diff options
| -rw-r--r-- | Documentation/cgroups/cgroups.txt | 4 | ||||
| -rw-r--r-- | include/linux/cgroup-defs.h | 1 | ||||
| -rw-r--r-- | kernel/cgroup.c | 7 | ||||
| -rw-r--r-- | kernel/cgroup_pids.c | 4 |
4 files changed, 14 insertions, 2 deletions
diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt index f935fac1e73b..c6256ae9885b 100644 --- a/Documentation/cgroups/cgroups.txt +++ b/Documentation/cgroups/cgroups.txt @@ -637,6 +637,10 @@ void exit(struct task_struct *task) Called during task exit. +void free(struct task_struct *task) + +Called when the task_struct is freed. + void bind(struct cgroup *root) (cgroup_mutex held by caller) diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h index 6a1ab64ee5f9..60d44b26276d 100644 --- a/include/linux/cgroup-defs.h +++ b/include/linux/cgroup-defs.h @@ -436,6 +436,7 @@ struct cgroup_subsys { void (*cancel_fork)(struct task_struct *task, void *priv); void (*fork)(struct task_struct *task, void *priv); void (*exit)(struct task_struct *task); + void (*free)(struct task_struct *task); void (*bind)(struct cgroup_subsys_state *root_css); int early_init; diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 918658497625..867384369669 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -206,6 +206,7 @@ static u64 css_serial_nr_next = 1; */ static unsigned long have_fork_callback __read_mostly; static unsigned long have_exit_callback __read_mostly; +static unsigned long have_free_callback __read_mostly; /* Ditto for the can_fork callback. */ static unsigned long have_canfork_callback __read_mostly; @@ -5180,6 +5181,7 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss, bool early) have_fork_callback |= (bool)ss->fork << ss->id; have_exit_callback |= (bool)ss->exit << ss->id; + have_free_callback |= (bool)ss->free << ss->id; have_canfork_callback |= (bool)ss->can_fork << ss->id; /* At system boot, before all subsystems have been @@ -5637,6 +5639,11 @@ void cgroup_exit(struct task_struct *tsk) void cgroup_free(struct task_struct *task) { struct css_set *cset = task_css_set(task); + struct cgroup_subsys *ss; + int ssid; + + for_each_subsys_which(ss, ssid, &have_free_callback) + ss->free(task); put_css_set(cset); } diff --git a/kernel/cgroup_pids.c b/kernel/cgroup_pids.c index 45f0856a61fe..cdd8df4e991c 100644 --- a/kernel/cgroup_pids.c +++ b/kernel/cgroup_pids.c @@ -266,7 +266,7 @@ static void pids_fork(struct task_struct *task, void *priv) css_put(old_css); } -static void pids_exit(struct task_struct *task) +static void pids_free(struct task_struct *task) { struct pids_cgroup *pids = css_pids(task_css(task, pids_cgrp_id)); @@ -347,7 +347,7 @@ struct cgroup_subsys pids_cgrp_subsys = { .can_fork = pids_can_fork, .cancel_fork = pids_cancel_fork, .fork = pids_fork, - .exit = pids_exit, + .free = pids_free, .legacy_cftypes = pids_files, .dfl_cftypes = pids_files, }; |