Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6bc1665ba71de0f207391b01b187b21b2619c15c
Commit: 6bc1665ba71de0f207391b01b187b21b2619c15c
Parent: cc367732ff0b1c63d0d7bdd11e6d1661794ef6a3
Author: Ingo Molnar <[EMAIL PROTECTED]>
AuthorDate: Mon Oct 15 17:00:18 2007 +0200
Committer: Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Mon Oct 15 17:00:18 2007 +0200
sched: allow the immediate migration of cache-cold tasks
allow the immediate migration of cache-cold tasks.
Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
---
kernel/sched.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/kernel/sched.c b/kernel/sched.c
index 3b27c3a..7506127 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1016,6 +1016,11 @@ task_hot(struct task_struct *p, u64 now, struct
sched_domain *sd)
if (p->sched_class != &fair_sched_class)
return 0;
+ if (sysctl_sched_migration_cost == -1)
+ return 1;
+ if (sysctl_sched_migration_cost == 0)
+ return 0;
+
delta = now - p->se.exec_start;
return delta < (s64)sysctl_sched_migration_cost;
@@ -2189,7 +2194,8 @@ int can_migrate_task(struct task_struct *p, struct rq
*rq, int this_cpu,
* 2) too many balance attempts have failed.
*/
- if (sd->nr_balance_failed > sd->cache_nice_tries) {
+ if (!task_hot(p, rq->clock, sd) ||
+ sd->nr_balance_failed > sd->cache_nice_tries) {
#ifdef CONFIG_SCHEDSTATS
if (task_hot(p, rq->clock, sd)) {
schedstat_inc(sd, lb_hot_gained[idle]);
-
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