linux-kernel - Re: [PATCH 08/12] xfs: simplify xfs_ioend_can

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Message-ID: <20190624160056.GN5387@magnolia>
Date:   Mon, 24 Jun 2019 09:00:56 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Damien Le Moal <Damien.LeMoal@....com>,
        Andreas Gruenbacher <agruenba@...hat.com>,
        linux-xfs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/12] xfs: simplify xfs_ioend_can_merge

On Mon, Jun 24, 2019 at 07:52:49AM +0200, Christoph Hellwig wrote:
> Compare the block layer status directly instead of converting it to
> an errno first.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@...cle.com>

--D

> ---
>  fs/xfs/xfs_aops.c | 14 ++------------
>  1 file changed, 2 insertions(+), 12 deletions(-)
> 
> diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
> index 017b87b7765f..acbd73976067 100644
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@ -226,13 +226,9 @@ xfs_end_ioend(
>  static bool
>  xfs_ioend_can_merge(
>  	struct xfs_ioend	*ioend,
> -	int			ioend_error,
>  	struct xfs_ioend	*next)
>  {
> -	int			next_error;
> -
> -	next_error = blk_status_to_errno(next->io_bio->bi_status);
> -	if (ioend_error != next_error)
> +	if (ioend->io_bio->bi_status != next->io_bio->bi_status)
>  		return false;
>  	if ((ioend->io_fork == XFS_COW_FORK) ^ (next->io_fork == XFS_COW_FORK))
>  		return false;
> @@ -251,17 +247,11 @@ xfs_ioend_try_merge(
>  	struct list_head	*more_ioends)
>  {
>  	struct xfs_ioend	*next_ioend;
> -	int			ioend_error;
> -
> -	if (list_empty(more_ioends))
> -		return;
> -
> -	ioend_error = blk_status_to_errno(ioend->io_bio->bi_status);
>  
>  	while (!list_empty(more_ioends)) {
>  		next_ioend = list_first_entry(more_ioends, struct xfs_ioend,
>  				io_list);
> -		if (!xfs_ioend_can_merge(ioend, ioend_error, next_ioend))
> +		if (!xfs_ioend_can_merge(ioend, next_ioend))
>  			break;
>  		list_move_tail(&next_ioend->io_list, &ioend->io_list);
>  		ioend->io_size += next_ioend->io_size;
> -- 
> 2.20.1
>