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MakefileD22-Nov-2023152 105

READMED22-Nov-20231.1 KiB4133

configD22-Nov-202332 32

zram.shD23-Nov-2023600 3222

zram01.shD22-Nov-20232.6 KiB10056

zram02.shD22-Nov-20231.6 KiB5521

zram_lib.shD23-Nov-20234.9 KiB237180

README

1 zram: Compressed RAM based block devices
2 ----------------------------------------
3 * Introduction
4 
5 The zram module creates RAM based block devices named /dev/zram<id>
6 (<id> = 0, 1, ...). Pages written to these disks are compressed and stored
7 in memory itself. These disks allow very fast I/O and compression provides
8 good amounts of memory savings. Some of the usecases include /tmp storage,
9 use as swap disks, various caches under /var and maybe many more :)
10 
11 Statistics for individual zram devices are exported through sysfs nodes at
12 /sys/block/zram<id>/
13 
14 Kconfig required:
15 CONFIG_ZRAM=y
16 CONFIG_CRYPTO_LZ4=y
17 CONFIG_ZPOOL=y
18 CONFIG_ZSMALLOC=y
19 
20 ZRAM Testcases
21 --------------
22 zram_lib.sh: create library with initialization/cleanup functions
23 zram.sh: For sanity check of CONFIG_ZRAM and to run zram01 and zram02
24 
25 Two functional tests: zram01 and zram02:
26 zram01.sh: creates general purpose ram disks with ext4 filesystems
27 zram02.sh: creates block device for swap
28 
29 Commands required for testing:
30  - bc
31  - dd
32  - free
33  - awk
34  - mkswap
35  - swapon
36  - swapoff
37  - mkfs/ mkfs.ext4
38 
39 For more information please refer:
40 kernel-source-tree/Documentation/blockdev/zram.txt
41