Name Date Size #Lines LOC

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.gitignoreH A D08-Apr-202548

MakefileH A D08-Jan-2018152 105

READMEH A D16-Oct-20251.1 KiB4032

configH A D19-Jul-201632 32

zram.shH A D14-Dec-2022235 1912

zram01.shH A D14-Dec-20221.9 KiB7646

zram02.shH A D14-Dec-20221.2 KiB4520

zram_lib.shH A D14-Dec-20225.4 KiB270214

README

1zram: Compressed RAM based block devices
2----------------------------------------
3* Introduction
4
5The zram module creates RAM based block devices named /dev/zram<id>
6(<id> = 0, 1, ...). Pages written to these disks are compressed and stored
7in memory itself. These disks allow very fast I/O and compression provides
8good amounts of memory savings. Some of the usecases include /tmp storage,
9use as swap disks, various caches under /var and maybe many more :)
10
11Statistics for individual zram devices are exported through sysfs nodes at
12/sys/block/zram<id>/
13
14Kconfig required:
15CONFIG_ZRAM=y
16CONFIG_CRYPTO_LZ4=y
17CONFIG_ZSMALLOC=y
18
19ZRAM Testcases
20--------------
21zram_lib.sh: create library with initialization/cleanup functions
22zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
23
24Two functional tests: zram01 and zram02:
25zram01.sh: creates general purpose ram disks with ext4 filesystems
26zram02.sh: creates block device for swap
27
28Commands required for testing:
29 - bc
30 - dd
31 - free
32 - awk
33 - mkswap
34 - swapon
35 - swapoff
36 - mkfs/ mkfs.ext4
37
38For more information please refer:
39kernel-source-tree/Documentation/admin-guide/blockdev/zram.rst
40