ext4: move work from io_end to inode
It does not make much sense to have struct work in ext4_io_end_t
because we always use it for only one ext4_io_end_t per inode (the
first one in the i_completed_io list). So just move the structure to
inode itself. This also allows for a small simplification in
processing io_end structures.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 05795f1..a029017 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -151,16 +151,13 @@
wq = EXT4_SB(io_end->inode->i_sb)->dio_unwritten_wq;
spin_lock_irqsave(&ei->i_completed_io_lock, flags);
- if (list_empty(&ei->i_completed_io_list)) {
- io_end->flag |= EXT4_IO_END_QUEUED;
- queue_work(wq, &io_end->work);
- }
+ if (list_empty(&ei->i_completed_io_list))
+ queue_work(wq, &ei->i_unwritten_work);
list_add_tail(&io_end->list, &ei->i_completed_io_list);
spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
}
-static int ext4_do_flush_completed_IO(struct inode *inode,
- ext4_io_end_t *work_io)
+static int ext4_do_flush_completed_IO(struct inode *inode)
{
ext4_io_end_t *io;
struct list_head unwritten, complete, to_free;
@@ -191,19 +188,7 @@
while (!list_empty(&complete)) {
io = list_entry(complete.next, ext4_io_end_t, list);
io->flag &= ~EXT4_IO_END_UNWRITTEN;
- /* end_io context can not be destroyed now because it still
- * used by queued worker. Worker thread will destroy it later */
- if (io->flag & EXT4_IO_END_QUEUED)
- list_del_init(&io->list);
- else
- list_move(&io->list, &to_free);
- }
- /* If we are called from worker context, it is time to clear queued
- * flag, and destroy it's end_io if it was converted already */
- if (work_io) {
- work_io->flag &= ~EXT4_IO_END_QUEUED;
- if (!(work_io->flag & EXT4_IO_END_UNWRITTEN))
- list_add_tail(&work_io->list, &to_free);
+ list_move(&io->list, &to_free);
}
spin_unlock_irqrestore(&ei->i_completed_io_lock, flags);
@@ -218,10 +203,11 @@
/*
* work on completed aio dio IO, to convert unwritten extents to extents
*/
-static void ext4_end_io_work(struct work_struct *work)
+void ext4_end_io_work(struct work_struct *work)
{
- ext4_io_end_t *io = container_of(work, ext4_io_end_t, work);
- ext4_do_flush_completed_IO(io->inode, io);
+ struct ext4_inode_info *ei = container_of(work, struct ext4_inode_info,
+ i_unwritten_work);
+ ext4_do_flush_completed_IO(&ei->vfs_inode);
}
int ext4_flush_unwritten_io(struct inode *inode)
@@ -229,7 +215,7 @@
int ret;
WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex) &&
!(inode->i_state & I_FREEING));
- ret = ext4_do_flush_completed_IO(inode, NULL);
+ ret = ext4_do_flush_completed_IO(inode);
ext4_unwritten_wait(inode);
return ret;
}
@@ -240,7 +226,6 @@
if (io) {
atomic_inc(&EXT4_I(inode)->i_ioend_count);
io->inode = inode;
- INIT_WORK(&io->work, ext4_end_io_work);
INIT_LIST_HEAD(&io->list);
}
return io;