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authorMinchan Kim <minchan@kernel.org>2017-09-07 01:20:10 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-07 02:27:25 +0200
commit5a47074f0279421778f97b1b1e75686696a5f42a (patch)
treefd81ff3aaa8a707428ba2daadb66fc2c6b28c297 /drivers/block/zram
parentzram: read page from backing device (diff)
downloadlinux-5a47074f0279421778f97b1b1e75686696a5f42a.tar.xz
linux-5a47074f0279421778f97b1b1e75686696a5f42a.zip
zram: add config and doc file for writeback feature
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>
Diffstat (limited to 'drivers/block/zram')
-rw-r--r--drivers/block/zram/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig
index b8ecba6dcd3b..7cd4a8ec3c8f 100644
--- a/drivers/block/zram/Kconfig
+++ b/drivers/block/zram/Kconfig
@@ -13,3 +13,15 @@ config ZRAM
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.