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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-09-24 15:12:57 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-25 18:08:26 +0200 |
| commit | cf137307cd9827495b65e7d74ea2b610daa9898b (patch) | |
| tree | 231053bd1730527ea91133ed923756c67739e71d | |
| parent | 5c03449d34debca0deab58046377e1175c1bcd7e (diff) | |
| download | linux-cf137307cd9827495b65e7d74ea2b610daa9898b.tar.bz2 | |
writeback: don't resort for a single super_block in move_expired_inodes()
If we only moved inodes from a single super_block to the temporary
list, there's no point in doing a resort for multiple super_blocks.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| -rw-r--r-- | fs/fs-writeback.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index b27406d51bc7..225c7316344e 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -336,17 +336,27 @@ static void move_expired_inodes(struct list_head *delaying_queue, { LIST_HEAD(tmp); struct list_head *pos, *node; - struct super_block *sb; + struct super_block *sb = NULL; struct inode *inode; + int do_sb_sort = 0; while (!list_empty(delaying_queue)) { inode = list_entry(delaying_queue->prev, struct inode, i_list); if (older_than_this && inode_dirtied_after(inode, *older_than_this)) break; + if (sb && sb != inode->i_sb) + do_sb_sort = 1; + sb = inode->i_sb; list_move(&inode->i_list, &tmp); } + /* just one sb in list, splice to dispatch_queue and we're done */ + if (!do_sb_sort) { + list_splice(&tmp, dispatch_queue); + return; + } + /* Move inodes from one superblock together */ while (!list_empty(&tmp)) { inode = list_entry(tmp.prev, struct inode, i_list); |