f4b936f5d6
- Make the conditional update of the overutilized state work correctly by
caching the relevant flags state before overwriting them and checking
them afterwards.
- Fix a data race in the wakeup path which caused loadavg on ARM64
platforms to become a random number generator.
- Fix the ordering of the iowaiter accounting operations so it can't be
decremented before it is incremented.
- Fix a bug in the deadline scheduler vs. priority inheritance when a
non-deadline task A has inherited the parameters of a deadline task B
and then blocks on a non-deadline task C.
The second inheritance step used the static deadline parameters of task
A, which are usually 0, instead of further propagating task B's
parameters. The zero initialized parameters trigger a bug in the
deadline scheduler.
-----BEGIN PGP SIGNATURE-----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=HiGq
-----END PGP SIGNATURE-----
Merge tag 'sched-urgent-2020-11-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
"A couple of scheduler fixes:
- Make the conditional update of the overutilized state work
correctly by caching the relevant flags state before overwriting
them and checking them afterwards.
- Fix a data race in the wakeup path which caused loadavg on ARM64
platforms to become a random number generator.
- Fix the ordering of the iowaiter accounting operations so it can't
be decremented before it is incremented.
- Fix a bug in the deadline scheduler vs. priority inheritance when a
non-deadline task A has inherited the parameters of a deadline task
B and then blocks on a non-deadline task C.
The second inheritance step used the static deadline parameters of
task A, which are usually 0, instead of further propagating task
B's parameters. The zero initialized parameters trigger a bug in
the deadline scheduler"
* tag 'sched-urgent-2020-11-22' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/deadline: Fix priority inheritance with multiple scheduling classes
sched: Fix rq->nr_iowait ordering
sched: Fix data-race in wakeup
sched/fair: Fix overutilized update in enqueue_task_fair()
|
||
|---|---|---|
| .. | ||
| acpi | ||
| asm-generic | ||
| clocksource | ||
| crypto | ||
| drm | ||
| dt-bindings | ||
| keys | ||
| kunit | ||
| kvm | ||
| linux | ||
| math-emu | ||
| media | ||
| memory | ||
| misc | ||
| net | ||
| pcmcia | ||
| ras | ||
| rdma | ||
| scsi | ||
| soc | ||
| sound | ||
| target | ||
| trace | ||
| uapi | ||
| vdso | ||
| video | ||
| xen | ||