On Fri, Oct 26, 2018 at 07:13:00PM +0200, Miroslav Lichvar wrote: > The timecounter needs to be updated at least once per ~550 seconds in > order to avoid a 40-bit SYSTIM timestamp to be misinterpreted as an old > timestamp. > > Since commit 500462a9de65 ("timers: Switch to a non-cascading wheel"), > scheduling of delayed work seems to be less accurate and a requested > delay of 540 seconds may actually be longer than 550 seconds. Also, the > PHC may be adjusted to run up to 6% faster than real time and the system > clock up to 10% slower. Shorten the delay to 360 seconds to be sure the > timecounter is updated in time. > > This fixes an issue with HW timestamps on 82580/I350/I354 being off by > ~1100 seconds for few seconds every ~9 minutes.
Acked-by: Richard Cochran <richardcoch...@gmail.com>