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sched/psi: Consolidate cgroup_psi()

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cgroup_psi() can't return psi_group for root cgroup, so we have many
open code "psi = cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi".

This patch move cgroup_psi() definition to <linux/psi.h>, in which
we can return psi_system for root cgroup, so can handle all cgroups.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lore.kernel.org/r/20220825164111.29534-9-zhouchengming@bytedance.com
This commit is contained in:
Chengming Zhou
2022-08-26 00:41:09 +08:00
committed by Peter Zijlstra
parent 52b1364ba0
commit 57899a6610
3 changed files with 11 additions and 10 deletions
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5
include/linux/cgroup.h
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@@ -673,11 +673,6 @@ static inline void pr_cont_cgroup_path(struct cgroup *cgrp)
pr_cont_kernfs_path(cgrp->kn);
}
static inline struct psi_group *cgroup_psi(struct cgroup *cgrp)
{
return cgrp->psi;
}
bool cgroup_psi_enabled(void);
static inline void cgroup_init_kthreadd(void)