linux-ext4 - Re: [PATCHv2 2/3] ext4: use direct_IO_no

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Message-ID: <5df78e1d1001121149y94a3c82x5140b6deab0d7a0b@mail.gmail.com>
Date:	Tue, 12 Jan 2010 11:49:40 -0800
From:	Jiaying Zhang <jiayingz@...gle.com>
To:	linux-ext4@...r.kernel.org
Cc:	tytso@....edu, mrubin@...gle.com, akpm@...ux-foundation.org
Subject: Re: [PATCHv2 2/3] ext4: use direct_IO_no_locking in ext4 DIO read

Oops, this should be [PATCHv2 3/3].

Jiaying

On Tue, Jan 12, 2010 at 11:42 AM, Jiaying Zhang <jiayingz@...gle.com> wrote:
>
>    ext4: Use direct_IO_no_locking in ext4 dio read.
>
>    Signed-off-by: Jiaying Zhang <jiayingz@...gle.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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