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| author | Miao Xie <miaox@cn.fujitsu.com> | 2013-05-13 13:55:10 +0000 |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-05-17 21:40:24 -0400 |
| commit | b586b32374909863311b7c916c7c0c709141e35a (patch) | |
| tree | e6df49f7536b100e330a630b10cbc212f2845f83 | |
| parent | 7b61cd92242542944fc27024900c495a6a7b3396 (diff) | |
| download | linux-stable-b586b32374909863311b7c916c7c0c709141e35a.tar.gz linux-stable-b586b32374909863311b7c916c7c0c709141e35a.tar.bz2 linux-stable-b586b32374909863311b7c916c7c0c709141e35a.zip | |
Btrfs: optimize the error handle of use_block_rsv()
cc: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 65 |
1 files changed, 28 insertions, 37 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 162a66bfbffd..5e2c0bf84075 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -6656,48 +6656,39 @@ use_block_rsv(struct btrfs_trans_handle *trans, block_rsv = get_block_rsv(trans, root); - if (block_rsv->size == 0) { - ret = reserve_metadata_bytes(root, block_rsv, blocksize, - BTRFS_RESERVE_NO_FLUSH); - /* - * If we couldn't reserve metadata bytes try and use some from - * the global reserve. - */ - if (ret && block_rsv != global_rsv) { - ret = block_rsv_use_bytes(global_rsv, blocksize); - if (!ret) - return global_rsv; - return ERR_PTR(ret); - } else if (ret) { - return ERR_PTR(ret); - } - return block_rsv; - } + if (unlikely(block_rsv->size == 0)) + goto try_reserve; ret = block_rsv_use_bytes(block_rsv, blocksize); if (!ret) return block_rsv; - if (ret && !block_rsv->failfast) { - if (btrfs_test_opt(root, ENOSPC_DEBUG)) { - static DEFINE_RATELIMIT_STATE(_rs, - DEFAULT_RATELIMIT_INTERVAL * 10, - /*DEFAULT_RATELIMIT_BURST*/ 1); - if (__ratelimit(&_rs)) - WARN(1, KERN_DEBUG - "btrfs: block rsv returned %d\n", ret); - } - ret = reserve_metadata_bytes(root, block_rsv, blocksize, - BTRFS_RESERVE_NO_FLUSH); - if (!ret) { - return block_rsv; - } else if (ret && block_rsv != global_rsv) { - ret = block_rsv_use_bytes(global_rsv, blocksize); - if (!ret) - return global_rsv; - } - } - return ERR_PTR(-ENOSPC); + if (block_rsv->failfast) + return ERR_PTR(ret); + + if (btrfs_test_opt(root, ENOSPC_DEBUG)) { + static DEFINE_RATELIMIT_STATE(_rs, + DEFAULT_RATELIMIT_INTERVAL * 10, + /*DEFAULT_RATELIMIT_BURST*/ 1); + if (__ratelimit(&_rs)) + WARN(1, KERN_DEBUG + "btrfs: block rsv returned %d\n", ret); + } +try_reserve: + ret = reserve_metadata_bytes(root, block_rsv, blocksize, + BTRFS_RESERVE_NO_FLUSH); + if (!ret) + return block_rsv; + /* + * If we couldn't reserve metadata bytes try and use some from + * the global reserve. + */ + if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL) { + ret = block_rsv_use_bytes(global_rsv, blocksize); + if (!ret) + return global_rsv; + } + return ERR_PTR(ret); } static void unuse_block_rsv(struct btrfs_fs_info *fs_info, |