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Re: [PATCH 01/32] block: Provide blkdev_get_handle_* functions
- To: Matthew Wilcox <willy@xxxxxxxxxxxxx>
- From: Bart Van Assche <bvanassche@xxxxxxx>
- Date: Wed, 5 Jul 2023 08:19:16 -0700
- Cc: Jan Kara <jack@xxxxxxx>, linux-block@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Jens Axboe <axboe@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Alasdair Kergon <agk@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Anna Schumaker <anna@xxxxxxxxxx>, Chao Yu <chao@xxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, "Darrick J. Wong" <djwong@xxxxxxxxxx>, Dave Kleikamp <shaggy@xxxxxxxxxx>, David Sterba <dsterba@xxxxxxxx>, dm-devel@xxxxxxxxxx, drbd-dev@xxxxxxxxxxxxxxxx, Gao Xiang <xiang@xxxxxxxxxx>, Jack Wang <jinpu.wang@xxxxxxxxx>, Jaegeuk Kim <jaegeuk@xxxxxxxxxx>, jfs-discussion@xxxxxxxxxxxxxxxxxxxxx, Joern Engel <joern@xxxxxxxxxxxxxxx>, Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>, Kent Overstreet <kent.overstreet@xxxxxxxxx>, linux-bcache@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, linux-erofs@xxxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, linux-nilfs@xxxxxxxxxxxxxxx, linux-nvme@xxxxxxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, "Md. Haris Iqbal" <haris.iqbal@xxxxxxxxx>, Mike Snitzer <snitzer@xxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, ocfs2-devel@xxxxxxxxxxxxxx, reiserfs-devel@xxxxxxxxxxxxxxx, Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>, Song Liu <song@xxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, target-devel@xxxxxxxxxxxxxxx, Ted Tso <tytso@xxxxxxx>, Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 05 Jul 2023 15:19:37 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 7/4/23 09:14, Matthew Wilcox wrote:
On Tue, Jul 04, 2023 at 07:06:26AM -0700, Bart Van Assche wrote:
On 7/4/23 05:21, Jan Kara wrote:
+struct bdev_handle {
+ struct block_device *bdev;
+ void *holder;
+};
Please explain in the patch description why a holder pointer is introduced
in struct bdev_handle and how it relates to the bd_holder pointer in struct
block_device. Is one of the purposes of this patch series perhaps to add
support for multiple holders per block device?
That is all in patch 0/32. Why repeat it?
This cover letter:
https://lore.kernel.org/linux-block/20230629165206.383-1-jack@xxxxxxx/T/#t?
The word "holder" doesn't even occur in that cover letter so how could the
answer to my question be present in the cover letter?
Bart.
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