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authorChristoph Hellwig <hch@infradead.org>2013-09-04 13:04:39 (GMT)
committerAl Viro <viro@zeniv.linux.org.uk>2013-09-04 13:23:46 (GMT)
commit7b7a8665edd8db733980389b098530f9e4f630b2 (patch)
tree968d570a9f0c4d861226aefed2f5f97a131c8d53 /fs/ocfs2/aops.c
parent4b6ccca701ef5977d0ffbc2c932430dea88b38b6 (diff)
downloadlinux-7b7a8665edd8db733980389b098530f9e4f630b2.tar.xz
direct-io: Implement generic deferred AIO completions
Add support to the core direct-io code to defer AIO completions to user context using a workqueue. This replaces opencoded and less efficient code in XFS and ext4 (we save a memory allocation for each direct IO) and will be needed to properly support O_(D)SYNC for AIO. The communication between the filesystem and the direct I/O code requires a new buffer head flag, which is a bit ugly but not avoidable until the direct I/O code stops abusing the buffer_head structure for communicating with the filesystems. Currently this creates a per-superblock unbound workqueue for these completions, which is taken from an earlier patch by Jan Kara. I'm not really convinced about this use and would prefer a "normal" global workqueue with a high concurrency limit, but this needs further discussion. JK: Fixed ext4 part, dynamic allocation of the workqueue. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ocfs2/aops.c')
-rw-r--r--fs/ocfs2/aops.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 2abf97b..94417a8 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -565,9 +565,7 @@ bail:
static void ocfs2_dio_end_io(struct kiocb *iocb,
loff_t offset,
ssize_t bytes,
- void *private,
- int ret,
- bool is_async)
+ void *private)
{
struct inode *inode = file_inode(iocb->ki_filp);
int level;
@@ -592,10 +590,6 @@ static void ocfs2_dio_end_io(struct kiocb *iocb,
level = ocfs2_iocb_rw_locked_level(iocb);
ocfs2_rw_unlock(inode, level);
-
- inode_dio_done(inode);
- if (is_async)
- aio_complete(iocb, ret, 0);
}
/*