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sched: do not keep current in the tree and get rid of sched_entity::fair_key

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Get rid of 'sched_entity::fair_key'.

As a side effect, 'current' is not kept withing the tree for 
SCHED_NORMAL/BATCH tasks anymore. This simplifies some parts of code 
(e.g. entity_tick() and yield_task_fair()) and also somewhat optimizes 
them (e.g. a single update_curr() now vs. dequeue/enqueue() before in 
entity_tick()).

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Dmitry Adamushko
2007-10-15 17:00:07 +02:00
committed by Ingo Molnar
parent 7074badbcb
commit 30cfdcfc5f
4 changed files with 36 additions and 22 deletions
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include/linux/sched.h
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@ -891,7 +891,6 @@ struct load_weight {
* 6 se->load.weight
*/
struct sched_entity {
s64 fair_key;
struct load_weight load; /* for load-balancing */
struct rb_node run_node;
unsigned int on_rq;