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| author | Miao Xie <miaox@cn.fujitsu.com> | 2013-11-04 23:13:20 +0800 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2013-11-11 22:13:07 -0500 |
| commit | d3ee29e39653455b7d799f77872d7df8c4060613 (patch) | |
| tree | 57621b00855465df0cedfda92b45d9aee323cdfc /fs/btrfs | |
| parent | 3b7a016f44d51ba8425c244f4c607f93fa213fd2 (diff) | |
| download | linux-d3ee29e39653455b7d799f77872d7df8c4060613.tar.gz | |
Btrfs: remove unnecessary initialization and memory barrior in shrink_delalloc()
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index fb5c76795eda..5e0e6bcf67b9 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4034,15 +4034,14 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, u64 delalloc_bytes; u64 max_reclaim; long time_left; - unsigned long nr_pages = (2 * 1024 * 1024) >> PAGE_CACHE_SHIFT; - int loops = 0; + unsigned long nr_pages; + int loops; enum btrfs_reserve_flush_enum flush; trans = (struct btrfs_trans_handle *)current->journal_info; block_rsv = &root->fs_info->delalloc_block_rsv; space_info = block_rsv->space_info; - smp_mb(); delalloc_bytes = percpu_counter_sum_positive( &root->fs_info->delalloc_bytes); if (delalloc_bytes == 0) { @@ -4052,6 +4051,7 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, return; } + loops = 0; while (delalloc_bytes && loops < 3) { max_reclaim = min(delalloc_bytes, to_reclaim); nr_pages = max_reclaim >> PAGE_CACHE_SHIFT; @@ -4082,7 +4082,6 @@ static void shrink_delalloc(struct btrfs_root *root, u64 to_reclaim, u64 orig, if (time_left) break; } - smp_mb(); delalloc_bytes = percpu_counter_sum_positive( &root->fs_info->delalloc_bytes); } |