redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

sched: re-do "sched: fix fair sleepers" 

re-apply:

| commit e22ecef1d2
| Author: Ingo Molnar <mingo@elte.hu>
| Date:   Fri Mar 14 22:16:08 2008 +0100
|
|     sched: fix fair sleepers
|
|     Fair sleepers need to scale their latency target down by runqueue
|     weight. Otherwise busy systems will gain ever larger sleep bonus.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Ingo Molnar 2008-04-14 08:53:32 +02:00
parent 3925e6fc1f
commit 018d6db4cb
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/sched_fair.c
View File

@ -510,8 +510,10 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
if (!initial) {
/* sleeps upto a single latency don't count. */
if (sched_feat(NEW_FAIR_SLEEPERS))
vruntime -= sysctl_sched_latency;
if (sched_feat(NEW_FAIR_SLEEPERS)) {
vruntime -= calc_delta_fair(sysctl_sched_latency,
&cfs_rq->load);
}
/* ensure we never gain time by being placed backwards. */
vruntime = max_vruntime(se->vruntime, vruntime);