On 05/29/2015 04:24 PM, John Stultz wrote: > As Prarit reported here: > https://lkml.org/lkml/2015/5/27/458 > > Since the leapsecond is applied at timer tick time, and not > the actual second edge, ABS_TIME CLOCK_REALTIME timers set for > right after the leapsecond could fire a second early, since > some timers may be expired before we trigger the timekeeping > timer, which then applies the leapsecond. > > Thus this patch series tries to address this isssue, including > extending the leap-a-day test to catch this problem, as well > as other relevant fixups I found while working on the code. > > 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 > > Thougths and feedback would be appreciated!
Testing now ... P. > thanks > -john > > Cc: Prarit Bhargava <[email protected]> > Cc: Daniel Bristot de Oliveira <[email protected]> > Cc: Richard Cochran <[email protected]> > Cc: Jan Kara <[email protected]> > Cc: Jiri Bohac <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: Shuah Khan <[email protected]> > > John Stultz (4): > selftests: timers: Add leap-second timer edge testing to leap-a-day.c > timer_list: Add the base offset so remaining nsecs are accurate for > non monotonic timers > ntp: Use printk_deferred in leapsecond path > time: Do leapsecond adjustment in gettime fastpaths > > include/linux/time64.h | 1 + > include/linux/timekeeper_internal.h | 7 +++ > kernel/time/ntp.c | 77 ++++++++++++++++++++--- > kernel/time/ntp_internal.h | 1 + > kernel/time/timekeeping.c | 97 > +++++++++++++++++++++++++---- > kernel/time/timer_list.c | 2 +- > tools/testing/selftests/timers/leap-a-day.c | 76 ++++++++++++++++++++-- > 7 files changed, 234 insertions(+), 27 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
