Re: [PATCH] blk-mq: determine in advance whether batch alloc can be performed

From: Jens Axboe
Date: Fri Aug 26 2022 - 09:33:40 EST


On 8/25/22 7:26 PM, Liu Song wrote:
> From: Liu Song <liusong@xxxxxxxxxxxxxxxxx>
>
> Some conditions for judging whether batch alloc can be performed are
> included in "blk_mq_get_tags", and this function is only used by
> "__blk_mq_alloc_requests_batch".
>
> This patch introduced a helper "can_do_batch_alloc" to prepend the
> judgment condition and avoid unnecessary function calls.

Curious if you saw any differences from this? Or do you just consider
it a cleanup?

--
Jens Axboe