Re: [PATCH V2 03/20] block: don't call freeze queue in elevator_switch() and elevator_disable()

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To: Ming Lei <ming.lei@xxxxxxxxxx>
Subject: Re: [PATCH V2 03/20] block: don't call freeze queue in elevator_switch() and elevator_disable()
From: Christoph Hellwig <hch@xxxxxx>
Date: Mon, 21 Apr 2025 14:34:56 +0200
Cc: Jens Axboe <axboe@xxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, Nilay Shroff <nilay@xxxxxxxxxxxxx>, Shinichiro Kawasaki <shinichiro.kawasaki@xxxxxxx>, Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>
In-reply-to: <20250418163708.442085-4-ming.lei@redhat.com>
References: <20250418163708.442085-1-ming.lei@redhat.com> <20250418163708.442085-4-ming.lei@redhat.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Sat, Apr 19, 2025 at 12:36:44AM +0800, Ming Lei wrote:
> Both elevator_switch() and elevator_disable() are called from sysfs
> store and updating nr_hw_queue code paths only.

I don't understand this sentence.  What does
"and updating nr_hw_queue code paths only" mean?

Follow-Ups:
- Re: [PATCH V2 03/20] block: don't call freeze queue in elevator_switch() and elevator_disable()
  - From: Ming Lei

References:
- [PATCH V2 00/20] block: unify elevator changing and fix lockdep warning
  - From: Ming Lei
- [PATCH V2 03/20] block: don't call freeze queue in elevator_switch() and elevator_disable()
  - From: Ming Lei

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