On Wed 31-08-22 15:21:01, Zhang Yi wrote:
> ll_rw_block() is not safe for the sync read path because it cannot
> guarantee that always submitting read IO if the buffer has been locked,
> so stop using it. We also switch to new bh_readahead() helper for the
> readahead path.
>
> Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx>
Looks good to me. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/gfs2/meta_io.c | 6 ++----
> fs/gfs2/quota.c | 4 +---
> 2 files changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
> index 7e70e0ba5a6c..07e882aa7ebd 100644
> --- a/fs/gfs2/meta_io.c
> +++ b/fs/gfs2/meta_io.c
> @@ -525,8 +525,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
>
> if (buffer_uptodate(first_bh))
> goto out;
> - if (!buffer_locked(first_bh))
> - ll_rw_block(REQ_OP_READ | REQ_META | REQ_PRIO, 1, &first_bh);
> + bh_read_nowait(first_bh, REQ_META | REQ_PRIO);
>
> dblock++;
> extlen--;
> @@ -535,8 +534,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
> bh = gfs2_getbuf(gl, dblock, CREATE);
>
> if (!buffer_uptodate(bh) && !buffer_locked(bh))
> - ll_rw_block(REQ_OP_READ | REQ_RAHEAD | REQ_META |
> - REQ_PRIO, 1, &bh);
> + bh_readahead(bh, REQ_RAHEAD | REQ_META | REQ_PRIO);
> brelse(bh);
> dblock++;
> extlen--;
> diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
> index f201eaf59d0d..0c2ef4226aba 100644
> --- a/fs/gfs2/quota.c
> +++ b/fs/gfs2/quota.c
> @@ -746,9 +746,7 @@ static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index,
> if (PageUptodate(page))
> set_buffer_uptodate(bh);
> if (!buffer_uptodate(bh)) {
> - ll_rw_block(REQ_OP_READ | REQ_META | REQ_PRIO, 1, &bh);
> - wait_on_buffer(bh);
> - if (!buffer_uptodate(bh))
> + if (bh_read(bh, REQ_META | REQ_PRIO))
> goto unlock_out;
> }
> if (gfs2_is_jdata(ip))
> --
> 2.31.1
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
