2012-11-20 14:06:43

by Tao Ma

[permalink] [raw]
Subject: [PATCH] cgroup: remove obsolete guarantee from cgroup_task_migrate.

From: Tao Ma <[email protected]>

'guarantee' is already removed from cgroup_task_migrate, so remove
the corresponding comments. Some other typos in cgroup are also
changed.

Cc: Tejun Heo <[email protected]>
Cc: Li Zefan <[email protected]>
Signed-off-by: Tao Ma <[email protected]>
---
include/linux/cgroup.h | 4 ++--
kernel/cgroup.c | 8 +++-----
2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index f8a030c..7508ac0 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -66,7 +66,7 @@ struct cgroup_subsys_state {
/*
* State maintained by the cgroup system to allow subsystems
* to be "busy". Should be accessed via css_get(),
- * css_tryget() and and css_put().
+ * css_tryget() and css_put().
*/

atomic_t refcnt;
@@ -282,7 +282,7 @@ struct cgroup_map_cb {

/* cftype->flags */
#define CFTYPE_ONLY_ON_ROOT (1U << 0) /* only create on root cg */
-#define CFTYPE_NOT_ON_ROOT (1U << 1) /* don't create onp root cg */
+#define CFTYPE_NOT_ON_ROOT (1U << 1) /* don't create on root cg */

#define MAX_CFTYPE_NAME 64

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index a9f8388..46b8f7d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -782,12 +782,12 @@ static struct cgroup *task_cgroup_from_root(struct task_struct *task,
* The task_lock() exception
*
* The need for this exception arises from the action of
- * cgroup_attach_task(), which overwrites one tasks cgroup pointer with
+ * cgroup_attach_task(), which overwrites one task's cgroup pointer with
* another. It does so using cgroup_mutex, however there are
* several performance critical places that need to reference
* task->cgroup without the expense of grabbing a system global
* mutex. Therefore except as noted below, when dereferencing or, as
- * in cgroup_attach_task(), modifying a task'ss cgroup pointer we use
+ * in cgroup_attach_task(), modifying a task's cgroup pointer we use
* task_lock(), which acts on a spinlock (task->alloc_lock) already in
* the task_struct routinely used for such matters.
*
@@ -1930,9 +1930,7 @@ EXPORT_SYMBOL_GPL(cgroup_taskset_size);
/*
* cgroup_task_migrate - move a task from one cgroup to another.
*
- * 'guarantee' is set if the caller promises that a new css_set for the task
- * will already exist. If not set, this function might sleep, and can fail with
- * -ENOMEM. Must be called with cgroup_mutex and threadgroup locked.
+ * Must be called with cgroup_mutex and threadgroup locked.
*/
static void cgroup_task_migrate(struct cgroup *cgrp, struct cgroup *oldcgrp,
struct task_struct *tsk, struct css_set *newcg)
--
1.7.1


2012-11-20 14:45:42

by Tejun Heo

[permalink] [raw]
Subject: Re: [PATCH] cgroup: remove obsolete guarantee from cgroup_task_migrate.

On Tue, Nov 20, 2012 at 10:06:18PM +0800, Tao Ma wrote:
> From: Tao Ma <[email protected]>
>
> 'guarantee' is already removed from cgroup_task_migrate, so remove
> the corresponding comments. Some other typos in cgroup are also
> changed.
>
> Cc: Tejun Heo <[email protected]>
> Cc: Li Zefan <[email protected]>
> Signed-off-by: Tao Ma <[email protected]>

Applied to cgroup/for-3.8.

Thanks!

--
tejun