Re: [PATCH v3 2/3] blk-mq: ktime_get_ns() only once for batched requests init

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To: Christoph Hellwig <hch@xxxxxx>
Subject: Re: [PATCH v3 2/3] blk-mq: ktime_get_ns() only once for batched requests init
From: Chengming Zhou <chengming.zhou@xxxxxxxxx>
Date: Thu, 29 Jun 2023 14:44:33 +0800
Cc: axboe@xxxxxxxxx, tj@xxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, zhouchengming@xxxxxxxxxxxxx, ming.lei@xxxxxxxxxx
In-reply-to: <20230629053001.GE16819@lst.de>
References: <20230628124546.1056698-1-chengming.zhou@linux.dev> <20230628124546.1056698-3-chengming.zhou@linux.dev> <20230629053001.GE16819@lst.de>

On 2023/6/29 13:30, Christoph Hellwig wrote:
> Can we just stash the start time into blk_mq_alloc_data instead of
> passing down yet another parameter?
> 

Yes, it's much better.

Thanks.

References:
- [PATCH v3 0/3] blk-mq: fix start_time_ns and alloc_time_ns for pre-allocated rq
  - From: chengming . zhou
- [PATCH v3 2/3] blk-mq: ktime_get_ns() only once for batched requests init
  - From: chengming . zhou
- Re: [PATCH v3 2/3] blk-mq: ktime_get_ns() only once for batched requests init
  - From: Christoph Hellwig

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