diff options
| author | Jon Medhurst (Tixy) <tixy@linaro.org> | 2013-08-02 18:45:33 +0100 |
|---|---|---|
| committer | Jon Medhurst <tixy@linaro.org> | 2013-09-05 17:50:06 +0100 |
| commit | 0d5ddd14a8e67d35fad79caf479cca54a6788cc9 (patch) | |
| tree | 7bf034ad31d46e2ce253bc1aaa2c19f679ab1eab | |
| parent | 4ab2679351e9566a6b0822f2d841a902758ba066 (diff) | |
HMP: Check the system has little cpus before forcing rt tasks onto them
It is sometimes desirable to run a kernel with HMP scheduling enabled
on a system which is not big.LITTLE, e.g. when building a multi-platform
kernel, or when testing a big.LITTLE system with one cluster disabled.
We should therefore allow for the situation where is no little domain.
Signed-off-by: Jon Medhurst <tixy@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | kernel/sched/core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 50d9e9849ce..fb9b7b74a83 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3841,8 +3841,9 @@ __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio) if (rt_prio(p->prio)) { p->sched_class = &rt_sched_class; #ifdef CONFIG_SCHED_HMP - if (cpumask_equal(&p->cpus_allowed, cpu_all_mask)) - do_set_cpus_allowed(p, &hmp_slow_cpu_mask); + if (!cpumask_empty(&hmp_slow_cpu_mask)) + if (cpumask_equal(&p->cpus_allowed, cpu_all_mask)) + do_set_cpus_allowed(p, &hmp_slow_cpu_mask); #endif } else |