| From | Alex Shi <> | Subject | [PATCH v3 04/22] sched: don't need go to smaller sched domain | Date | Sat, 5 Jan 2013 16:37:33 +0800 |
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If parent sched domain has no task allowed cpu find. neither find in it's child. So, go out to save useless checking.
Signed-off-by: Alex Shi <alex.shi@intel.com> --- kernel/sched/fair.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 3c7b09a..ecfbf8e 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3378,10 +3378,8 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags) load_idx = sd->wake_idx; group = find_idlest_group(sd, p, cpu, load_idx); - if (!group) { - sd = sd->child; - continue; - } + if (!group) + goto unlock; new_cpu = find_idlest_cpu(group, p, cpu); -- 1.7.12
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