From a696ccac5a53620d1652b10218a7f62647a2c501 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Wed, 17 Jan 2018 15:39:39 +0100 Subject: [PATCH] cgroup: when querying the number of tasks in the root slice use the pid_max sysctl The root cgroup doesn't expose and properties in the "pids" cgroup controller, hence we need to get the data from somewhere else. --- src/core/cgroup.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/src/core/cgroup.c b/src/core/cgroup.c index 2e70aa79a..153a0dda8 100644 --- a/src/core/cgroup.c +++ b/src/core/cgroup.c @@ -32,6 +32,7 @@ #include "parse-util.h" #include "path-util.h" #include "process-util.h" +//#include "procfs-util.h" //#include "special.h" #include "stdio-util.h" #include "string-table.h" @@ -2330,6 +2331,10 @@ int unit_get_tasks_current(Unit *u, uint64_t *ret) { if ((u->cgroup_realized_mask & CGROUP_MASK_PIDS) == 0) return -ENODATA; + /* The root cgroup doesn't expose this information, let's get it from /proc instead */ + if (unit_has_root_cgroup(u)) + return procfs_tasks_get_current(ret); + r = cg_get_attribute("pids", u->cgroup_path, "pids.current", &v); if (r == -ENOENT) return -ENODATA; -- 2.30.2