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zram: tweak writeback config help

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Writeback is for incompressible and idle zram pages.

Link: https://lkml.kernel.org/r/20231115024223.4133148-2-senozhatsky@chromium.org
Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Dmytro Maluka <dmaluka@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Sergey Senozhatsky 2023-11-15 11:42:13 +09:00 committed by Andrew Morton
parent a7a0350583
commit 2e16898d0d
1 changed files with 2 additions and 2 deletions
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drivers/block/zram/Kconfig
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@ -59,8 +59,8 @@ config ZRAM_WRITEBACK
bool "Write back incompressible or idle page to backing device"
depends on ZRAM
help
With incompressible page, there is no memory saving to keep it
in memory. Instead, write it out to backing device.
This lets zram entries (incompressible or idle pages) be written
back to a backing device, helping save memory.
For this feature, admin should set up backing device via
/sys/block/zramX/backing_dev.