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authorIngo Molnar <mingo@kernel.org>2019-12-25 10:41:37 +0100
committerIngo Molnar <mingo@kernel.org>2019-12-25 10:41:37 +0100
commit1e5f8a308551b9816588e12bb795aeadebe37c4a (patch)
treebd71fc796fed24a3b7cc99df4a1d1bdaecc2b387 /kernel/sched/fair.c
parenta5e37de90e67ac1072a9a44bd0cec9f5e98ded08 (diff)
parent46cf053efec6a3a5f343fead837777efe8252a46 (diff)
Merge tag 'v5.5-rc3' into sched/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched/fair.c')
-rw-r--r--kernel/sched/fair.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 280d54ccb4be..8da0222924cf 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7329,7 +7329,14 @@ static int detach_tasks(struct lb_env *env)
load < 16 && !env->sd->nr_balance_failed)
goto next;
- if (load/2 > env->imbalance)
+ /*
+ * Make sure that we don't migrate too much load.
+ * Nevertheless, let relax the constraint if
+ * scheduler fails to find a good waiting task to
+ * migrate.
+ */
+ if (load/2 > env->imbalance &&
+ env->sd->nr_balance_failed <= env->sd->cache_nice_tries)
goto next;
env->imbalance -= load;
@@ -8418,6 +8425,10 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p,
if (!idlest)
return NULL;
+ /* The local group has been skipped because of CPU affinity */
+ if (!local)
+ return idlest;
+
/*
* If the local group is idler than the selected idlest group
* don't try and push the task.