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    Subject[PATCH 5/9] sched/psi: don't create cgroup PSI files when psi_disabled
    Date
    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@bytedance.com>
    ---
    kernel/cgroup/cgroup.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
    index 1779ccddb734..1424da7ed2c4 100644
    --- a/kernel/cgroup/cgroup.c
    +++ b/kernel/cgroup/cgroup.c
    @@ -3700,6 +3700,9 @@ 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
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