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authorWanpeng Li <wanpeng.li@linux.intel.com>2014-11-05 09:14:37 +0800
committerIngo Molnar <mingo@kernel.org>2014-11-16 10:58:55 +0100
commit6c1d9410f007a26d13173cf17204cfd965f49b83 (patch)
treeea09909badbde3bcdc9a0adf194cebb70e8dad2f /kernel/sched
parenta1bd5373357d3edc4b97548747d583c3efa484b3 (diff)
downloadop-kernel-dev-6c1d9410f007a26d13173cf17204cfd965f49b83.zip
op-kernel-dev-6c1d9410f007a26d13173cf17204cfd965f49b83.tar.gz
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.c3
-rw-r--r--kernel/sched/deadline.c3
-rw-r--r--kernel/sched/fair.c3
-rw-r--r--kernel/sched/rt.c3
4 files changed, 2 insertions, 10 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3ccdce1..d44d0c5 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 b091179..bb1464b 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 d11c57d..8bca292 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 f1bb92f..ee15f5a 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;
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