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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-02-15 12:51:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-02-15 12:51:22 -0800 |
| commit | ef78e5b7de5da49769c337a17dcff7d4e82ee6cd (patch) | |
| tree | bf740e0d77eb2a6675827cd859ea7deae1bd6789 /kernel/sched/sched.h | |
| parent | da99f9355b53ebc565747d0072ff038f3d9fa875 (diff) | |
| parent | e9f5490c3574b435ce7fe7a71724aa3866babc7f (diff) | |
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Misc fixes all over the place:
- Fix NUMA over-balancing between lightly loaded nodes. This is
fallout of the big load-balancer rewrite.
- Fix the NOHZ remote loadavg update logic, which fixes anomalies
like reported 150 loadavg on mostly idle CPUs.
- Fix XFS performance/scalability
- Fix throttled groups unbound task-execution bug
- Fix PSI procfs boundary condition
- Fix the cpu.uclamp.{min,max} cgroup configuration write checks
- Fix DocBook annotations
- Fix RCU annotations
- Fix overly CPU-intensive housekeeper CPU logic loop on large CPU
counts"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Fix kernel-doc warning in attach_entity_load_avg()
sched/core: Annotate curr pointer in rq with __rcu
sched/psi: Fix OOB write when writing 0 bytes to PSI files
sched/fair: Allow a per-CPU kthread waking a task to stack on the same CPU, to fix XFS performance regression
sched/fair: Prevent unlimited runtime on throttled group
sched/nohz: Optimize get_nohz_timer_target()
sched/uclamp: Reject negative values in cpu_uclamp_write()
sched/fair: Allow a small load imbalance between low utilisation SD_NUMA domains
timers/nohz: Update NOHZ load in remote tick
sched/core: Don't skip remote tick for idle CPUs
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 1a88dc8ad11b..9ea647835fd6 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -896,7 +896,7 @@ struct rq { */ unsigned long nr_uninterruptible; - struct task_struct *curr; + struct task_struct __rcu *curr; struct task_struct *idle; struct task_struct *stop; unsigned long next_balance; @@ -2479,3 +2479,16 @@ static inline void membarrier_switch_mm(struct rq *rq, { } #endif + +#ifdef CONFIG_SMP +static inline bool is_per_cpu_kthread(struct task_struct *p) +{ + if (!(p->flags & PF_KTHREAD)) + return false; + + if (p->nr_cpus_allowed != 1) + return false; + + return true; +} +#endif |