* Linus Torvalds <[EMAIL PROTECTED]> wrote: > > > On Tue, 4 Dec 2007, Luiz Fernando N. Capitulino wrote: > > > > sched_rr_get_interval(1, NULL); > > Looks like we have a zero "cfs_rq->load.weight". > > Ingo? Both sched_slice() and __sched_slice() do a divide by the > runqueue weight, and at least dequeue_task_fair() explicitly checks > for that being zero, so clearly zero is a possible value. Hmm?
yeah, i can reproduce this crash too. The problem is on SMP: if sched_rr_get_interval() gets a task from an otherwise idle runqueue, then rq->load.weight is 0. Normally sched_slice() is only used on a busy runqueue. So the correct fixup site is not in sched_slice() but in sys_sched_rr_get_interval() - i'm working on the right fix, i hope to be able to send a pull request in a few minutes. Ingo -- 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/