![Minchan Kim](/assets/img/avatar_default.png)
This patch adds document and kconfig for using of writeback feature. Link: http://lkml.kernel.org/r/1498459987-24562-10-git-send-email-minchan@kernel.org Signed-off-by: Minchan Kim <minchan@kernel.org> Cc: Juneho Choi <juno.choi@lge.com> Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
28 lines
908 B
Plaintext
28 lines
908 B
Plaintext
config ZRAM
|
|
tristate "Compressed RAM block device support"
|
|
depends on BLOCK && SYSFS && ZSMALLOC && CRYPTO
|
|
select CRYPTO_LZO
|
|
default n
|
|
help
|
|
Creates virtual block devices called /dev/zramX (X = 0, 1, ...).
|
|
Pages written to these disks are compressed and stored in memory
|
|
itself. These disks allow very fast I/O and compression provides
|
|
good amounts of memory savings.
|
|
|
|
It has several use cases, for example: /tmp storage, use as swap
|
|
disks and maybe many more.
|
|
|
|
See zram.txt for more information.
|
|
|
|
config ZRAM_WRITEBACK
|
|
bool "Write back incompressible page to backing device"
|
|
depends on ZRAM
|
|
default n
|
|
help
|
|
With incompressible page, there is no memory saving to keep it
|
|
in memory. Instead, write it out to backing device.
|
|
For this feature, admin should set up backing device via
|
|
/sys/block/zramX/backing_dev.
|
|
|
|
See zram.txt for more infomration.
|