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[PATCH 2/5] blk-cgroup: introduce task_to_blkio_cgroup() [message #41816 is a reply to message #41814]

Tue, 22 February 2011 17:12

Andrea Righi
Messages: 65
Registered: May 2008

Member

Introduce a helper function to retrieve a blkio cgroup from a task.

Signed-off-by: Andrea Righi <arighi@develer.com>
---
block/blk-cgroup.c | 7 +++++++
include/linux/blk-cgroup.h | 4 ++++
2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index bf9d354..f283ae1 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -107,6 +107,13 @@ blkio_policy_search_node(const struct blkio_cgroup *blkcg, dev_t dev,
return NULL;
}

+struct blkio_cgroup *task_to_blkio_cgroup(struct task_struct *task)
+{
+ return container_of(task_subsys_state(task, blkio_subsys_id),
+ struct blkio_cgroup, css);
+}
+EXPORT_SYMBOL_GPL(task_to_blkio_cgroup);
+
struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup)
{
return container_of(cgroup_subsys_state(cgroup, blkio_subsys_id),
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 5e48204..41b59db 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -287,6 +287,7 @@ static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg) {}
extern struct blkio_cgroup blkio_root_cgroup;
extern bool blkio_cgroup_disabled(void);
extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);
+extern struct blkio_cgroup *task_to_blkio_cgroup(struct task_struct *task);
extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
struct blkio_group *blkg, void *key, dev_t dev,
enum blkio_policy_id plid);
@@ -311,6 +312,9 @@ static inline bool blkio_cgroup_disabled(void) { return true; }
static inline struct blkio_cgroup *
cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }

+static inline struct blkio_cgroup *
+task_to_blkio_cgroup(struct task_struct *task) { return NULL; }
+
static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
struct blkio_group *blkg, void *key, dev_t dev,
enum blkio_policy_id plid) {}
--
1.7.1

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[Message index]

		[PATCH 0/5] blk-throttle: writeback and swap IO control By: Andrea Righi on Tue, 22 February 2011 17:12
		[PATCH 1/5] blk-cgroup: move blk-cgroup.h in include/linux/blk-cgroup.h By: Andrea Righi on Tue, 22 February 2011 17:12
		[PATCH 2/5] blk-cgroup: introduce task_to_blkio_cgroup() By: Andrea Righi on Tue, 22 February 2011 17:12
		[PATCH 3/5] page_cgroup: make page tracking available for blkio By: Andrea Righi on Tue, 22 February 2011 17:12
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Jonathan Corbet on Tue, 22 February 2011 20:01
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Vivek Goyal on Tue, 22 February 2011 21:57
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Andrea Righi on Tue, 22 February 2011 23:01
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Jonathan Corbet on Tue, 22 February 2011 23:27
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Andrea Righi on Tue, 22 February 2011 23:48
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Vivek Goyal on Tue, 22 February 2011 23:06
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Vivek Goyal on Tue, 22 February 2011 21:22
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Andrea Righi on Tue, 22 February 2011 23:08
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Jonathan Corbet on Tue, 22 February 2011 23:21
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Andrea Righi on Tue, 22 February 2011 23:37
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: KAMEZAWA Hiroyuki on Wed, 23 February 2011 04:49
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: Andrea Righi on Wed, 23 February 2011 08:59
		Re: [PATCH 3/5] page_cgroup: make page tracking available for blkio By: KAMEZAWA Hiroyuki on Wed, 23 February 2011 23:58
		[PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Andrea Righi on Tue, 22 February 2011 17:12
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Andrea Righi on Tue, 22 February 2011 19:12
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Vivek Goyal on Tue, 22 February 2011 20:49
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Andrea Righi on Tue, 22 February 2011 23:03
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Vivek Goyal on Tue, 22 February 2011 21:00
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Andrea Righi on Tue, 22 February 2011 23:05
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Vivek Goyal on Wed, 23 February 2011 00:07
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Andrea Righi on Wed, 23 February 2011 08:37
		Re: [PATCH 4/5] blk-throttle: track buffered and anonymous pages By: Chad Talbott on Tue, 22 February 2011 18:42
		[PATCH 5/5] blk-throttle: buffered and anonymous page tracking instrumentation By: Andrea Righi on Tue, 22 February 2011 17:12
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Vivek Goyal on Tue, 22 February 2011 19:34
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Andrea Righi on Tue, 22 February 2011 22:41
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Vivek Goyal on Wed, 23 February 2011 00:03
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Andrea Righi on Wed, 23 February 2011 08:32
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Vivek Goyal on Wed, 23 February 2011 15:23
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Andrea Righi on Wed, 23 February 2011 23:14
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Vivek Goyal on Thu, 24 February 2011 00:10
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: KAMEZAWA Hiroyuki on Thu, 24 February 2011 00:40
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Greg Thelen on Thu, 24 February 2011 02:01
		Re: [PATCH 0/5] blk-throttle: writeback and swap IO control By: Balbir Singh on Thu, 24 February 2011 06:08

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