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c66fd01971
Move the block holder code into a separate file as it is not in any way
related to the other block_dev.c code, and add a new selectable config
option for it so that we don't have to build it without any remapped
drivers selected.
The Kconfig symbol contains a _DEPRECATED suffix to match the comments
added in commit 49731baa41
("block: restore multiple bd_link_disk_holder() support").
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20210804094147.459763-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
38 lines
1.1 KiB
Text
38 lines
1.1 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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config BCACHE
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tristate "Block device as cache"
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select BLOCK_HOLDER_DEPRECATED if SYSFS
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select CRC64
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help
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Allows a block device to be used as cache for other devices; uses
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a btree for indexing and the layout is optimized for SSDs.
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See Documentation/admin-guide/bcache.rst for details.
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config BCACHE_DEBUG
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bool "Bcache debugging"
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depends on BCACHE
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help
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Don't select this option unless you're a developer
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Enables extra debugging tools, allows expensive runtime checks to be
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turned on.
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config BCACHE_CLOSURES_DEBUG
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bool "Debug closures"
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depends on BCACHE
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select DEBUG_FS
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help
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Keeps all active closures in a linked list and provides a debugfs
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interface to list them, which makes it possible to see asynchronous
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operations that get stuck.
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config BCACHE_ASYNC_REGISTRATION
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bool "Asynchronous device registration (EXPERIMENTAL)"
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depends on BCACHE
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help
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Add a sysfs file /sys/fs/bcache/register_async. Writing registering
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device path into this file will returns immediately and the real
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registration work is handled in kernel work queue in asynchronous
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way.
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