The behavior of btrfs_delalloc_reserve_metadata depends on whether
the inode we are allocating for is the freespace inode or not. As it
stands if we are the free node we set 'flush' and 'delalloc_lock'
variable to certain values. Subsequently we check the values of those
vars and act accordingly. Instead, simplify things by having 1 if
which checks whether we are the freespace inode or not and do any
specific operation in either branches of that if. This makes the code
a bit easier to understand, as an added bonus it also shrinks the
compiled size:
add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-17 (-17)
Function old new delta
btrfs_delalloc_reserve_metadata 1876 1859 -17
Total: Before=85966, After=85949, chg -0.02%
No functional changes.
Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
---
fs/btrfs/extent-tree.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 8d51e4bb67c1..47295804d91d 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -6062,19 +6062,19 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes)
* If we have a transaction open (can happen if we call truncate_block
* from truncate), then we need FLUSH_LIMIT so we don't deadlock.
*/
+
if (btrfs_is_free_space_inode(inode)) {
flush = BTRFS_RESERVE_NO_FLUSH;
delalloc_lock = false;
- } else if (current->journal_info) {
- flush = BTRFS_RESERVE_FLUSH_LIMIT;
- }
+ } else {
+ if (current->journal_info)
+ flush = BTRFS_RESERVE_FLUSH_LIMIT;
- if (flush != BTRFS_RESERVE_NO_FLUSH &&
- btrfs_transaction_in_commit(fs_info))
- schedule_timeout(1);
+ if (btrfs_transaction_in_commit(fs_info))
+ schedule_timeout(1);
- if (delalloc_lock)
mutex_lock(&inode->delalloc_mutex);
+ }
num_bytes = ALIGN(num_bytes, fs_info->sectorsize);
--
2.7.4
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