diff options
| -rw-r--r-- | include/linux/misc_cgroup.h | 5 | ||||
| -rw-r--r-- | kernel/cgroup/misc.c | 24 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/misc_cgroup.h b/include/linux/misc_cgroup.h index da2367e2ac1e..091f2d2a1aec 100644 --- a/include/linux/misc_cgroup.h +++ b/include/linux/misc_cgroup.h @@ -36,6 +36,7 @@ struct misc_cg; struct misc_res { unsigned long max; atomic_long_t usage; + atomic_long_t events; bool failed; }; @@ -46,6 +47,10 @@ struct misc_res { */ struct misc_cg { struct cgroup_subsys_state css; + + /* misc.events */ + struct cgroup_file events_file; + struct misc_res res[MISC_CG_RES_TYPES]; }; diff --git a/kernel/cgroup/misc.c b/kernel/cgroup/misc.c index ec02d963cad1..4b2b49267384 100644 --- a/kernel/cgroup/misc.c +++ b/kernel/cgroup/misc.c @@ -171,6 +171,11 @@ int misc_cg_try_charge(enum misc_res_type type, struct misc_cg *cg, return 0; err_charge: + for (j = i; j; j = parent_misc(j)) { + atomic_long_inc(&j->res[type].events); + cgroup_file_notify(&j->events_file); + } + for (j = cg; j != i; j = parent_misc(j)) misc_cg_cancel_charge(type, j, amount); misc_cg_cancel_charge(type, i, amount); @@ -335,6 +340,19 @@ static int misc_cg_capacity_show(struct seq_file *sf, void *v) return 0; } +static int misc_events_show(struct seq_file *sf, void *v) +{ + struct misc_cg *cg = css_misc(seq_css(sf)); + unsigned long events, i; + + for (i = 0; i < MISC_CG_RES_TYPES; i++) { + events = atomic_long_read(&cg->res[i].events); + if (READ_ONCE(misc_res_capacity[i]) || events) + seq_printf(sf, "%s.max %lu\n", misc_res_name[i], events); + } + return 0; +} + /* Misc cgroup interface files */ static struct cftype misc_cg_files[] = { { @@ -353,6 +371,12 @@ static struct cftype misc_cg_files[] = { .seq_show = misc_cg_capacity_show, .flags = CFTYPE_ONLY_ON_ROOT, }, + { + .name = "events", + .flags = CFTYPE_NOT_ON_ROOT, + .file_offset = offsetof(struct misc_cg, events_file), + .seq_show = misc_events_show, + }, {} }; |