lkml.org 
[lkml]   [2013]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 04/22] sched: don't need go to smaller sched domain
Date
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


\
 
 \ /
  Last update: 2013-01-05 10:41    [W:0.309 / U:0.104 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site