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| author |   Xunlei Pang <pang.xunlei@linaro.org> | 2015-01-19 04:49:36 +0000 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-01-30 19:39:16 +0100 |
| commit | 16b269436b7213ebc01dcfcc9dafa8535b676ccb (patch) | |
| tree | 430aa2ee5f76f7de1bfa393cd8ad36e4a09e5f45 /kernel/sched/deadline.c | |
| parent | sched/idle: Add missing checks to the exit condition of cpu_idle_poll() (diff) | |
| download | linux-dev-16b269436b7213ebc01dcfcc9dafa8535b676ccb.tar.xz linux-dev-16b269436b7213ebc01dcfcc9dafa8535b676ccb.zip | |
sched/deadline: Modify cpudl::free_cpus to reflect rd->online
Currently, cpudl::free_cpus contains all CPUs during init, see
cpudl_init(). When calling cpudl_find(), we have to add rd->span
to avoid selecting the cpu outside the current root domain, because
cpus_allowed cannot be depended on when performing clustered
scheduling using the cpuset, see find_later_rq().
This patch adds cpudl_set_freecpu() and cpudl_clear_freecpu() for
changing cpudl::free_cpus when doing rq_online_dl()/rq_offline_dl(),
so we can avoid the rd->span operation when calling cpudl_find()
in find_later_rq().
Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1421642980-10045-1-git-send-email-pang.xunlei@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/deadline.c')
| -rw-r--r-- | kernel/sched/deadline.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index b52092f2636d..e7b272233c5c 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1165,9 +1165,6 @@ static int find_later_rq(struct task_struct *task) * We have to consider system topology and task affinity * first, then we can look for a suitable cpu. */ - cpumask_copy(later_mask, task_rq(task)->rd->span); - cpumask_and(later_mask, later_mask, cpu_active_mask); - cpumask_and(later_mask, later_mask, &task->cpus_allowed); best_cpu = cpudl_find(&task_rq(task)->rd->cpudl, task, later_mask); if (best_cpu == -1) @@ -1562,6 +1559,7 @@ static void rq_online_dl(struct rq *rq) if (rq->dl.overloaded) dl_set_overload(rq); + cpudl_set_freecpu(&rq->rd->cpudl, rq->cpu); if (rq->dl.dl_nr_running > 0) cpudl_set(&rq->rd->cpudl, rq->cpu, rq->dl.earliest_dl.curr, 1); } @@ -1573,6 +1571,7 @@ static void rq_offline_dl(struct rq *rq) dl_clear_overload(rq); cpudl_set(&rq->rd->cpudl, rq->cpu, 0, 0); + cpudl_clear_freecpu(&rq->rd->cpudl, rq->cpu); } void init_sched_dl_class(void) |