Messages in this thread | | | Date | Tue, 12 Aug 2014 01:00:20 +0200 | From | Frederic Weisbecker <> | Subject | Re: [PATCH 0/2] nohz: Avoid double clock write |
| |
Ping?
On Thu, Jul 31, 2014 at 06:45:54PM +0200, Frederic Weisbecker wrote: > Hi Thomas, > > The tick reschedules itself unconditionally. That's what we want as long > as the CPU is in periodic mode. It's not that relevant when the CPU > is in dynticks mode though as the clock write is likely to be overwritten > by the nohz code on irq exit. > > In low-res mode, that even result in unexpected periodic behaviour when > no timer is scheduled in the future. > > So here is a set that proposes the removal of these double writes. > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > origin/nohz/drop-double-write-v2 > > Thanks, > Frederic > --- > > Viresh Kumar (2): > nohz: Fix spurious periodic tick behaviour in low-res dynticks mode > nohz: Avoid tick's double reprogramming in highres mode > > > kernel/time/tick-sched.c | 8 ++++++++ > 1 file changed, 8 insertions(+)
| |