Re: [PATCH v2 2/2] loop: use task_work for autoclear operation

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To: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 18 Jan 2022 17:15:26 +0100
Cc: Christoph Hellwig <hch@xxxxxx>, Jan Kara <jack@xxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Dan Schatzberg <schatzberg.dan@xxxxxxxxx>, kernel test robot <oliver.sang@xxxxxxxxx>, Jan Stancek <jstancek@xxxxxxxxxx>, linux-block <linux-block@xxxxxxxxxxxxxxx>
In-reply-to: <f6b947d0-1047-66b3-0243-af5017c9ab55@I-love.SAKURA.ne.jp>
References: <d1ca4fa4-ac3e-1354-3d94-1bf55f2000a9@I-love.SAKURA.ne.jp> <20220112131615.qsdxx6r7xvnvlwgx@quack3.lan> <20220113104424.u6fj3z2zd34ohthc@quack3.lan> <f893638a-2109-c197-9783-c5e6dced23e5@I-love.SAKURA.ne.jp> <20220114195840.kdzegicjx7uyscoq@quack3.lan> <33f360ca-d3e1-7070-654e-26ef22109a61@I-love.SAKURA.ne.jp> <20220117081554.GA22708@lst.de> <cdaf1346-2885-f0da-8878-12264bd48348@I-love.SAKURA.ne.jp> <1c400c45-1427-6c8c-8053-a4e1e7e92b81@I-love.SAKURA.ne.jp> <f6b947d0-1047-66b3-0243-af5017c9ab55@I-love.SAKURA.ne.jp>
User-agent: Mutt/1.5.17 (2007-11-01)

I'll try to take a look.  I've been busy today coming up with a scheme
that avoids taking ->open_mutex outside the open/release path at all,
which should also help, but it's not quite ready.

References:
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Tetsuo Handa
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Jan Kara
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Jan Kara
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Tetsuo Handa
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Jan Kara
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Tetsuo Handa
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Christoph Hellwig
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Tetsuo Handa
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Tetsuo Handa
- Re: [PATCH v2 2/2] loop: use task_work for autoclear operation
  - From: Tetsuo Handa

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