commit 3958e2d0c34e ("cgroup: make per-cgroup pressure stall tracking configurable")
make PSI can be configured to skip per-cgroup stall accounting. And
doesn't expose PSI files in cgroup hierarchy.
This patch do the same thing when psi_disabled.
Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
---
kernel/cgroup/cgroup.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 13c8e91d7862..5f88117fc81e 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -3709,6 +3709,9 @@ static void cgroup_pressure_release(struct kernfs_open_file *of)
bool cgroup_psi_enabled(void)
{
+ if (static_branch_likely(&psi_disabled))
+ return false;
+
return (cgroup_feature_disable_mask & (1 << OPT_FEATURE_PRESSURE)) == 0;
}
--
2.36.1
