486c6fba90
'default n' is the default value for any bool or tristate Kconfig
setting so there is no need to write it explicitly.
Also since commit f467c5640c ("kconfig: only write '# CONFIG_FOO
is not set' for visible symbols") the Kconfig behavior is the same
regardless of 'default n' being present or not:
...
One side effect of (and the main motivation for) this change is making
the following two definitions behave exactly the same:
config FOO
bool
config FOO
bool
default n
With this change, neither of these will generate a
'# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied).
That might make it clearer to people that a bare 'default n' is
redundant.
...
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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config ZRAM
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tristate "Compressed RAM block device support"
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depends on BLOCK && SYSFS && ZSMALLOC && CRYPTO
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select CRYPTO_LZO
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help
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Creates virtual block devices called /dev/zramX (X = 0, 1, ...).
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Pages written to these disks are compressed and stored in memory
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itself. These disks allow very fast I/O and compression provides
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good amounts of memory savings.
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It has several use cases, for example: /tmp storage, use as swap
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disks and maybe many more.
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See Documentation/blockdev/zram.txt for more information.
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config ZRAM_WRITEBACK
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bool "Write back incompressible page to backing device"
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depends on ZRAM
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help
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With incompressible page, there is no memory saving to keep it
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in memory. Instead, write it out to backing device.
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For this feature, admin should set up backing device via
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/sys/block/zramX/backing_dev.
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See Documentation/blockdev/zram.txt for more information.
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config ZRAM_MEMORY_TRACKING
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bool "Track zRam block status"
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depends on ZRAM && DEBUG_FS
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help
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With this feature, admin can track the state of allocated blocks
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of zRAM. Admin could see the information via
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/sys/kernel/debug/zram/zramX/block_state.
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See Documentation/blockdev/zram.txt for more information.
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