[09/12] xfs: flag files as supporting buffered async reads
diff mbox series

Message ID 20200526195123.29053-10-axboe@kernel.dk
State New
Headers show
Series
  • Add support for async buffered reads
Related show

Commit Message

Jens Axboe May 26, 2020, 7:51 p.m. UTC
XFS uses generic_file_read_iter(), which already supports this.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/xfs/xfs_file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Darrick J. Wong May 28, 2020, 5:53 p.m. UTC | #1
On Tue, May 26, 2020 at 01:51:20PM -0600, Jens Axboe wrote:
> XFS uses generic_file_read_iter(), which already supports this.
> 
> Signed-off-by: Jens Axboe <axboe@kernel.dk>

Er... I guess that looks ok?  Assuming you've done enough qa on
io_uring to be able to tell if this breaks anything, since touching the
mm always feels murky to me:

Acked-by: Darrick J. Wong <darrick.wong@oracle.com>

--D

> ---
>  fs/xfs/xfs_file.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 4b8bdecc3863..97f44fbf17f2 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -1080,7 +1080,7 @@ xfs_file_open(
>  		return -EFBIG;
>  	if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb)))
>  		return -EIO;
> -	file->f_mode |= FMODE_NOWAIT;
> +	file->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
>  	return 0;
>  }
>  
> -- 
> 2.26.2
>
Jens Axboe May 28, 2020, 7:23 p.m. UTC | #2
On 5/28/20 11:53 AM, Darrick J. Wong wrote:
> On Tue, May 26, 2020 at 01:51:20PM -0600, Jens Axboe wrote:
>> XFS uses generic_file_read_iter(), which already supports this.
>>
>> Signed-off-by: Jens Axboe <axboe@kernel.dk>
> 
> Er... I guess that looks ok?  Assuming you've done enough qa on
> io_uring to be able to tell if this breaks anything, since touching the
> mm always feels murky to me:
> 

The mm bits should be fine, haven't seen anything odd in testing.
And it's not like the mm changes are super complicated, I think
they turned out pretty clean and straight forward.

> Acked-by: Darrick J. Wong <darrick.wong@oracle.com>

Thanks!

Patch
diff mbox series

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 4b8bdecc3863..97f44fbf17f2 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1080,7 +1080,7 @@  xfs_file_open(
 		return -EFBIG;
 	if (XFS_FORCED_SHUTDOWN(XFS_M(inode->i_sb)))
 		return -EIO;
-	file->f_mode |= FMODE_NOWAIT;
+	file->f_mode |= FMODE_NOWAIT | FMODE_BUF_RASYNC;
 	return 0;
 }