linux-kernel - Re: [PATCH v5 4/5] fs: blkdev set bio prio from kiocb prio

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Message-ID: <x49r2m4u3e6.fsf@segfault.boston.devel.redhat.com>
Date:   Mon, 21 May 2018 17:04:17 -0400
From:   Jeff Moyer <jmoyer@...hat.com>
To:     adam.manzanares@....com
Cc:     viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
        axboe@...nel.dk, bcrl@...ck.org, tglx@...utronix.de,
        mingo@...nel.org, pombredanne@...b.com,
        kstewart@...uxfoundation.org, gregkh@...uxfoundation.org,
        bigeasy@...utronix.de, jack@...e.cz, darrick.wong@...cle.com,
        rgoldwyn@...e.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-aio@...ck.org,
        linux-api@...r.kernel.org, hch@...radead.org
Subject: Re: [PATCH v5 4/5] fs: blkdev set bio prio from kiocb prio

adam.manzanares@....com writes:

> From: Adam Manzanares <adam.manzanares@....com>
>
> Now that kiocb has an ioprio field copy this over to the bio when it is
> created from the kiocb.
>
> Signed-off-by: Adam Manzanares <adam.manzanares@....com>
> ---
>  fs/block_dev.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/fs/block_dev.c b/fs/block_dev.c
> index 7ec920e27065..da1e94d2bb75 100644
> --- a/fs/block_dev.c
> +++ b/fs/block_dev.c
> @@ -355,6 +355,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
>  		bio->bi_write_hint = iocb->ki_hint;
>  		bio->bi_private = dio;
>  		bio->bi_end_io = blkdev_bio_end_io;
> +		bio->bi_ioprio = iocb->ki_ioprio;
>  
>  		ret = bio_iov_iter_get_pages(bio, iter);
>  		if (unlikely(ret)) {

Forgot to mention, you should also convert __blkdev_direct_IO_simple.

-Jeff