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| author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-16 10:46:25 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-05-25 10:34:50 -0400 |
| commit | f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8 (patch) | |
| tree | 509428ef400ef45e875a3c448b63b86cbea36aea /fs/btrfs/transaction.c | |
| parent | 2ead6ae770d9f9dec9f4286bf0fd9001b4388c4b (diff) | |
| download | lwn-f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8.tar.gz lwn-f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8.zip | |
Btrfs: Introduce contexts for metadata reservation
Introducing metadata reseravtion contexts has two major advantages.
First, it makes metadata reseravtion more traceable. Second, it can
reclaim freed space and re-add them to the itself after transaction
committed.
Besides add btrfs_block_rsv structure and related helper functions,
This patch contains following changes:
Move code that decides if freed tree block should be pinned into
btrfs_free_tree_block().
Make space accounting more accurate, mainly for handling read only
block groups.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/transaction.c')
| -rw-r--r-- | fs/btrfs/transaction.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 2cb116099b90..21ad37c05199 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -185,9 +185,8 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root, h->blocks_reserved = num_blocks; h->blocks_used = 0; h->block_group = 0; - h->alloc_exclude_nr = 0; - h->alloc_exclude_start = 0; h->delayed_ref_updates = 0; + h->block_rsv = NULL; if (!current->journal_info && type != TRANS_USERSPACE) current->journal_info = h; |