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SubjectRe: [PATCH 04/13] aoe: set an optimal I/O size
On Mon 21-09-20 10:07:25, Christoph Hellwig wrote:
> aoe forces a larger readahead size, but any reason to do larger I/O
> is not limited to readahead. Also set the optimal I/O size, and
> remove the local constants in favor of just using SZ_2G.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>

Looks good. You can add:

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

Honza

> ---
> drivers/block/aoe/aoeblk.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
> index 5ca7216e9e01f3..d8cfc233e64b93 100644
> --- a/drivers/block/aoe/aoeblk.c
> +++ b/drivers/block/aoe/aoeblk.c
> @@ -347,7 +347,6 @@ aoeblk_gdalloc(void *vp)
> mempool_t *mp;
> struct request_queue *q;
> struct blk_mq_tag_set *set;
> - enum { KB = 1024, MB = KB * KB, READ_AHEAD = 2 * MB, };
> ulong flags;
> int late = 0;
> int err;
> @@ -407,7 +406,8 @@ aoeblk_gdalloc(void *vp)
> WARN_ON(d->gd);
> WARN_ON(d->flags & DEVFL_UP);
> blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS);
> - q->backing_dev_info->ra_pages = READ_AHEAD / PAGE_SIZE;
> + q->backing_dev_info->ra_pages = SZ_2M / PAGE_SIZE;
> + blk_queue_io_opt(q, SZ_2M);
> d->bufpool = mp;
> d->blkq = gd->queue = q;
> q->queuedata = d;
> --
> 2.28.0
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR

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