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| author | Arne Jansen <sensille@gmx.net> | 2011-05-23 14:30:00 +0200 |
|---|---|---|
| committer | Arne Jansen <sensille@gmx.net> | 2011-10-02 08:48:30 +0200 |
| commit | 90519d66abbccc251d14719ac76f191f70826e40 (patch) | |
| tree | 93cad519db9f4f0c97abd89d405ea1e0fec306a7 /fs/btrfs/disk-io.c | |
| parent | btrfs: add READAHEAD extent buffer flag (diff) | |
| download | linux-90519d66abbccc251d14719ac76f191f70826e40.tar.xz 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/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 1220d04072c8..fd28c40e9ec3 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1711,6 +1711,10 @@ struct btrfs_root *open_ctree(struct super_block *sb, fs_info->defrag_inodes = RB_ROOT; fs_info->trans_no_join = 0; + /* readahead state */ + INIT_RADIX_TREE(&fs_info->reada_tree, GFP_NOFS & ~__GFP_WAIT); + spin_lock_init(&fs_info->reada_lock); + fs_info->thread_pool_size = min_t(unsigned long, num_online_cpus() + 2, 8); @@ -1903,6 +1907,9 @@ struct btrfs_root *open_ctree(struct super_block *sb, btrfs_init_workers(&fs_info->delayed_workers, "delayed-meta", fs_info->thread_pool_size, &fs_info->generic_worker); + btrfs_init_workers(&fs_info->readahead_workers, "readahead", + fs_info->thread_pool_size, + &fs_info->generic_worker); /* * endios are largely parallel and should have a very @@ -1913,6 +1920,7 @@ struct btrfs_root *open_ctree(struct super_block *sb, fs_info->endio_write_workers.idle_thresh = 2; fs_info->endio_meta_write_workers.idle_thresh = 2; + fs_info->readahead_workers.idle_thresh = 2; btrfs_start_workers(&fs_info->workers, 1); btrfs_start_workers(&fs_info->generic_worker, 1); @@ -1926,6 +1934,7 @@ struct btrfs_root *open_ctree(struct super_block *sb, btrfs_start_workers(&fs_info->endio_freespace_worker, 1); btrfs_start_workers(&fs_info->delayed_workers, 1); btrfs_start_workers(&fs_info->caching_workers, 1); + btrfs_start_workers(&fs_info->readahead_workers, 1); fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super); fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages, @@ -2650,6 +2659,7 @@ int close_ctree(struct btrfs_root *root) btrfs_stop_workers(&fs_info->submit_workers); btrfs_stop_workers(&fs_info->delayed_workers); btrfs_stop_workers(&fs_info->caching_workers); + btrfs_stop_workers(&fs_info->readahead_workers); btrfs_close_devices(fs_info->fs_devices); btrfs_mapping_tree_free(&fs_info->mapping_tree); |