Re: [PATCH 04/14] mm: Add functions to lock invalidate_lock for two mappings

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To: Jan Kara <jack@xxxxxxx>
Subject: Re: [PATCH 04/14] mm: Add functions to lock invalidate_lock for two mappings
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Wed, 16 Jun 2021 06:34:33 +0100
Cc: linux-fsdevel@xxxxxxxxxxxxxxx, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, ceph-devel@xxxxxxxxxxxxxxx, Chao Yu <yuchao0@xxxxxxxxxx>, Damien Le Moal <damien.lemoal@xxxxxxx>, "Darrick J. Wong" <darrick.wong@xxxxxxxxxx>, Jaegeuk Kim <jaegeuk@xxxxxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, Johannes Thumshirn <jth@xxxxxxxxxx>, linux-cifs@xxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, Miklos Szeredi <miklos@xxxxxxxxxx>, Steve French <sfrench@xxxxxxxxx>, Ted Tso <tytso@xxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, "Darrick J . Wong" <djwong@xxxxxxxxxx>
In-reply-to: <20210615091814.28626-4-jack@suse.cz>
References: <20210615090844.6045-1-jack@suse.cz> <20210615091814.28626-4-jack@suse.cz>

On Tue, Jun 15, 2021 at 11:17:54AM +0200, Jan Kara wrote:
> Some operations such as reflinking blocks among files will need to lock
> invalidate_lock for two mappings. Add helper functions to do that.
> 
> Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
> Signed-off-by: Jan Kara <jack@xxxxxxx>

Looks good,

Reviewed-by: Christoph Hellwig <hch@xxxxxx>

References:
- [PATCH 0/14 v8] fs: Hole punch vs page cache filling races
  - From: Jan Kara
- [PATCH 04/14] mm: Add functions to lock invalidate_lock for two mappings
  - From: Jan Kara

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