Use only one zram swap device of the specified $size instead of
[N x $size] devices for multicore CPUs Now zram module uses multiple
compression streams for each dev by default, so we do not need to create
several zram devs to utilize multicore CPUs.
Signed-off-by: Emil Muratov <gpm@hotplug.ru>
(backported from
814cae7362c3bd57e8fd9305d5d0b48ff219d4d0)
- grep -sq ^"$zram_dev " /proc/swaps && {
- logger -s -t zram_applicable -p daemon.notice "[OK] '$zram_dev' already active"
- return 1
- }
-
[ -e "$zram_dev" ] || {
logger -s -t zram_applicable -p daemon.crit "[ERROR] device '$zram_dev' not found"
return 1
[ -e "$zram_dev" ] || {
logger -s -t zram_applicable -p daemon.crit "[ERROR] device '$zram_dev' not found"
return 1
- local core="$1"
-
- echo "/dev/zram${core:-0}"
+ local idx="$1"
+ echo "/dev/zram${idx:-0}"
echo "1" >"$proc_entry"
}
echo "1" >"$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"
zram_comp_algo()
{
local dev="$1"
-list_cpu_idx()
-{
- # Offset by 1 if /dev/zram0 is in use by /tmp
- if mount | grep -q /dev/zram0; then
- local line i=1
- # Hot-add new ZRAM device (if necessary)
- if [ ! -b /dev/zram1 ]; then
- cat /sys/class/zram-control/hot_add
- fi
- else
- local line i=0
- fi
-
- while read line; do {
- case "$line" in
- [Pp]rocessor*)
- echo $i
- i=$(( i + 1 ))
- ;;
- esac
- } done <"/proc/cpuinfo"
-}
-
- # http://shmilyxbq-compcache.googlecode.com/hg/README
- # if >1 cpu_core, reinit kmodule with e.g. num_devices=4
-
local zram_size="$( zram_size )"
local zram_size="$( zram_size )"
- for core in $( list_cpu_idx ); do {
- zram_dev="$( zram_dev "$core" )"
- zram_applicable "$zram_dev" || return 1
+ if [ $( grep -cs zram /proc/swaps ) -ne 0 ]; then
+ logger -s -t zram_start -p daemon.notice "[OK] zram swap is already mounted"
+ return 1
+ fi
- logger -s -t zram_start -p daemon.debug "activating '$zram_dev' for swapping ($zram_size MegaBytes)"
+ zram_dev="$( zram_getdev )"
+ zram_applicable "$zram_dev" || return 1
- zram_reset "$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
+ 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"
+ echo $(( $zram_size * 1024 * 1024 )) >"/sys/block/$( basename "$zram_dev" )/disksize"
+ mkswap "$zram_dev"
+ swapon "$zram_dev"