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| author | Chris Mason <chris.mason@oracle.com> | 2007-10-15 16:18:55 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2008-09-25 11:03:56 -0400 |
| commit | 810191ff3087e8143b41a944fcf4fd8c693f00e3 (patch) | |
| tree | 9d23dd51458623eaac41bc8c89dd2998a2eda7ae /fs/btrfs/disk-io.c | |
| parent | 3326d1b07c0cb6a2ff5b835b7a2cffa54124d074 (diff) | |
| download | lwn-810191ff3087e8143b41a944fcf4fd8c693f00e3.tar.gz lwn-810191ff3087e8143b41a944fcf4fd8c693f00e3.zip | |
Btrfs: extent_map optimizations to cut down on CPU usage
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index fd7e6c182b9d..16f0260fca66 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -644,20 +644,20 @@ int close_ctree(struct btrfs_root *root) int btrfs_buffer_uptodate(struct extent_buffer *buf) { - struct inode *btree_inode = buf->last_page->mapping->host; + struct inode *btree_inode = buf->first_page->mapping->host; return extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, buf); } int btrfs_set_buffer_uptodate(struct extent_buffer *buf) { - struct inode *btree_inode = buf->last_page->mapping->host; + struct inode *btree_inode = buf->first_page->mapping->host; return set_extent_buffer_uptodate(&BTRFS_I(btree_inode)->extent_tree, buf); } void btrfs_mark_buffer_dirty(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; u64 transid = btrfs_header_generation(buf); struct inode *btree_inode = root->fs_info->btree_inode; @@ -678,7 +678,7 @@ void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr) void btrfs_set_buffer_defrag(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; set_extent_bits(&BTRFS_I(btree_inode)->extent_tree, buf->start, buf->start + buf->len - 1, EXTENT_DEFRAG, GFP_NOFS); @@ -686,7 +686,7 @@ void btrfs_set_buffer_defrag(struct extent_buffer *buf) void btrfs_set_buffer_defrag_done(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; set_extent_bits(&BTRFS_I(btree_inode)->extent_tree, buf->start, buf->start + buf->len - 1, EXTENT_DEFRAG_DONE, @@ -695,7 +695,7 @@ void btrfs_set_buffer_defrag_done(struct extent_buffer *buf) int btrfs_buffer_defrag(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; return test_range_bit(&BTRFS_I(btree_inode)->extent_tree, buf->start, buf->start + buf->len - 1, EXTENT_DEFRAG, 0); @@ -703,7 +703,7 @@ int btrfs_buffer_defrag(struct extent_buffer *buf) int btrfs_buffer_defrag_done(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; return test_range_bit(&BTRFS_I(btree_inode)->extent_tree, buf->start, buf->start + buf->len - 1, @@ -712,7 +712,7 @@ int btrfs_buffer_defrag_done(struct extent_buffer *buf) int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; return clear_extent_bits(&BTRFS_I(btree_inode)->extent_tree, buf->start, buf->start + buf->len - 1, @@ -721,7 +721,7 @@ int btrfs_clear_buffer_defrag_done(struct extent_buffer *buf) int btrfs_clear_buffer_defrag(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; return clear_extent_bits(&BTRFS_I(btree_inode)->extent_tree, buf->start, buf->start + buf->len - 1, @@ -730,7 +730,7 @@ int btrfs_clear_buffer_defrag(struct extent_buffer *buf) int btrfs_read_buffer(struct extent_buffer *buf) { - struct btrfs_root *root = BTRFS_I(buf->last_page->mapping->host)->root; + struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root; struct inode *btree_inode = root->fs_info->btree_inode; return read_extent_buffer_pages(&BTRFS_I(btree_inode)->extent_tree, buf, 1); |