linux-kernel - Re: [PATCH 1/8] block: add WRITE

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Date:   Sat, 5 Nov 2016 23:27:06 +0100
From:   Jan Kara <jack@...e.cz>
To:     Jens Axboe <axboe@...com>
Cc:     axboe@...nel.dk, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-block@...r.kernel.org,
        jack@...e.cz, hch@....de
Subject: Re: [PATCH 1/8] block: add WRITE_BACKGROUND

On Tue 01-11-16 15:08:44, Jens Axboe wrote:
> This adds a new request flag, REQ_BACKGROUND, that callers can use to
> tell the block layer that this is background (non-urgent) IO.
> 
> Signed-off-by: Jens Axboe <axboe@...com>

Looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  include/linux/blk_types.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
> index bb921028e7c5..562ac46cb790 100644
> --- a/include/linux/blk_types.h
> +++ b/include/linux/blk_types.h
> @@ -177,6 +177,7 @@ enum req_flag_bits {
>  	__REQ_FUA,		/* forced unit access */
>  	__REQ_PREFLUSH,		/* request for cache flush */
>  	__REQ_RAHEAD,		/* read ahead, can fail anytime */
> +	__REQ_BACKGROUND,	/* background IO */
>  	__REQ_NR_BITS,		/* stops here */
>  };
>  
> @@ -192,6 +193,7 @@ enum req_flag_bits {
>  #define REQ_FUA			(1ULL << __REQ_FUA)
>  #define REQ_PREFLUSH		(1ULL << __REQ_PREFLUSH)
>  #define REQ_RAHEAD		(1ULL << __REQ_RAHEAD)
> +#define REQ_BACKGROUND		(1ULL << __REQ_BACKGROUND)
>  
>  #define REQ_FAILFAST_MASK \
>  	(REQ_FAILFAST_DEV | REQ_FAILFAST_TRANSPORT | REQ_FAILFAST_DRIVER)
> -- 
> 2.7.4
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR