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| author | Arne Jansen | 2011-05-23 14:30:00 +0200 |
|---|---|---|
| committer | Arne Jansen | 2011-10-02 08:48:30 +0200 |
| commit | 90519d66abbccc251d14719ac76f191f70826e40 (patch) | |
| tree | 93cad519db9f4f0c97abd89d405ea1e0fec306a7 /fs/btrfs/volumes.c | |
| parent | btrfs: add READAHEAD extent buffer flag (diff) | |
| download | kernel-qcow2-linux-90519d66abbccc251d14719ac76f191f70826e40.tar.gz kernel-qcow2-linux-90519d66abbccc251d14719ac76f191f70826e40.tar.xz kernel-qcow2-linux-90519d66abbccc251d14719ac76f191f70826e40.zip | |
btrfs: state information for readahead
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>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index f2a4cc79da61..1dccce5bc93d 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -366,6 +366,14 @@ static noinline int device_list_add(const char *path, } INIT_LIST_HEAD(&device->dev_alloc_list); + /* init readahead state */ + spin_lock_init(&device->reada_lock); + device->reada_curr_zone = NULL; + atomic_set(&device->reada_in_flight, 0); + device->reada_next = 0; + INIT_RADIX_TREE(&device->reada_zones, GFP_NOFS & ~__GFP_WAIT); + INIT_RADIX_TREE(&device->reada_extents, GFP_NOFS & ~__GFP_WAIT); + mutex_lock(&fs_devices->device_list_mutex); list_add_rcu(&device->dev_list, &fs_devices->devices); mutex_unlock(&fs_devices->device_list_mutex); |