The flag will be used in subsequent porting patches for release_agent
functionality
Signed-off-by: Valeriy Vdovin <valeriy.vdo...@virtuozzo.com>
---
include/linux/cgroup-defs.h | 2 ++
include/linux/cgroup.h | 5 +++++
kernel/cgroup/cgroup.c | 1 +
3 files changed, 8 insertions(+)
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index a3b309ab1a90..5ee5f10e3de7 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -57,6 +57,8 @@ enum {
/* bits in struct cgroup flags field */
enum {
+ /* Control Cgroup is dead */
+ CGRP_REMOVED,
/* Control Group requires release notifications to userspace */
CGRP_NOTIFY_ON_RELEASE,
/*
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index c0a42c3d43fa..dfd9460986ee 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -922,6 +922,11 @@ static inline bool cgroup_task_frozen(struct task_struct
*task)
return task->frozen;
}
+static inline int cgroup_is_removed(const struct cgroup *cgrp)
+{
+ return test_bit(CGRP_REMOVED, &cgrp->flags);
+}
+
#else /* !CONFIG_CGROUPS */
static inline void cgroup_enter_frozen(void) { }
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 797a3971ab46..447c8f003496 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5562,6 +5562,7 @@ static int cgroup_destroy_locked(struct cgroup *cgrp)
tcgrp->freezer.nr_frozen_descendants--;
}
spin_unlock_irq(&css_set_lock);
+ set_bit(CGRP_REMOVED, &cgrp->flags);
cgroup1_check_for_release(parent);
--
2.27.0
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