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CONFIG_ZRAM_WRITEBACK: Write back incompressible page to backing device

General informations

The Linux kernel configuration item CONFIG_ZRAM_WRITEBACK has multiple definitions:

Write back incompressible or idle page to backing device found in drivers/block/zram/Kconfig

The configuration item CONFIG_ZRAM_WRITEBACK:

Help text

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.

With /sys/block/zramX/{idle,writeback}, application could ask idle page's writeback to the backing device to save in memory.

See Documentation/blockdev/zram.txt for more information.

Write back incompressible page to backing device found in drivers/block/zram/Kconfig

The configuration item CONFIG_ZRAM_WRITEBACK:

Help text

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 Documentation/blockdev/zram.txt for more information.

Hardware

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