Messages in this thread | | | Subject | Re: [PATCH 3/7] sched: Update rq clock on tickless CPUs before calling check_preempt_curr() | From | Peter Zijlstra <> | Date | Tue, 09 Apr 2013 15:18:28 +0200 |
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On Sat, 2013-04-06 at 18:45 +0200, Frederic Weisbecker wrote: > check_preempt_wakeup() of fair class needs an uptodate sched clock > value to update runtime stats of the current task. > > When a task is woken up, activate_task() is usually called right > before > ttwu_do_wakeup() unless the task is still in the runqueue. In this > case we need to update the rq clock manually in case the CPU runs > tickless because ttwu_do_wakeup() calls check_preempt_wakeup().
again, same story.. I think the entire nohz specific clock update stuff is completely broken and you're finding sites that are simply missing clock updates.
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