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ext4: ext4_inode_info diet

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Generic inode has unused i_private pointer which may be used as cur_aio_dio
storage.

TODO: If cur_aio_dio will be passed as an argument to get_block_t this allow
      to have concurent AIO_DIO requests.

Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Dmitry Monakhov
2012-09-28 23:21:09 -04:00
committed by Theodore Ts'o
parent ba39ebb614
commit f45ee3a1ea
4 changed files with 15 additions and 8 deletions
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6
fs/ext4/inode.c
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@@ -3056,7 +3056,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
* hook to the iocb.
*/
iocb->private = NULL;
EXT4_I(inode)->cur_aio_dio = NULL;
ext4_inode_aio_set(inode, NULL);
if (!is_sync_kiocb(iocb)) {
ext4_io_end_t *io_end =
ext4_init_io_end(inode, GFP_NOFS);
@@ -3073,7 +3073,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
* is a unwritten extents needs to be converted
* when IO is completed.
*/
EXT4_I(inode)->cur_aio_dio = iocb->private;
ext4_inode_aio_set(inode, io_end);
}
if (overwrite)
@@ -3093,7 +3093,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
NULL,
DIO_LOCKING);
if (iocb->private)
EXT4_I(inode)->cur_aio_dio = NULL;
ext4_inode_aio_set(inode, NULL);
/*
* The io_end structure takes a reference to the inode,
* that structure needs to be destroyed and the