diff options
Diffstat (limited to 'kernel/cgroup/freezer.c')
| -rw-r--r-- | kernel/cgroup/freezer.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/kernel/cgroup/freezer.c b/kernel/cgroup/freezer.c index bf1690a167dd..6c18854bff34 100644 --- a/kernel/cgroup/freezer.c +++ b/kernel/cgroup/freezer.c @@ -171,7 +171,7 @@ static void cgroup_freeze_task(struct task_struct *task, bool freeze) /* * Freeze or unfreeze all tasks in the given cgroup. */ -static void cgroup_do_freeze(struct cgroup *cgrp, bool freeze) +static void cgroup_do_freeze(struct cgroup *cgrp, bool freeze, u64 ts_nsec) { struct css_task_iter it; struct task_struct *task; @@ -179,10 +179,16 @@ static void cgroup_do_freeze(struct cgroup *cgrp, bool freeze) lockdep_assert_held(&cgroup_mutex); spin_lock_irq(&css_set_lock); - if (freeze) + write_seqcount_begin(&cgrp->freezer.freeze_seq); + if (freeze) { set_bit(CGRP_FREEZE, &cgrp->flags); - else + cgrp->freezer.freeze_start_nsec = ts_nsec; + } else { clear_bit(CGRP_FREEZE, &cgrp->flags); + cgrp->freezer.frozen_nsec += (ts_nsec - + cgrp->freezer.freeze_start_nsec); + } + write_seqcount_end(&cgrp->freezer.freeze_seq); spin_unlock_irq(&css_set_lock); if (freeze) @@ -260,6 +266,7 @@ void cgroup_freeze(struct cgroup *cgrp, bool freeze) struct cgroup *parent; struct cgroup *dsct; bool applied = false; + u64 ts_nsec; bool old_e; lockdep_assert_held(&cgroup_mutex); @@ -271,6 +278,7 @@ void cgroup_freeze(struct cgroup *cgrp, bool freeze) return; cgrp->freezer.freeze = freeze; + ts_nsec = ktime_get_ns(); /* * Propagate changes downwards the cgroup tree. @@ -298,7 +306,7 @@ void cgroup_freeze(struct cgroup *cgrp, bool freeze) /* * Do change actual state: freeze or unfreeze. */ - cgroup_do_freeze(dsct, freeze); + cgroup_do_freeze(dsct, freeze, ts_nsec); applied = true; } |