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Btrfs: Add BH_Defrag to mark buffers that are in need of defragging

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This allows the tree walking code to defrag only the newly allocated
buffers, it seems to be a good balance between perfect defragging and the
performance hit of repeatedly reallocating blocks.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-08-10 14:42:37 -04:00
committed by David Woodhouse
parent e9d0b13b5b
commit f2183bde1a
4 changed files with 18 additions and 11 deletions
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2
fs/btrfs/disk-io.h
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@@ -25,8 +25,10 @@
enum btrfs_bh_state_bits {
BH_Checked = BH_PrivateStart,
BH_Defrag,
};
BUFFER_FNS(Checked, checked);
BUFFER_FNS(Defrag, defrag);
static inline struct btrfs_node *btrfs_buffer_node(struct buffer_head *bh)
{