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Btrfs: remove the unnecessary flush when preparing the pages

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Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
This commit is contained in:
Miao Xie 2014-03-06 13:54:58 +08:00 committed by Josef Bacik
parent 41bd9ca459
commit b88935bf98
1 changed files with 5 additions and 8 deletions
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13
fs/btrfs/file.c
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@ -1360,11 +1360,11 @@ lock_and_cleanup_extent_if_need(struct inode *inode, struct page **pages,
struct btrfs_ordered_extent *ordered; struct btrfs_ordered_extent *ordered;
lock_extent_bits(&BTRFS_I(inode)->io_tree, lock_extent_bits(&BTRFS_I(inode)->io_tree,
start_pos, last_pos, 0, cached_state); start_pos, last_pos, 0, cached_state);
ordered = btrfs_lookup_first_ordered_extent(inode, last_pos); ordered = btrfs_lookup_ordered_range(inode, start_pos,
last_pos - start_pos + 1);
if (ordered && if (ordered &&
ordered->file_offset + ordered->len > start_pos && ordered->file_offset + ordered->len > start_pos &&
ordered->file_offset <= last_pos) { ordered->file_offset <= last_pos) {
btrfs_put_ordered_extent(ordered);
unlock_extent_cached(&BTRFS_I(inode)->io_tree, unlock_extent_cached(&BTRFS_I(inode)->io_tree,
start_pos, last_pos, start_pos, last_pos,
cached_state, GFP_NOFS); cached_state, GFP_NOFS);
@ -1372,12 +1372,9 @@ lock_and_cleanup_extent_if_need(struct inode *inode, struct page **pages,
unlock_page(pages[i]); unlock_page(pages[i]);
page_cache_release(pages[i]); page_cache_release(pages[i]);
} }
ret = btrfs_wait_ordered_range(inode, start_pos, btrfs_start_ordered_extent(inode, ordered, 1);
last_pos - start_pos + 1); btrfs_put_ordered_extent(ordered);
if (ret) return -EAGAIN;
return ret;
else
return -EAGAIN;
} }
if (ordered) if (ordered)
btrfs_put_ordered_extent(ordered); btrfs_put_ordered_extent(ordered);