Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=502d26b524d8980f3ed80d9aec398e85671a8160
Commit: 502d26b524d8980f3ed80d9aec398e85671a8160
Parent: 77d9cc44b543fa831169e54c495ad06ef3a0c726
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Fri Nov 9 22:39:39 2007 +0100
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Fri Nov 9 22:39:39 2007 +0100
sched: clean up the wakeup preempt check, #2
clean up the preemption check to not use unnecessary 64-bit
variables. This improves code size:
text data bss dec hex filename
44227 3326 36 47589 b9e5 sched.o.before
44201 3326 36 47563 b9cb sched.o.after
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
kernel/sched_fair.c | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index d558716..6c36147 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -837,7 +837,7 @@ static void check_preempt_wakeup(struct rq *rq, struct
task_struct *p)
struct task_struct *curr = rq->curr;
struct cfs_rq *cfs_rq = task_cfs_rq(curr);
struct sched_entity *se = &curr->se, *pse = &p->se;
- s64 delta, gran;
+ unsigned long gran;
if (unlikely(rt_prio(p->prio))) {
update_rq_clock(rq);
@@ -860,12 +860,11 @@ static void check_preempt_wakeup(struct rq *rq, struct
task_struct *p)
pse = parent_entity(pse);
}
- delta = se->vruntime - pse->vruntime;
gran = sysctl_sched_wakeup_granularity;
if (unlikely(se->load.weight != NICE_0_LOAD))
gran = calc_delta_fair(gran, &se->load);
- if (delta > gran)
+ if (pse->vruntime + gran < se->vruntime)
resched_task(curr);
}
-
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