[EMAIL PROTECTED] wrote: > > Hello! > > > > A while back I reported the lost need_resched flag bug ( it happens if > > > need_resched is set right before switch_to() is called). Later on a one-line > > > fix is added to __schedule_tail(). > > > > > > current->need_resched |= prev->need_resched; > > > > > > I looked at the latest kernel and found this one is gone. Is the lost > > > need_resched problem taken care of in some other way? Or is it re-introduced? > > It is removed not only because it was wrong (which you have found too), > but because it was useless even if copied correctly. > > current->need_resched is not changed in interrupt context outside > runqueue lock except for scheduler timer, where copying results > in nothing but spurious reschedule. > > Alexey Alexey, I think wake_up_process() is called in interrupt routine quite often and it will set need_resched flag (through reschedule_idle()). ??? I did several run time tests and confirmed the missing need_resched flag was happening. Ether some new code takes care of it. Or it is still there. Jun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
