On Mon, Apr 08, 2013 at 11:32:08PM +0200, Jan Kara wrote:
> Currently noone cleared buffer_uninit flag. This results in writeback
> needlessly marking io_end as needing extent conversion scanning extent
> tree for extents to convert. So clear the buffer_uninit flag once the
> buffer is submitted for IO and the flag is transformed into
> EXT4_IO_END_UNWRITTEN flag.
>
> Signed-off-by: Jan Kara <jack@xxxxxxx>
Reviewed-by: Zheng Liu <wenqing.lz@xxxxxxxxxx>
Regards,
- Zheng
> ---
> fs/ext4/page-io.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
> index da8bddf..efdf0a5 100644
> --- a/fs/ext4/page-io.c
> +++ b/fs/ext4/page-io.c
> @@ -377,7 +377,7 @@ submit_and_retry:
> if (ret != bh->b_size)
> goto submit_and_retry;
> io_end = io->io_end;
> - if (buffer_uninit(bh))
> + if (test_clear_buffer_uninit(bh))
> ext4_set_io_unwritten_flag(inode, io_end);
> io_end->size += bh->b_size;
> io->io_next_block++;
> --
> 1.7.1
>
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