diff options
| author | Juri Lelli <juri.lelli@arm.com> | 2014-10-28 12:54:46 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-11-04 07:17:52 +0100 |
| commit | 75e23e49dbdd86aace375f599062aa67483a001b (patch) | |
| tree | d3a26f83ed3a411b966193ab051901a8a5c60f1c /kernel/sched | |
| parent | sched: Check if we got a shallowest_idle_cpu before searching for least_loade... (diff) | |
| download | linux-75e23e49dbdd86aace375f599062aa67483a001b.tar.xz linux-75e23e49dbdd86aace375f599062aa67483a001b.zip | |
sched/core: Use dl_bw_of() under rcu_read_lock_sched()
As per commit f10e00f4bf36 ("sched/dl: Use dl_bw_of() under
rcu_read_lock_sched()"), dl_bw_of() has to be protected by
rcu_read_lock_sched().
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1414497286-28824-1-git-send-email-juri.lelli@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 379cb87da69d..df0569ebec0f 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4661,6 +4661,7 @@ int cpuset_cpumask_can_shrink(const struct cpumask *cur, struct dl_bw *cur_dl_b; unsigned long flags; + rcu_read_lock_sched(); cur_dl_b = dl_bw_of(cpumask_any(cur)); trial_cpus = cpumask_weight(trial); @@ -4669,6 +4670,7 @@ int cpuset_cpumask_can_shrink(const struct cpumask *cur, cur_dl_b->bw * trial_cpus < cur_dl_b->total_bw) ret = 0; raw_spin_unlock_irqrestore(&cur_dl_b->lock, flags); + rcu_read_unlock_sched(); return ret; } @@ -4697,11 +4699,13 @@ int task_can_attach(struct task_struct *p, cs_cpus_allowed)) { unsigned int dest_cpu = cpumask_any_and(cpu_active_mask, cs_cpus_allowed); - struct dl_bw *dl_b = dl_bw_of(dest_cpu); + struct dl_bw *dl_b; bool overflow; int cpus; unsigned long flags; + rcu_read_lock_sched(); + dl_b = dl_bw_of(dest_cpu); raw_spin_lock_irqsave(&dl_b->lock, flags); cpus = dl_bw_cpus(dest_cpu); overflow = __dl_overflow(dl_b, cpus, 0, p->dl.dl_bw); @@ -4717,6 +4721,7 @@ int task_can_attach(struct task_struct *p, __dl_add(dl_b, p->dl.dl_bw); } raw_spin_unlock_irqrestore(&dl_b->lock, flags); + rcu_read_unlock_sched(); } #endif |