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Btrfs: Allocator improvements

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Reduce CPU time searching for free blocks by optimizing find_first_extent_bit

Fix find_free_extent to make better use of the last_alloc hint.  Before it
was often finding blocks just before the hint.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-02-18 12:12:38 -05:00
parent 9afbb0b752
commit d7fc640e6f
4 changed files with 70 additions and 15 deletions
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2
fs/btrfs/disk-io.c
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@ -951,7 +951,7 @@ void btrfs_throttle(struct btrfs_root *root)
void btrfs_btree_balance_dirty(struct btrfs_root *root, unsigned long nr)
{
balance_dirty_pages_ratelimited_nr(
root->fs_info->btree_inode->i_mapping, 1);
root->fs_info->btree_inode->i_mapping, 1);
}
void btrfs_set_buffer_defrag(struct extent_buffer *buf)