Re: [PATCH 6/9] block: add a mark_dead holder operation

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To: "Darrick J. Wong" <djwong@xxxxxxxxxx>
Subject: Re: [PATCH 6/9] block: add a mark_dead holder operation
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 9 May 2023 15:30:26 +0200
Cc: Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Christian Brauner <brauner@xxxxxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx
In-reply-to: <20230505183749.GG15394@frogsfrogsfrogs>
References: <20230505175132.2236632-1-hch@lst.de> <20230505175132.2236632-7-hch@lst.de> <20230505183749.GG15394@frogsfrogsfrogs>
User-agent: Mutt/1.5.17 (2007-11-01)

On Fri, May 05, 2023 at 11:37:49AM -0700, Darrick J. Wong wrote:
> Now that we have blockdev callbacks, can we add a pair for freeze_bdev
> and thaw_bdev so that LVM snapshotting an xfs log device can actually
> quiesce the filesystem?

Probably.  Assuming we're not creating any really weird locking dependency
that way.

References:
- introduce bdev holder ops and a file system shutdown method
  - From: Christoph Hellwig
- [PATCH 6/9] block: add a mark_dead holder operation
  - From: Christoph Hellwig
- Re: [PATCH 6/9] block: add a mark_dead holder operation
  - From: Darrick J. Wong

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