kernel/0001-ext4-ext4_inode_info-diet.patch

122 lines
4.0 KiB
Diff

From 50b61634cf8d09f9ef334919b859735d381cbe39 Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmonakhov@openvz.org>
Date: Fri, 28 Sep 2012 23:21:09 -0400
Subject: [PATCH 01/13] ext4: ext4_inode_info diet
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>
(cherry picked from commit f45ee3a1ea438af96e4fd2c0b16d195e67ef235f)
---
fs/ext4/ext4.h | 12 ++++++++++--
fs/ext4/extents.c | 4 ++--
fs/ext4/inode.c | 6 +++---
fs/ext4/super.c | 1 -
4 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c3411d4..80afc8f 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -912,8 +912,6 @@ struct ext4_inode_info {
struct list_head i_completed_io_list;
spinlock_t i_completed_io_lock;
atomic_t i_ioend_count; /* Number of outstanding io_end structs */
- /* current io_end structure for async DIO write*/
- ext4_io_end_t *cur_aio_dio;
atomic_t i_aiodio_unwritten; /* Nr. of inflight conversions pending */
spinlock_t i_block_reservation_lock;
@@ -1332,6 +1330,16 @@ static inline void ext4_set_io_unwritten_flag(struct inode *inode,
}
}
+static inline ext4_io_end_t *ext4_inode_aio(struct inode *inode)
+{
+ return inode->i_private;
+}
+
+static inline void ext4_inode_aio_set(struct inode *inode, ext4_io_end_t *io)
+{
+ inode->i_private = io;
+}
+
/*
* Inode dynamic state flags
*/
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index aabbb3f..51fbef1 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3600,7 +3600,7 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
{
int ret = 0;
int err = 0;
- ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio;
+ ext4_io_end_t *io = ext4_inode_aio(inode);
ext_debug("ext4_ext_handle_uninitialized_extents: inode %lu, logical "
"block %llu, max_blocks %u, flags %x, allocated %u\n",
@@ -3858,7 +3858,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
unsigned int allocated = 0, offset = 0;
unsigned int allocated_clusters = 0;
struct ext4_allocation_request ar;
- ext4_io_end_t *io = EXT4_I(inode)->cur_aio_dio;
+ ext4_io_end_t *io = ext4_inode_aio(inode);
ext4_lblk_t cluster_offset;
ext_debug("blocks %u/%u requested for inode %lu\n",
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index dff171c..acadd2b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3054,7 +3054,7 @@ 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);
@@ -3071,7 +3071,7 @@ 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)
@@ -3091,7 +3091,7 @@ 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
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c6e0cb3..270e58f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -956,7 +956,6 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
ei->jinode = NULL;
INIT_LIST_HEAD(&ei->i_completed_io_list);
spin_lock_init(&ei->i_completed_io_lock);
- ei->cur_aio_dio = NULL;
ei->i_sync_tid = 0;
ei->i_datasync_tid = 0;
atomic_set(&ei->i_ioend_count, 0);
--
1.7.12.rc0.22.gcdd159b