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| -rw-r--r-- | README | 29 |
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@@ -0,0 +1,29 @@ +zram: Compressed RAM based block devices +---------------------------------------- +* Introduction + +The zram module creates RAM based block devices named /dev/zram<id> +(<id> = 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. Some of the usecases include /tmp storage, +use as swap disks, various caches under /var and maybe many more :) + +Statistics for individual zram devices are exported through sysfs nodes at +/sys/block/zram<id>/ + +ZRAM Testcases +-------------- +zram_lib.sh: create library with initialization/cleanup functions + +Two functional tests: zram01 and zram02: +zram01.sh: creates general purpose ram disks with ext4 filesystems +zram02.sh: creates block device for swap + +Kconfig required: +CONFIG_ZRAM=y +CONFIG_ZRAM_LZ4_COMPRESS=y +CONFIG_ZPOOL=y +CONFIG_ZSMALLOC=y + +For more information please refer: +kernel-source-tree/Documentation/blockdev/zram.txt |