CONFIG_ZCACHE_WRITEBACK: Allow compressed swap pages to be writtenback to swap disk

General informations

The Linux kernel configuration item CONFIG_ZCACHE_WRITEBACK:

• prompt: Allow compressed swap pages to be writtenback to swap disk
• type: bool
• depends on: CONFIG_ZCACHE = CONFIG_y && CONFIG_BROKEN
• defined in drivers/staging/zcache/Kconfig
• found in Linux kernels: 3.9–3.11

Help text

Zcache caches compressed swap pages (and other data) in RAM which often improves performance by avoiding I/O's due to swapping. In some workloads with very long-lived large processes, it can instead reduce performance. Writeback decompresses zcache-compressed pages (in LRU order) when under memory pressure and writes them to the backing swap disk to ameliorate this problem. Policy driving writeback is still under development.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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