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Add a min size parameter to btrfs_alloc_extent

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On huge machines, delayed allocation may try to allocate massive extents.
This change allows btrfs_alloc_extent to return something smaller than
the caller asked for, and the data allocation routines will loop over
the allocations until it fills the whole delayed alloc.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-04-14 09:46:10 -04:00
parent 73f61b2a64
commit 98d20f67cf
3 changed files with 13 additions and 4 deletions
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3
fs/btrfs/ctree.h
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@@ -1286,7 +1286,8 @@ int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans,
u64 owner, u64 owner_offset);
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 num_bytes, u64 root_objectid, u64 ref_generation,
u64 num_bytes, u64 min_bytes,
u64 root_objectid, u64 ref_generation,
u64 owner, u64 owner_offset,
u64 empty_size, u64 hint_byte,
u64 search_end, struct btrfs_key *ins, int data);