diff options
| author | Waiman Long <longman@redhat.com> | 2023-04-11 09:36:00 -0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2023-04-12 08:23:58 -1000 |
| commit | 7e27cb6ad4d85fc8bac2a2a896da62ef66b8598e (patch) | |
| tree | fcba6d0b65c67f720e6410ba684637295bf960bd /kernel/cgroup | |
| parent | eee87853794187f6adbe19533ed79c8b44b36a91 (diff) | |
| download | lwn-7e27cb6ad4d85fc8bac2a2a896da62ef66b8598e.tar.gz lwn-7e27cb6ad4d85fc8bac2a2a896da62ef66b8598e.zip | |
cgroup/cpuset: Make cpuset_attach_task() skip subpartitions CPUs for top_cpuset
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 <longman@redhat.com>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup')
| -rw-r--r-- | kernel/cgroup/cpuset.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 166a45019f66..505d86b16642 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -2535,7 +2535,8 @@ 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 |