diff options
Diffstat (limited to 'kernel/cgroup/freezer.c')
| -rw-r--r-- | kernel/cgroup/freezer.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/kernel/cgroup/freezer.c b/kernel/cgroup/freezer.c index 9d8cda478fc9..3bfbb3c8baf3 100644 --- a/kernel/cgroup/freezer.c +++ b/kernel/cgroup/freezer.c @@ -6,6 +6,8 @@ #include "cgroup-internal.h" +#include <trace/events/cgroup.h> + /* * Propagate the cgroup frozen state upwards by the cgroup tree. */ @@ -28,6 +30,7 @@ static void cgroup_propagate_frozen(struct cgroup *cgrp, bool frozen) cgrp->nr_descendants) { set_bit(CGRP_FROZEN, &cgrp->flags); cgroup_file_notify(&cgrp->events_file); + TRACE_CGROUP_PATH(notify_frozen, cgrp, 1); desc++; } } else { @@ -35,6 +38,7 @@ static void cgroup_propagate_frozen(struct cgroup *cgrp, bool frozen) if (test_bit(CGRP_FROZEN, &cgrp->flags)) { clear_bit(CGRP_FROZEN, &cgrp->flags); cgroup_file_notify(&cgrp->events_file); + TRACE_CGROUP_PATH(notify_frozen, cgrp, 0); desc++; } } @@ -73,6 +77,7 @@ void cgroup_update_frozen(struct cgroup *cgrp) clear_bit(CGRP_FROZEN, &cgrp->flags); } cgroup_file_notify(&cgrp->events_file); + TRACE_CGROUP_PATH(notify_frozen, cgrp, frozen); /* Update the state of ancestor cgroups. */ cgroup_propagate_frozen(cgrp, frozen); @@ -189,6 +194,11 @@ static void cgroup_do_freeze(struct cgroup *cgrp, bool freeze) clear_bit(CGRP_FREEZE, &cgrp->flags); spin_unlock_irq(&css_set_lock); + if (freeze) + TRACE_CGROUP_PATH(freeze, cgrp); + else + TRACE_CGROUP_PATH(unfreeze, cgrp); + css_task_iter_start(&cgrp->self, 0, &it); while ((task = css_task_iter_next(&it))) { /* @@ -312,6 +322,9 @@ void cgroup_freeze(struct cgroup *cgrp, bool freeze) * In both cases it's better to notify a user, that there is * nothing to wait for. */ - if (!applied) + if (!applied) { + TRACE_CGROUP_PATH(notify_frozen, cgrp, + test_bit(CGRP_FROZEN, &cgrp->flags)); cgroup_file_notify(&cgrp->events_file); + } } |