Btrfs: serialize flushers in reserve_metadata_bytes

[pandora-kernel.git] / block / blk-cgroup.h

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index ea4861b..c774930 100644 (file)
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -49,6 +49,8 @@ enum stat_type {
        /* All the single valued stats go below this */
        BLKIO_STAT_TIME,
        BLKIO_STAT_SECTORS,
+       /* Time not charged to this cgroup */
+       BLKIO_STAT_UNACCOUNTED_TIME,
 #ifdef CONFIG_DEBUG_BLK_CGROUP
        BLKIO_STAT_AVG_QUEUE_SIZE,
        BLKIO_STAT_IDLE_TIME,
@@ -81,6 +83,7 @@ enum blkcg_file_name_prop {
        BLKIO_PROP_io_serviced,
        BLKIO_PROP_time,
        BLKIO_PROP_sectors,
+       BLKIO_PROP_unaccounted_time,
        BLKIO_PROP_io_service_time,
        BLKIO_PROP_io_wait_time,
        BLKIO_PROP_io_merged,
@@ -114,6 +117,8 @@ struct blkio_group_stats {
        /* total disk time and nr sectors dispatched by this group */
        uint64_t time;
        uint64_t sectors;
+       /* Time not charged to this cgroup */
+       uint64_t unaccounted_time;
        uint64_t stat_arr[BLKIO_STAT_QUEUED + 1][BLKIO_STAT_TOTAL];
 #ifdef CONFIG_DEBUG_BLK_CGROUP
        /* Sum of number of IOs queued across all samples */
@@ -240,7 +245,7 @@ static inline char *blkg_path(struct blkio_group *blkg) { return NULL; }
 
 #endif
 
-#define BLKIO_WEIGHT_MIN       100
+#define BLKIO_WEIGHT_MIN       10
 #define BLKIO_WEIGHT_MAX       1000
 #define BLKIO_WEIGHT_DEFAULT   500
 
@@ -286,6 +291,7 @@ static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg) {}
 #if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
 extern struct blkio_cgroup blkio_root_cgroup;
 extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);
+extern struct blkio_cgroup *task_blkio_cgroup(struct task_struct *tsk);
 extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
        struct blkio_group *blkg, void *key, dev_t dev,
        enum blkio_policy_id plid);
@@ -293,7 +299,8 @@ extern int blkiocg_del_blkio_group(struct blkio_group *blkg);
 extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg,
                                                void *key);
 void blkiocg_update_timeslice_used(struct blkio_group *blkg,
-                                       unsigned long time);
+                                       unsigned long time,
+                                       unsigned long unaccounted_time);
 void blkiocg_update_dispatch_stats(struct blkio_group *blkg, uint64_t bytes,
                                                bool direction, bool sync);
 void blkiocg_update_completion_stats(struct blkio_group *blkg,
@@ -308,6 +315,8 @@ void blkiocg_update_io_remove_stats(struct blkio_group *blkg,
 struct cgroup;
 static inline struct blkio_cgroup *
 cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }
+static inline struct blkio_cgroup *
+task_blkio_cgroup(struct task_struct *tsk) { return NULL; }
 
 static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
                struct blkio_group *blkg, void *key, dev_t dev,
@@ -319,7 +328,9 @@ blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; }
 static inline struct blkio_group *
 blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) { return NULL; }
 static inline void blkiocg_update_timeslice_used(struct blkio_group *blkg,
-                                               unsigned long time) {}
+                                               unsigned long time,
+                                               unsigned long unaccounted_time)
+{}
 static inline void blkiocg_update_dispatch_stats(struct blkio_group *blkg,
                                uint64_t bytes, bool direction, bool sync) {}
 static inline void blkiocg_update_completion_stats(struct blkio_group *blkg,