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@xxxxxx>
Looks good. You can add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
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@xxxxxxxx>
SUSE Labs, CR
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