It is found that attaching a task to the top_cpuset does not currently
ignore CPUs allocated to subpartitions in cpuset_attach_task(). So the
code is changed to fix that.
Signed-off-by: Waiman Long <[email protected]>
Reviewed-by: Michal Koutný <[email protected]>
---
kernel/cgroup/cpuset.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index a331e11e3d20..8fd90f7bdeb0 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -2540,7 +2540,8 @@ static void cpuset_attach_task(struct cpuset *cs, struct task_struct *task)
if (cs != &top_cpuset)
guarantee_online_cpus(task, cpus_attach);
else
- cpumask_copy(cpus_attach, task_cpu_possible_mask(task));
+ cpumask_andnot(cpus_attach, task_cpu_possible_mask(task),
+ cs->subparts_cpus);
/*
* can_attach beforehand should guarantee that this doesn't
* fail. TODO: have a better way to handle failure here
--
2.31.1