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Btrfs: Change btrfs_truncate_inode_items to stop when it hits the inode

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btrfs_truncate_inode_items is setup to stop doing btree searches when
it has finished removing the items for the inode.  It used to detect the
end of the inode by looking for an objectid that didn't match the
one we were searching for.

But, this would result in an extra search through the btree, which
adds extra balancing and cow costs to the operation.

This commit adds a check to see if we found the inode item, which means
we can stop searching early.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2009-02-04 09:30:58 -05:00
parent f03d9301f1
commit 06d9a8d7c2
1 changed files with 5 additions and 1 deletions
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6
fs/btrfs/inode.c
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@ -2504,7 +2504,7 @@ noinline int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_path *path;
struct btrfs_key key;
struct btrfs_key found_key;
u32 found_type;
u32 found_type = (u8)-1;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
u64 extent_start = 0;
@ -2691,6 +2691,8 @@ next:
if (pending_del_nr)
goto del_pending;
btrfs_release_path(root, path);
if (found_type == BTRFS_INODE_ITEM_KEY)
break;
goto search_again;
}
@ -2707,6 +2709,8 @@ del_pending:
BUG_ON(ret);
pending_del_nr = 0;
btrfs_release_path(root, path);
if (found_type == BTRFS_INODE_ITEM_KEY)
break;
goto search_again;
}
}