Re: [PATCH V2 10/13] block: add helper of disk_release_queue for release queue data for disk

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To: Ming Lei <ming.lei@xxxxxxxxxx>
Subject: Re: [PATCH V2 10/13] block: add helper of disk_release_queue for release queue data for disk
From: Christoph Hellwig <hch@xxxxxx>
Date: Mon, 24 Jan 2022 14:16:24 +0100
Cc: Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx
In-reply-to: <20220122111054.1126146-11-ming.lei@redhat.com>
User-agent: Mutt/1.5.17 (2007-11-01)

On Sat, Jan 22, 2022 at 07:10:51PM +0800, Ming Lei wrote:
> Add one helper of disk_release_queue for releasing queue data for disk.

Please explain what "queue data for disk" is, and why this helper is
useful.  Right now it seems to just move a few things around without a
rationale or explanation of why it is safe.

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References:
- [PATCH V2 00/13] block: don't drain file system I/O on del_gendisk
  - From: Ming Lei
- [PATCH V2 10/13] block: add helper of disk_release_queue for release queue data for disk
  - From: Ming Lei

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