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kernelswapon-openwrt.patch
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kernelswapon-openwrt.patch
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diff --git a/package/system/zram-swap/files/zram.init b/package/system/zram-swap/files/zram.init
index ae432f3b00..049c42c198 100755
--- a/package/system/zram-swap/files/zram.init
+++ b/package/system/zram-swap/files/zram.init
@@ -1,215 +1,19 @@
#!/bin/sh /etc/rc.common
-
-START=15
-
-EXTRA_COMMANDS="compact status"
-EXTRA_HELP=" compact trigger compaction for all Z-RAM swap dev's
- status print out status information & statistics about Z-RAM swap devices"
-
-ram_getsize()
-{
- local line
-
- while read line; do case "$line" in MemTotal:*) set $line; echo "$2"; break ;; esac; done </proc/meminfo
-}
-
-zram_getsize() # in megabytes
-{
- local zram_size="$( uci -q get system.@system[0].zram_size_mb )"
- local ram_size="$( ram_getsize )"
-
- if [ -z "$zram_size" ]; then
- # e.g. 6mb for 16mb-routers or 61mb for 128mb-routers
- echo $(( ram_size / 2048 ))
- else
- echo "$zram_size"
- fi
-}
-
-zram_applicable()
-{
- local zram_dev="$1"
-
- [ -e "$zram_dev" ] || {
- logger -s -t zram_applicable -p daemon.crit "[ERROR] device '$zram_dev' not found"
- return 1
- }
-
- which mkswap >/dev/null || {
- logger -s -t zram_applicable -p daemon.err "[ERROR] 'mkswap' not installed"
- return 1
- }
-
- which swapon >/dev/null || {
- logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapon' not installed"
- return 1
- }
-
- which swapoff >/dev/null || {
- logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapoff' not installed"
- return 1
- }
-}
-
-zram_dev()
-{
- local idx="$1"
- echo "/dev/zram${idx:-0}"
-}
-
-zram_reset()
-{
- local dev="$1"
- local message="$2"
- local proc_entry="/sys/block/$( basename "$dev" )/reset"
-
- logger -s -t zram_reset -p daemon.debug "$message via $proc_entry"
- echo "1" >"$proc_entry"
-}
-
-zram_getdev()
-{
- #get unallocated zram dev
- local zdev=$( zram_dev )
-
- if [ "$(mount | grep $zdev)" ]; then
- local idx=`cat /sys/class/zram-control/hot_add`
- zdev="$( zram_dev $idx )"
- fi
-
- echo $zdev
-}
-
-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
-}
-
-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 $dev )/max_comp_streams
- fi
-}
-
-#print various stats info about zram swap device
-zram_stats()
-{
- local zdev="/sys/block/$( basename "$1" )"
-
- printf "\nGathering stats info for zram device \"$( basename "$1" )\"\n\n"
-
- printf "Z-RAM\n-----\n"
- printf "%-25s - %s\n" "Block device" $zdev
- awk '{ printf "%-25s - %d MiB\n", "Device size", $1/1024/1024 }' <$zdev/disksize
- printf "%-25s - %s\n" "Compression algo" "$(cat $zdev/comp_algorithm)"
- printf "%-25s - %s\n" "Compression streams" "$( cat $zdev/max_comp_streams)"
-
- awk 'BEGIN { fmt = "%-25s - %.2f %s\n"
- fmt2 = "%-25s - %d\n"
- print "\nDATA\n----" }
- { printf fmt, "Original data size", $1/1024/1024, "MiB"
- printf fmt, "Compressed data size", $2/1024/1024, "MiB"
- printf fmt, "Compress ratio", $1/$2, ""
- print "\nMEMORY\n------"
- printf fmt, "Memory used, total", $3/1024/1024, "MiB"
- printf fmt, "Allocator overhead", ($3-$2)/1024/1024, "MiB"
- printf fmt, "Allocator efficiency", $2/$3*100, "%"
- printf fmt, "Maximum memory ever used", $5/1024/1024, "MiB"
- printf fmt, "Memory limit", $4/1024/1024, "MiB"
- print "\nPAGES\n-----"
- printf fmt2, "Same pages count", $6
- printf fmt2, "Pages compacted", $7 }' <$zdev/mm_stat
-
- awk '{ printf "%-25s - %d\n", "Free pages discarded", $4 }' <$zdev/io_stat
-}
-
-zram_compact()
-{
- # compact zram device (reduce memory allocation overhead)
- local zdev="/sys/block/$( basename "$1" )"
-
- local old_mem_used=`awk '{print $3}' <$zdev/mm_stat`
- local old_overhead=`awk '{print $3-$2}' <$zdev/mm_stat`
-
- echo 1 > $zdev/compact
-
- # If not running interactively, than just return
- [ -z "$PS1" ] && return 0
-
- echo ""
- echo "Compacting zram device $zdev"
- awk -v old_mem="$old_mem_used" -v ovr="$old_overhead" 'BEGIN { fmt = "%-25s - %.1f %s\n" }
- { printf fmt, "Memory usage reduced by ", (old_mem-$3)/1024/1024, "MiB"
- printf fmt, "Overhead reduced by", (ovr-($3-$2))/ovr*100, "%" }' <$zdev/mm_stat
-}
-
-start()
-{
- if [ $( grep -cs zram /proc/swaps ) -ne 0 ]; then
- logger -s -t zram_start -p daemon.notice "[OK] zram swap is already mounted"
- return 1
- fi
-
- local zram_size="$( zram_getsize )"
- local zram_dev="$( zram_getdev )"
- zram_applicable "$zram_dev" || return 1
-
- logger -s -t zram_start -p daemon.debug "activating '$zram_dev' for swapping ($zram_size MegaBytes)"
-
- 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"
-}
-
-stop()
-{
- local zram_dev
-
- for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do {
- logger -s -t zram_stop -p daemon.debug "deactivate swap $zram_dev"
- swapoff "$zram_dev" && zram_reset "$zram_dev" "claiming memory back"
- local dev_index="$( echo $zram_dev | grep -o "[0-9]*$" )"
- if [ $dev_index -ne 0 ]; then
- logger -s -t zram_stop -p daemon.debug "removing zram $zram_dev"
- echo $dev_index > /sys/class/zram-control/hot_remove
- fi
- } done
-}
-
-# show memory stats for all zram swaps
-status()
-{
- for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do {
- zram_stats "$zram_dev"
- } done
-}
-
-# trigger compaction for all zram swaps
-compact()
-{
- for zram_dev in $( grep zram /proc/swaps |awk '{print $1}' ); do {
- zram_compact "$zram_dev"
- } done
-}
+START=15;EXTRA_COMMANDS="compact status";EXTRA_HELP=" compact trigger compaction for all Z-RAM swap dev's
+ status print out status information & statistics about Z-RAM swap devices";ram_getsize(){ local line;while read line;do case "$line" in MemTotal:*)set $line;echo "$2";break;;esac;done</proc/meminfo;};zram_getsize(){ local zram_size="$(uci -q get system.@system[0].zram_size_mb)";local ram_size="$(ram_getsize)";if [ -z "$zram_size" ];then echo $(((ram_size / 2048)- 5));else echo "$zram_size";fi;};zram_applicable(){ local zram_dev="$1";[ -e "$zram_dev" ]||{ logger -s -t zram_applicable -p daemon.crit "[ERROR] device '$zram_dev' not found";return 1;};which mkswap>/dev/null||{ logger -s -t zram_applicable -p daemon.err "[ERROR] 'mkswap' not installed";return 1;};which swapon>/dev/null||{ logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapon' not installed";return 1;};which swapoff>/dev/null||{ logger -s -t zram_applicable -p daemon.err "[ERROR] 'swapoff' not installed";return 1;};};zram_dev(){ local idx="$1";echo "/dev/zram${idx:-0}";};zram_reset(){ local dev="$1";local message="$2";local proc_entry="/sys/block/$(basename "$dev")/reset";logger -s -t zram_reset -p daemon.debug "$message via $proc_entry";echo "1">"$proc_entry";};zram_getdev(){ local zdev=$(zram_dev);if [ "$(mount|grep $zdev)" ];then local idx=`cat /sys/class/zram-control/hot_add`;zdev="$(zram_dev $idx)";fi;echo $zdev;};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;};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 $dev)/max_comp_streams;fi;};zram_stats(){ local zdev="/sys/block/$(basename "$1")";printf "\nGathering stats info for zram device \"$(basename "$1")\"\n\n";printf "Z-RAM\n-----\n";printf "%-25s - %s\n" "Block device" $zdev;awk '{ printf "%-25s - %d MiB\n", "Device size", $1/1024/1024 }'<$zdev/disksize;printf "%-25s - %s\n" "Compression algo" "$(cat $zdev/comp_algorithm)";printf "%-25s - %s\n" "Compression streams" "$(cat $zdev/max_comp_streams)";awk 'BEGIN { fmt = "%-25s - %.2f %s\n"
+fmt2 = "%-25s - %d\n"
+print "\nDATA\n----" }
+{ printf fmt, "Original data size", $1/1024/1024, "MiB"
+printf fmt, "Compressed data size", $2/1024/1024, "MiB"
+printf fmt, "Compress ratio", $1/$2, ""
+print "\nMEMORY\n------"
+printf fmt, "Memory used, total", $3/1024/1024, "MiB"
+printf fmt, "Allocator overhead",($3-$2)/1024/1024, "MiB"
+printf fmt, "Allocator efficiency", $2/$3*100, "%"
+printf fmt, "Maximum memory ever used", $5/1024/1024, "MiB"
+printf fmt, "Memory limit", $4/1024/1024, "MiB"
+print "\nPAGES\n-----"
+printf fmt2, "Same pages count", $6
+printf fmt2, "Pages compacted", $7 }'<$zdev/mm_stat;awk '{ printf "%-25s - %d\n", "Free pages discarded", $4 }'<$zdev/io_stat;};zram_compact(){ local zdev="/sys/block/$(basename "$1")";local old_mem_used=`awk '{print $3}'<$zdev/mm_stat`;local old_overhead=`awk '{print $3-$2}'<$zdev/mm_stat`;echo 1>$zdev/compact;[ -z "$PS1" ]&&return 0;echo "";echo "Compacting zram device $zdev";awk -v old_mem="$old_mem_used" -v ovr="$old_overhead" 'BEGIN { fmt = "%-25s - %.1f %s\n" }
+{ printf fmt, "Memory usage reduced by ",(old_mem-$3)/1024/1024, "MiB"
+printf fmt, "Overhead reduced by",(ovr-($3-$2))/ovr*100, "%" }'<$zdev/mm_stat;};start(){ if [ $(grep -cs zram /proc/swaps)-ne 0 ];then logger -s -t zram_start -p daemon.notice "[OK] zram swap is already mounted";return 1;fi;local zram_size="$(zram_getsize)";local zram_dev="$(zram_getdev)";zram_applicable "$zram_dev"||return 1;logger -s -t zram_start -p daemon.debug "activating '$zram_dev' for swapping ($zram_size MegaBytes)";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";};stop(){ local zram_dev;for zram_dev in $(grep zram /proc/swaps|awk '{print $1}');do { logger -s -t zram_stop -p daemon.debug "deactivate swap $zram_dev";swapoff "$zram_dev"&&zram_reset "$zram_dev" "claiming memory back";local dev_index="$(echo $zram_dev|grep -o "[0-9]*$")";if [ $dev_index -ne 0 ];then logger -s -t zram_stop -p daemon.debug "removing zram $zram_dev";echo $dev_index>/sys/class/zram-control/hot_remove;fi;} done;};status(){ for zram_dev in $(grep zram /proc/swaps|awk '{print $1}');do { zram_stats "$zram_dev";} done;};compact(){ for zram_dev in $(grep zram /proc/swaps|awk '{print $1}');do { zram_compact "$zram_dev";} done;}