From: Ming Lei <ming.lei@redhat.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, Sagi Grimberg <sagi@grimberg.me>,
Baolin Wang <baolin.wang7@gmail.com>
Subject: Re: [PATCH 6/9] blk-mq: move code for handling partial dispatch into one helper
Date: Thu, 14 May 2020 09:25:05 +0800 [thread overview]
Message-ID: <20200514012505.GG2073570@T590> (raw)
In-Reply-To: <20200513130100.GH23958@infradead.org>
On Wed, May 13, 2020 at 06:01:00AM -0700, Christoph Hellwig wrote:
> Btw, with the many arguments an more beeing added later I'm not sure
blk_mq_handle_partial_dispatch() is always inlined, and each parameter
has precise meaning, so IMO more parameters shouldn't be an issue.
> anymore if this is really worth a separate function or just if goto
> label at the end of blk_mq_dispatch_rq_list that can be jumped to,
> and which has the same amount of indentation is the better idea.
>
There are more benefits in this way:
1) blk_mq_dispatch_rq_list() becomes more readable
2) name of blk_mq_handle_partial_dispatch() has document benefit.
3) it is easier to add new code into both blk_mq_dispatch_rq_list()
and blk_mq_handle_partial_dispatch(), same with changes on both two
functions.
4) easier to verify/review two small function
So IMO it is worth a separate function, especially blk_mq_dispatch_rq_list()
is becoming a big monster function.
Thanks,
Ming
next prev parent reply other threads:[~2020-05-14 1:25 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 9:54 [PATCH 0/9] blk-mq: support batching dispatch from scheduler Ming Lei
2020-05-13 9:54 ` [PATCH 1/9] blk-mq: pass request queue into get/put budget callback Ming Lei
2020-05-13 10:06 ` Johannes Thumshirn
2020-05-13 12:24 ` Christoph Hellwig
2020-05-13 14:36 ` Doug Anderson
2020-05-13 22:48 ` Sagi Grimberg
2020-05-13 9:54 ` [PATCH 2/9] blk-mq: pass hctx to blk_mq_dispatch_rq_list Ming Lei
2020-05-13 12:26 ` Christoph Hellwig
2020-05-13 22:49 ` Sagi Grimberg
2020-05-13 9:54 ` [PATCH 3/9] blk-mq: don't predicate last flag in blk_mq_dispatch_rq_list Ming Lei
2020-05-13 12:27 ` Christoph Hellwig
2020-05-14 0:50 ` Ming Lei
2020-05-14 5:50 ` Christoph Hellwig
2020-05-14 2:09 ` Ming Lei
2020-05-14 2:19 ` Ming Lei
2020-05-14 3:21 ` Keith Busch
2020-05-14 8:28 ` Ming Lei
2020-05-13 9:54 ` [PATCH 4/9] blk-mq: move getting driver tag and bugget into one helper Ming Lei
2020-05-13 12:37 ` Christoph Hellwig
2020-05-13 22:54 ` Sagi Grimberg
2020-05-13 9:54 ` [PATCH 5/9] blk-mq: move .queue_rq code " Ming Lei
2020-05-13 12:38 ` Christoph Hellwig
2020-05-13 9:54 ` [PATCH 6/9] blk-mq: move code for handling partial dispatch " Ming Lei
2020-05-13 12:56 ` Christoph Hellwig
2020-05-13 13:01 ` Christoph Hellwig
2020-05-14 1:25 ` Ming Lei [this message]
2020-05-13 9:54 ` [PATCH 7/9] blk-mq: remove dead check from blk_mq_dispatch_rq_list Ming Lei
2020-05-13 12:57 ` Christoph Hellwig
2020-05-13 23:24 ` Sagi Grimberg
2020-05-13 9:54 ` [PATCH 8/9] blk-mq: pass obtained budget count to blk_mq_dispatch_rq_list Ming Lei
2020-05-13 13:26 ` Christoph Hellwig
2020-05-13 9:54 ` [PATCH 9/9] blk-mq: support batching dispatch in case of io scheduler Ming Lei
2020-05-23 7:45 ` [PATCH 0/9] blk-mq: support batching dispatch from scheduler Baolin Wang
2020-05-25 2:17 ` Ming Lei
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