + 12 us (1) TIME_INS Sat Jun 13 23:59:59 2015 + 500068 us (2) TIME_OOP Sun Jun 14 00:00:00 2015 + 130 us (2) TIME_OOP Sun Jun 14 00:00:00 2015 + 500190 us (2) TIME_WAIT Sun Jun 14 00:00:01 2015 + 256 us (2) TIME_WAIT Sun Jun 14 00:00:01 2015 + 500315 us (2) TIME_WAIT Sun Jun 14 00:00:02 2015 + 376 us (2) TIME_WAIT Leap complete Errors observed
Dave
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