diff options
| author | JP Kobryn <inwardvessel@gmail.com> | 2025-05-14 17:19:35 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2025-05-19 10:29:42 -1000 |
| commit | 748922dcfabdd655d25fb6dd09a60e694a3d35e6 (patch) | |
| tree | bac6da9c031fab4a6d40efa2a4feb0494cda38d6 /kernel/cgroup/cgroup-internal.h | |
| parent | 5da3bfa029d6809e192d112f39fca4dbe0137aaf (diff) | |
cgroup: use subsystem-specific rstat locks to avoid contention
It is possible to eliminate contention between subsystems when
updating/flushing stats by using subsystem-specific locks. Let the existing
rstat locks be dedicated to the cgroup base stats and rename them to
reflect that. Add similar locks to the cgroup_subsys struct for use with
individual subsystems.
Lock initialization is done in the new function ss_rstat_init(ss) which
replaces cgroup_rstat_boot(void). If NULL is passed to this function, the
global base stat locks will be initialized. Otherwise, the subsystem locks
will be initialized.
Change the existing lock helper functions to accept a reference to a css.
Then within these functions, conditionally select the appropriate locks
based on the subsystem affiliation of the given css. Add helper functions
for this selection routine to avoid repeated code.
Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/cgroup-internal.h')
| -rw-r--r-- | kernel/cgroup/cgroup-internal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/cgroup/cgroup-internal.h b/kernel/cgroup/cgroup-internal.h index c161d34be634..b14e61c64a34 100644 --- a/kernel/cgroup/cgroup-internal.h +++ b/kernel/cgroup/cgroup-internal.h @@ -272,7 +272,7 @@ int cgroup_task_count(const struct cgroup *cgrp); */ int css_rstat_init(struct cgroup_subsys_state *css); void css_rstat_exit(struct cgroup_subsys_state *css); -void cgroup_rstat_boot(void); +int ss_rstat_init(struct cgroup_subsys *ss); void cgroup_base_stat_cputime_show(struct seq_file *seq); /* |