diff options
| author | Wanpeng Li <wanpeng.li@linux.intel.com> | 2014-11-05 09:14:37 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-11-16 10:58:55 +0100 |
| commit | 6c1d9410f007a26d13173cf17204cfd965f49b83 (patch) | |
| tree | ea09909badbde3bcdc9a0adf194cebb70e8dad2f /kernel/sched | |
| parent | a1bd5373357d3edc4b97548747d583c3efa484b3 (diff) | |
| download | lwn-6c1d9410f007a26d13173cf17204cfd965f49b83.tar.gz lwn-6c1d9410f007a26d13173cf17204cfd965f49b83.zip | |
sched: Move p->nr_cpus_allowed check to select_task_rq()
Move the p->nr_cpus_allowed check into kernel/sched/core.c: select_task_rq().
This change will make fair.c, rt.c, and deadline.c all start with the
same logic.
Suggested-and-Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "pang.xunlei" <pang.xunlei@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1415150077-59053-1-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 3 | ||||
| -rw-r--r-- | kernel/sched/deadline.c | 3 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 3 | ||||
| -rw-r--r-- | kernel/sched/rt.c | 3 |
4 files changed, 2 insertions, 10 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 3ccdce13484c..d44d0c59122b 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1411,7 +1411,8 @@ out: static inline int select_task_rq(struct task_struct *p, int cpu, int sd_flags, int wake_flags) { - cpu = p->sched_class->select_task_rq(p, cpu, sd_flags, wake_flags); + if (p->nr_cpus_allowed > 1) + cpu = p->sched_class->select_task_rq(p, cpu, sd_flags, wake_flags); /* * In order not to call set_task_cpu() on a blocking task we need diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index b0911797422f..bb1464baee84 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -928,9 +928,6 @@ select_task_rq_dl(struct task_struct *p, int cpu, int sd_flag, int flags) struct task_struct *curr; struct rq *rq; - if (p->nr_cpus_allowed == 1) - goto out; - if (sd_flag != SD_BALANCE_WAKE) goto out; diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index d11c57d651b0..8bca292f0803 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -4730,9 +4730,6 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f int want_affine = 0; int sync = wake_flags & WF_SYNC; - if (p->nr_cpus_allowed == 1) - return prev_cpu; - if (sd_flag & SD_BALANCE_WAKE) want_affine = cpumask_test_cpu(cpu, tsk_cpus_allowed(p)); diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index f1bb92fcc532..ee15f5a0d1c1 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1301,9 +1301,6 @@ select_task_rq_rt(struct task_struct *p, int cpu, int sd_flag, int flags) struct task_struct *curr; struct rq *rq; - if (p->nr_cpus_allowed == 1) - goto out; - /* For anything but wake ups, just return the task_cpu */ if (sd_flag != SD_BALANCE_WAKE && sd_flag != SD_BALANCE_FORK) goto out; |