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 <gpm@hotplug.ru>
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@ -93,6 +93,19 @@ zram_comp_algo()
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fi
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}
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zram_comp_streams()
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{
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local dev="$1"
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local logical_cpus=$( grep -ci "^processor" /proc/cpuinfo )
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[ $logical_cpus -gt 1 ] || return 1
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local zram_comp_streams="$( uci -q get system.@system[0].zram_comp_streams )"
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[ -n "$zram_comp_streams" ] && [ "$zram_comp_streams" -le "$logical_cpus" ] || zram_comp_streams=$logical_cpus
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if [ -e /sys/block/$( basename $dev )/max_comp_streams ]; then
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logger -s -t zram_comp_streams -p daemon.debug "Set max compression streams to '$zram_comp_streams' for zram '$dev'"
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echo $zram_comp_streams > /sys/block/$( basename $dev )/max_comp_streams
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fi
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}
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start()
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{
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local zram_size="$( zram_size )"
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@ -110,6 +123,7 @@ start()
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zram_reset "$zram_dev" "enforcing defaults"
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zram_comp_algo "$zram_dev"
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zram_comp_streams "$zram_dev"
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echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize"
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mkswap "$zram_dev"
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swapon "$zram_dev"
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