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btrfs: state information for readahead

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Add state information for readahead to btrfs_fs_info and btrfs_device

Changes v2:
 - don't wait in radix_trees
 - add own set of workers for readahead

Reviewed-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Arne Jansen <sensille@gmx.net>
This commit is contained in:
Arne Jansen
2011-05-23 14:30:00 +02:00
parent ab0fff0305
commit 90519d66ab
4 changed files with 31 additions and 0 deletions
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8
fs/btrfs/volumes.h
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@ -92,6 +92,14 @@ struct btrfs_device {
struct btrfs_work work;
struct rcu_head rcu;
struct work_struct rcu_work;
/* readahead state */
spinlock_t reada_lock;
atomic_t reada_in_flight;
u64 reada_next;
struct reada_zone *reada_curr_zone;
struct radix_tree_root reada_zones;
struct radix_tree_root reada_extents;
};
struct btrfs_fs_devices {