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-rw-r--r--block/blk-cgroup.c2
-rw-r--r--block/blk-cgroup.h1
-rw-r--r--block/blk-core.c4
-rw-r--r--block/blk-throttle.c49
-rw-r--r--block/cfq-iosched.c47
5 files changed, 49 insertions, 54 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 91f9824be5cc..e940972ccd66 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -499,6 +499,8 @@ static struct blkio_group *blkg_alloc(struct blkio_cgroup *blkcg,
spin_lock_init(&blkg->stats_lock);
rcu_assign_pointer(blkg->q, q);
+ INIT_LIST_HEAD(&blkg->q_node[0]);
+ INIT_LIST_HEAD(&blkg->q_node[1]);
blkg->blkcg = blkcg;
blkg->plid = pol->plid;
blkg->refcnt = 1;
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 60e96b4be4ce..ae96f196d469 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -178,6 +178,7 @@ struct blkg_policy_data {
struct blkio_group {
/* Pointer to the associated request_queue, RCU protected */
struct request_queue __rcu *q;
+ struct list_head q_node[BLKIO_NR_POLICIES];
struct hlist_node blkcg_node;
struct blkio_cgroup *blkcg;
/* Store cgroup path */
diff --git a/block/blk-core.c b/block/blk-core.c
index c3434c6395b9..83a47fcf5946 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -547,6 +547,10 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
INIT_LIST_HEAD(&q->queue_head);
INIT_LIST_HEAD(&q->timeout_list);
INIT_LIST_HEAD(&q->icq_list);
+#ifdef CONFIG_BLK_CGROUP
+ INIT_LIST_HEAD(&q->blkg_list[0]);
+ INIT_LIST_HEAD(&q->blkg_list[1]);
+#endif
INIT_LIST_HEAD(&q->flush_queue[0]);
INIT_LIST_HEAD(&q->flush_queue[1]);
INIT_LIST_HEAD(&q->flush_data_in_flight);
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index b2fddaf20b98..c15d38307e1d 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -41,9 +41,6 @@ struct throtl_rb_root {
#define rb_entry_tg(node) rb_entry((node), struct throtl_grp, rb_node)
struct throtl_grp {
- /* List of throtl groups on the request queue*/
- struct hlist_node tg_node;
-
/* active throtl group service_tree member */
struct rb_node rb_node;
@@ -83,9 +80,6 @@ struct throtl_grp {
struct throtl_data
{
- /* List of throtl groups */
- struct hlist_head tg_list;
-
/* service tree for active throtl groups */
struct throtl_rb_root tg_service_tree;
@@ -152,7 +146,6 @@ static void throtl_init_blkio_group(struct blkio_group *blkg)
{
struct throtl_grp *tg = blkg_to_tg(blkg);
- INIT_HLIST_NODE(&tg->tg_node);
RB_CLEAR_NODE(&tg->rb_node);
bio_list_init(&tg->bio_lists[0]);
bio_list_init(&tg->bio_lists[1]);
@@ -167,11 +160,9 @@ static void throtl_init_blkio_group(struct blkio_group *blkg)
static void throtl_link_blkio_group(struct request_queue *q,
struct blkio_group *blkg)
{
- struct throtl_data *td = q->td;
- struct throtl_grp *tg = blkg_to_tg(blkg);
-
- hlist_add_head(&tg->tg_node, &td->tg_list);
- td->nr_undestroyed_grps++;
+ list_add(&blkg->q_node[BLKIO_POLICY_THROTL],
+ &q->blkg_list[BLKIO_POLICY_THROTL]);
+ q->nr_blkgs[BLKIO_POLICY_THROTL]++;
}
static struct
@@ -711,8 +702,8 @@ static int throtl_select_dispatch(struct throtl_data *td, struct bio_list *bl)
static void throtl_process_limit_change(struct throtl_data *td)
{
- struct throtl_grp *tg;
- struct hlist_node *pos, *n;
+ struct request_queue *q = td->queue;
+ struct blkio_group *blkg, *n;
if (!td->limits_changed)
return;
@@ -721,7 +712,10 @@ static void throtl_process_limit_change(struct throtl_data *td)
throtl_log(td, "limits changed");
- hlist_for_each_entry_safe(tg, pos, n, &td->tg_list, tg_node) {
+ list_for_each_entry_safe(blkg, n, &q->blkg_list[BLKIO_POLICY_THROTL],
+ q_node[BLKIO_POLICY_THROTL]) {
+ struct throtl_grp *tg = blkg_to_tg(blkg);
+
if (!tg->limits_changed)
continue;
@@ -822,26 +816,31 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay)
static void
throtl_destroy_tg(struct throtl_data *td, struct throtl_grp *tg)
{
+ struct blkio_group *blkg = tg_to_blkg(tg);
+
/* Something wrong if we are trying to remove same group twice */
- BUG_ON(hlist_unhashed(&tg->tg_node));
+ WARN_ON_ONCE(list_empty(&blkg->q_node[BLKIO_POLICY_THROTL]));
- hlist_del_init(&tg->tg_node);
+ list_del_init(&blkg->q_node[BLKIO_POLICY_THROTL]);
/*
* Put the reference taken at the time of creation so that when all
* queues are gone, group can be destroyed.
*/
blkg_put(tg_to_blkg(tg));
- td->nr_undestroyed_grps--;
+ td->queue->nr_blkgs[BLKIO_POLICY_THROTL]--;
}
static bool throtl_release_tgs(struct throtl_data *td, bool release_root)
{
- struct hlist_node *pos, *n;
- struct throtl_grp *tg;
+ struct request_queue *q = td->queue;
+ struct blkio_group *blkg, *n;
bool empty = true;
- hlist_for_each_entry_safe(tg, pos, n, &td->tg_list, tg_node) {
+ list_for_each_entry_safe(blkg, n, &q->blkg_list[BLKIO_POLICY_THROTL],
+ q_node[BLKIO_POLICY_THROTL]) {
+ struct throtl_grp *tg = blkg_to_tg(blkg);
+
/* skip root? */
if (!release_root && tg == td->root_tg)
continue;
@@ -851,7 +850,7 @@ static bool throtl_release_tgs(struct throtl_data *td, bool release_root)
* it from cgroup list, then it will take care of destroying
* cfqg also.
*/
- if (!blkiocg_del_blkio_group(tg_to_blkg(tg)))
+ if (!blkiocg_del_blkio_group(blkg))
throtl_destroy_tg(td, tg);
else
empty = false;
@@ -1114,7 +1113,6 @@ int blk_throtl_init(struct request_queue *q)
if (!td)
return -ENOMEM;
- INIT_HLIST_HEAD(&td->tg_list);
td->tg_service_tree = THROTL_RB_ROOT;
td->limits_changed = false;
INIT_DELAYED_WORK(&td->throtl_work, blk_throtl_work);
@@ -1144,7 +1142,7 @@ int blk_throtl_init(struct request_queue *q)
void blk_throtl_exit(struct request_queue *q)
{
struct throtl_data *td = q->td;
- bool wait = false;
+ bool wait;
BUG_ON(!td);
@@ -1154,8 +1152,7 @@ void blk_throtl_exit(struct request_queue *q)
throtl_release_tgs(td, true);
/* If there are other groups */
- if (td->nr_undestroyed_grps > 0)
- wait = true;
+ wait = q->nr_blkgs[BLKIO_POLICY_THROTL];
spin_unlock_irq(q->queue_lock);
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 11dd9d7f2edb..e846803280a6 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -208,9 +208,7 @@ struct cfq_group {
unsigned long saved_workload_slice;
enum wl_type_t saved_workload;
enum wl_prio_t saved_serving_prio;
-#ifdef CONFIG_CFQ_GROUP_IOSCHED
- struct hlist_node cfqd_node;
-#endif
+
/* number of requests that are on the dispatch list or inside driver */
int dispatched;
struct cfq_ttime ttime;
@@ -302,12 +300,6 @@ struct cfq_data {
struct cfq_queue oom_cfqq;
unsigned long last_delayed_sync;
-
- /* List of cfq groups being managed on this device*/
- struct hlist_head cfqg_list;
-
- /* Number of groups which are on blkcg->blkg_list */
- unsigned int nr_blkcg_linked_grps;
};
static inline struct cfq_group *blkg_to_cfqg(struct blkio_group *blkg)
@@ -1056,13 +1048,9 @@ static void cfq_update_blkio_group_weight(struct request_queue *q,
static void cfq_link_blkio_group(struct request_queue *q,
struct blkio_group *blkg)
{
- struct cfq_data *cfqd = q->elevator->elevator_data;
- struct cfq_group *cfqg = blkg_to_cfqg(blkg);
-
- cfqd->nr_blkcg_linked_grps++;
-
- /* Add group on cfqd list */
- hlist_add_head(&cfqg->cfqd_node, &cfqd->cfqg_list);
+ list_add(&blkg->q_node[BLKIO_POLICY_PROP],
+ &q->blkg_list[BLKIO_POLICY_PROP]);
+ q->nr_blkgs[BLKIO_POLICY_PROP]++;
}
static void cfq_init_blkio_group(struct blkio_group *blkg)
@@ -1110,13 +1098,15 @@ static void cfq_link_cfqq_cfqg(struct cfq_queue *cfqq, struct cfq_group *cfqg)
static void cfq_destroy_cfqg(struct cfq_data *cfqd, struct cfq_group *cfqg)
{
+ struct blkio_group *blkg = cfqg_to_blkg(cfqg);
+
/* Something wrong if we are trying to remove same group twice */
- BUG_ON(hlist_unhashed(&cfqg->cfqd_node));
+ BUG_ON(list_empty(&blkg->q_node[BLKIO_POLICY_PROP]));
- hlist_del_init(&cfqg->cfqd_node);
+ list_del_init(&blkg->q_node[BLKIO_POLICY_PROP]);
- BUG_ON(cfqd->nr_blkcg_linked_grps <= 0);
- cfqd->nr_blkcg_linked_grps--;
+ BUG_ON(cfqd->queue->nr_blkgs[BLKIO_POLICY_PROP] <= 0);
+ cfqd->queue->nr_blkgs[BLKIO_POLICY_PROP]--;
/*
* Put the reference taken at the time of creation so that when all
@@ -1127,18 +1117,19 @@ static void cfq_destroy_cfqg(struct cfq_data *cfqd, struct cfq_group *cfqg)
static bool cfq_release_cfq_groups(struct cfq_data *cfqd)
{
- struct hlist_node *pos, *n;
- struct cfq_group *cfqg;
+ struct request_queue *q = cfqd->queue;
+ struct blkio_group *blkg, *n;
bool empty = true;
- hlist_for_each_entry_safe(cfqg, pos, n, &cfqd->cfqg_list, cfqd_node) {
+ list_for_each_entry_safe(blkg, n, &q->blkg_list[BLKIO_POLICY_PROP],
+ q_node[BLKIO_POLICY_PROP]) {
/*
* If cgroup removal path got to blk_group first and removed
* it from cgroup list, then it will take care of destroying
* cfqg also.
*/
- if (!cfq_blkiocg_del_blkio_group(cfqg_to_blkg(cfqg)))
- cfq_destroy_cfqg(cfqd, cfqg);
+ if (!cfq_blkiocg_del_blkio_group(blkg))
+ cfq_destroy_cfqg(cfqd, blkg_to_cfqg(blkg));
else
empty = false;
}
@@ -3558,13 +3549,13 @@ static void cfq_exit_queue(struct elevator_queue *e)
cfq_put_async_queues(cfqd);
cfq_release_cfq_groups(cfqd);
+#ifdef CONFIG_BLK_CGROUP
/*
* If there are groups which we could not unlink from blkcg list,
* wait for a rcu period for them to be freed.
*/
- if (cfqd->nr_blkcg_linked_grps)
- wait = true;
-
+ wait = q->nr_blkgs[BLKIO_POLICY_PROP];
+#endif
spin_unlock_irq(q->queue_lock);
cfq_shutdown_timer_wq(cfqd);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 06:40:39 +0000