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| author | Tejun Heo <tj@kernel.org> | 2018-04-26 14:29:05 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2018-04-26 14:29:05 -0700 |
| commit | 8f53470bab04229e93ff9e4c20338cc08b42b344 (patch) | |
| tree | 8ab616e9b6ee8b2affcbe88278961d5e8bdc7eb3 /include/linux/cgroup-defs.h | |
| parent | 0fa294fb1985c06c4e3325e30e759d4ca580f59a (diff) | |
| download | lwn-8f53470bab04229e93ff9e4c20338cc08b42b344.tar.gz lwn-8f53470bab04229e93ff9e4c20338cc08b42b344.zip | |
cgroup: Add cgroup_subsys->css_rstat_flush()
This patch adds cgroup_subsys->css_rstat_flush(). If a subsystem has
this callback, its csses are linked on cgrp->css_rstat_list and rstat
will call the function whenever the associated cgroup is flushed.
Flush is also performed when such csses are released so that residual
counts aren't lost.
Combined with the rstat API previous patches factored out, this allows
controllers to plug into rstat to manage their statistics in a
scalable way.
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/linux/cgroup-defs.h')
| -rw-r--r-- | include/linux/cgroup-defs.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 60d62fe97dc3..c0e68f903011 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -130,6 +130,9 @@ struct cgroup_subsys_state { struct list_head sibling; struct list_head children; + /* flush target list anchored at cgrp->rstat_css_list */ + struct list_head rstat_css_node; + /* * PI: Subsys-unique ID. 0 is unused and root is always 1. The * matching css can be looked up using css_from_id(). @@ -412,6 +415,7 @@ struct cgroup { /* per-cpu recursive resource statistics */ struct cgroup_rstat_cpu __percpu *rstat_cpu; + struct list_head rstat_css_list; /* cgroup basic resource statistics */ struct cgroup_base_stat pending_bstat; /* pending from children */ @@ -577,6 +581,7 @@ struct cgroup_subsys { void (*css_released)(struct cgroup_subsys_state *css); void (*css_free)(struct cgroup_subsys_state *css); void (*css_reset)(struct cgroup_subsys_state *css); + void (*css_rstat_flush)(struct cgroup_subsys_state *css, int cpu); int (*css_extra_stat_show)(struct seq_file *seq, struct cgroup_subsys_state *css); |