From 24326581281361f0d66f8bd40ac4c598d16fbc4b Mon Sep 17 00:00:00 2001 From: Emil Muratov Date: Thu, 2 Aug 2018 01:05:14 +0300 Subject: [PATCH] zram-swap: Add "max compression streams" configuration option Config option to limit maximum compression streams per zram dev for multicore CPU's. This could be defined via 'zram_comp_streams' option in the 'system' section of '/etc/config/system' file or via cli (for e.x. with 'uci set system.@System[0].zram_comp_streams=2 && uci commit system'). Default is number of logical CPU cores. Signed-off-by: Emil Muratov (backported from 70d3ffb47fcef901e4d86da4c9077ba8b8e2ba10) --- package/system/zram-swap/files/zram.init | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init index 2db986f9a8..9fd4089c6b 100755 --- a/package/system/zram-swap/files/zram.init +++ b/package/system/zram-swap/files/zram.init @@ -93,6 +93,19 @@ zram_comp_algo() fi } +zram_comp_streams() +{ + local dev="$1" + local logical_cpus=$( grep -ci "^processor" /proc/cpuinfo ) + [ $logical_cpus -gt 1 ] || return 1 + local zram_comp_streams="$( uci -q get system.@system[0].zram_comp_streams )" + [ -n "$zram_comp_streams" ] && [ "$zram_comp_streams" -le "$logical_cpus" ] || zram_comp_streams=$logical_cpus + if [ -e /sys/block/$( basename $dev )/max_comp_streams ]; then + logger -s -t zram_comp_streams -p daemon.debug "Set max compression streams to '$zram_comp_streams' for zram '$dev'" + echo $zram_comp_streams > /sys/block/$( basename $dev )/max_comp_streams + fi +} + start() { local zram_size="$( zram_size )" @@ -110,6 +123,7 @@ start() zram_reset "$zram_dev" "enforcing defaults" zram_comp_algo "$zram_dev" + zram_comp_streams "$zram_dev" echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize" mkswap "$zram_dev" swapon "$zram_dev" -- 2.25.1