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| author | Emil Muratov <gpm@hotplug.ru> | 2018-08-02 00:15:44 +0300 |
|---|---|---|
| committer | Jo-Philipp Wich <jo@mein.io> | 2018-12-18 17:22:04 +0100 |
| commit | 5ff4ea6bc4d2bff3407e5ec509ff779ccf66782c (patch) | |
| tree | 878d40585d50501c3de21b99040531495dcf7998 | |
| parent | afd6460418dfbe9ed370a4f9ce4a8fb202f4eb7d (diff) | |
| download | upstream-5ff4ea6bc4d2bff3407e5ec509ff779ccf66782c.tar.gz upstream-5ff4ea6bc4d2bff3407e5ec509ff779ccf66782c.tar.bz2 upstream-5ff4ea6bc4d2bff3407e5ec509ff779ccf66782c.zip | |
zram-swap: compression algorithm configuration option
Compression algorithms for zram are provided by kernel crypto API, could
be any of [lzo|zl4|deflate|<some_more>] depending on kernel modules.
Compress algo for zram-swap could be defined via 'zram_comp_algo' option
in 'system' section of '/etc/config/system' file, or via cli (for e.x.
with 'uci set system.@System[0].zram_comp_algo=lz4 && uci commit
system'). check available algo's via 'cat /sys/block/zram0
/comp_algorithm'
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
(backported from b9e89adfb7881806d01e3bd259852e352f3b3ce8)
| -rw-r--r-- | package/system/zram-swap/files/zram.init | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init index 63a20479d1..419221b1a3 100644 --- a/package/system/zram-swap/files/zram.init +++ b/package/system/zram-swap/files/zram.init @@ -69,6 +69,23 @@ zram_reset() echo "1" >"$proc_entry" } +zram_comp_algo() +{ + local dev="$1" + local zram_comp_algo="$( uci -q get system.@system[0].zram_comp_algo )" + + if [ -z "$zram_comp_algo" ] || [ ! -e /sys/block/$( basename $dev )/comp_algorithm ]; then + return 0 + fi + + if [ `grep -c "$zram_comp_algo" /sys/block/$( basename $dev )/comp_algorithm` -ne 0 ]; then + logger -s -t zram_comp_algo -p daemon.debug "Set compression algorithm '$zram_comp_algo' for zram '$dev'" + echo $zram_comp_algo > "/sys/block/$( basename $dev )/comp_algorithm" + else + logger -s -t zram_comp_algo -p daemon.debug "Compression algorithm '$zram_comp_algo' is not supported for '$dev'" + fi +} + list_cpu_idx() { # Offset by 1 if /dev/zram0 is in use by /tmp @@ -108,6 +125,7 @@ start() zram_reset "$zram_dev" "enforcing defaults" echo $(( zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize" + zram_comp_algo "$zram_dev" mkswap "$zram_dev" swapon "$zram_dev" } done |