* [PATCHv2 2/3] ext4: use direct_IO_no_locking in ext4 DIO read
@ 2010-01-12 19:42 Jiaying Zhang
2010-01-12 19:49 ` Jiaying Zhang
0 siblings, 1 reply; 2+ messages in thread
From: Jiaying Zhang @ 2010-01-12 19:42 UTC (permalink / raw)
To: linux-ext4; +Cc: tytso, mrubin, akpm
ext4: Use direct_IO_no_locking in ext4 dio read.
Signed-off-by: Jiaying Zhang <jiayingz@google.com>
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9ee3550..44d2e19 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3395,7 +3395,15 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
}
retry:
- ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+ if (rw == READ && test_opt(inode->i_sb, DIOREAD_NOLOCK)
+ && (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+ ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
+ offset, nr_segs,
+ ext4_get_block, NULL);
+ else
+ ret = blockdev_direct_IO(rw, iocb, inode,
+ inode->i_sb->s_bdev, iov,
offset, nr_segs,
ext4_get_block, NULL);
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCHv2 2/3] ext4: use direct_IO_no_locking in ext4 DIO read
2010-01-12 19:42 [PATCHv2 2/3] ext4: use direct_IO_no_locking in ext4 DIO read Jiaying Zhang
@ 2010-01-12 19:49 ` Jiaying Zhang
0 siblings, 0 replies; 2+ messages in thread
From: Jiaying Zhang @ 2010-01-12 19:49 UTC (permalink / raw)
To: linux-ext4; +Cc: tytso, mrubin, akpm
Oops, this should be [PATCHv2 3/3].
Jiaying
On Tue, Jan 12, 2010 at 11:42 AM, Jiaying Zhang <jiayingz@google.com> wrote:
>
> ext4: Use direct_IO_no_locking in ext4 dio read.
>
> Signed-off-by: Jiaying Zhang <jiayingz@google.com>
>
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index 9ee3550..44d2e19 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -3395,7 +3395,15 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
> }
>
> retry:
> - ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
> + if (rw == READ && test_opt(inode->i_sb, DIOREAD_NOLOCK)
> + && (EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
> + ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
> + inode->i_sb->s_bdev, iov,
> + offset, nr_segs,
> + ext4_get_block, NULL);
> + else
> + ret = blockdev_direct_IO(rw, iocb, inode,
> + inode->i_sb->s_bdev, iov,
> offset, nr_segs,
> ext4_get_block, NULL);
> if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
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