On Tue, Mar 01, 2016 at 08:15:55AM +0000, Greg KH wrote: > On Tue, Jan 05, 2016 at 05:52:11PM +0900, Byungchul Park wrote: > > > > Upstream commits to be applied > > ============================== > > > > e3fca9e: sched: Replace post_schedule with a balance callback list > > 4c9a4bc: sched: Allow balance callbacks for check_class_changed() > > 8046d68: sched,rt: Remove return value from pull_rt_task() > > fd7a4be: sched, rt: Convert switched_{from, to}_rt() / prio_changed_rt() to balance callbacks > > 0ea60c2: sched,dl: Remove return value from pull_dl_task() > > 9916e21: sched, dl: Convert switched_{from, to}_dl() / prio_changed_dl() to balance callbacks > > > > The reason why these should be applied > > ====================================== > > > > Our products developed using 3.16 kernel, faced a kernel oops which can > > be fixed with above upstreamed patches. The oops is caused by "Unable > > to handle kernel NULL pointer dereference at virtual address 000000xx" > > in the call path, > > > > __sched_setscheduler() > > check_class_changed() > > switched_to_fair() > > check_preempt_curr() > > check_preempt_wakeup() > > find_matching_se() > > is_same_group() > > > > by "if (se->cfs_rq == pse->cfs_rq) // se, pse == NULL" condition. > > > > How to apply it > > =============== > > > > For stable 4.2.8+: > > N/A (already applied) > > > > For longterm 4.1.15: > > Cherry-picking the upsteam commits works with a trivial conflict. > > > > For longterm 3.18.25: > > Refer to the backported patches in this thread. > > > > For longterm 3.14.58: > > Refer to the backported patches in this thread. And applying > > additional "6c3b4d4: sched: Clean up idle task SMP logic" commit > > makes backporting the upstream commits much simpler. So my > > backporting patches include the patch. > > All now applied to the 3.14-stable queue, thanks. Hello, I realized this was not applied to 3.18-stable yet. Is there any reason? Thanks, Byungchul > > greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html