On Tue, 2016-01-05 at 17:52 +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. I've used your patches for 3.18.25 as the basis for backporting to 3.16 longterm. Thanks. Ben. > 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. > > For longterm 2.6.32.69 ~ 3.12.51: Need to be backported. (I didn't) -- Ben Hutchings One of the nice things about standards is that there are so many of them.
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