From: Jan Kara <jack@suse.cz>
To: Yu Kuai <yukuai1@huaweicloud.com>
Cc: axboe@kernel.dk, roger.pau@citrix.com, colyli@suse.de,
kent.overstreet@gmail.com, joern@lazybastard.org,
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gfs2@lists.linux.dev, linux-nilfs@vger.kernel.org,
yukuai3@huawei.com, yi.zhang@huawei.com, yangerkun@huawei.com
Subject: Re: [PATCH RFC v2 for-6.8/block 17/18] ext4: remove block_device_ejected()
Date: Mon, 11 Dec 2023 18:04:03 +0100 [thread overview]
Message-ID: <20231211170403.biwgd7l7pud7s7ip@quack3> (raw)
In-Reply-To: <20231211140833.975935-1-yukuai1@huaweicloud.com>
On Mon 11-12-23 22:08:33, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@huawei.com>
>
> block_device_ejected() is added by commit bdfe0cbd746a ("Revert
> "ext4: remove block_device_ejected"") in 2015. At that time 'bdi->wb'
> is destroyed synchronized from del_gendisk(), hence if ext4 is still
> mounted, and then mark_buffer_dirty() will reference destroyed 'wb'.
> However, such problem doesn't exist anymore:
>
> - commit d03f6cdc1fc4 ("block: Dynamically allocate and refcount
> backing_dev_info") switch bdi to use refcounting;
> - commit 13eec2363ef0 ("fs: Get proper reference for s_bdi"), will grab
> additional reference of bdi while mounting, so that 'bdi->wb' will not
> be destroyed until generic_shutdown_super().
>
> Hence remove this dead function block_device_ejected().
>
> Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Agreed, this should not be needed anymore. We'll see whether this is true
also in practice :). Feel free to add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
next prev parent reply other threads:[~2023-12-11 17:04 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-11 14:05 [PATCH RFC v2 for-6.8/block 00/18] block: don't access bd_inode directly from other modules Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 01/18] block: add some bdev apis Yu Kuai
2023-12-11 16:52 ` Jan Kara
2023-12-12 1:25 ` Yu Kuai
2023-12-12 13:14 ` Christoph Hellwig
2023-12-13 1:10 ` Yu Kuai
2023-12-12 13:16 ` Christoph Hellwig
2023-12-13 1:09 ` Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 02/18] xen/blkback: use bdev api in xen_update_blkif_status() Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 03/18] bcache: use bdev api in read_super() Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 04/18] mtd: block2mtd: use bdev apis Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 05/18] s390/dasd: use bdev api in dasd_format() Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 06/18] scsicam: use bdev api in scsi_bios_ptable() Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 07/18] bcachefs: remove dead function bdev_sectors() Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 08/18] bio: export bio_add_folio_nofail() Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 09/18] btrfs: use bdev apis Yu Kuai
2023-12-11 14:05 ` [PATCH RFC v2 for-6.8/block 10/18] cramfs: use bdev apis in cramfs_blkdev_read() Yu Kuai
2023-12-11 14:07 ` [PATCH RFC v2 for-6.8/block 11/18] erofs: use bdev api Yu Kuai
2023-12-12 6:35 ` Gao Xiang
2023-12-12 6:49 ` Yu Kuai
2023-12-11 14:07 ` [PATCH RFC v2 for-6.8/block 12/18] gfs2: " Yu Kuai
2023-12-11 14:07 ` [PATCH RFC v2 for-6.8/block 13/18] nilfs2: use bdev api in nilfs_attach_log_writer() Yu Kuai
2023-12-11 14:07 ` [PATCH RFC v2 for-6.8/block 14/18] jbd2: use bdev apis Yu Kuai
2023-12-11 14:07 ` [PATCH RFC v2 for-6.8/block 15/18] buffer: add a new helper to read sb block Yu Kuai
2023-12-11 17:27 ` Jan Kara
2023-12-12 1:32 ` Yu Kuai
2023-12-12 13:25 ` Christoph Hellwig
2023-12-12 14:11 ` Jan Kara
2023-12-11 14:08 ` [PATCH RFC v2 for-6.8/block 16/18] ext4: use " Yu Kuai
2023-12-11 17:16 ` Jan Kara
2023-12-11 14:08 ` [PATCH RFC v2 for-6.8/block 17/18] ext4: remove block_device_ejected() Yu Kuai
2023-12-11 17:04 ` Jan Kara [this message]
2023-12-12 13:22 ` Christoph Hellwig
2023-12-11 14:08 ` [PATCH RFC v2 for-6.8/block 18/18] ext4: use bdev apis Yu Kuai
2023-12-11 17:02 ` Jan Kara
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