diff options
Diffstat (limited to 'recipes-core/udev/files/hotplug.sh')
| -rw-r--r-- | recipes-core/udev/files/hotplug.sh | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/recipes-core/udev/files/hotplug.sh b/recipes-core/udev/files/hotplug.sh new file mode 100644 index 0000000..b34c2a3 --- /dev/null +++ b/recipes-core/udev/files/hotplug.sh @@ -0,0 +1,48 @@ +#!/bin/sh +# +# Called from udev +# +# Set the read_ahead cache size of SD card on hotplug + +SYSNAME=$(uname -n) +DISKNUM=$(echo $DEVNAME | sed -e 's/\(^.*\)\(.$\)/\2/') +DISKNAME=$(echo $DEVNAME | sed 's/.*\///g;s/p.*//g') +CORES=$(cat /proc/cpuinfo | grep processor | wc -l) + +set_read_ahead_size () { + if [ $DISKNUM == "0" ]; then #eMMC + echo $1 > /sys/block/$DISKNAME/queue/read_ahead_kb + else #SD card + echo $2 > /sys/block/$DISKNAME/queue/read_ahead_kb + fi +} + +if [ "$ACTION" = "add" ] && [ -n "$DEVNAME" ] && [ "$DEVTYPE" = "disk" ]; then + #Set read_ahead cache of mmcblk? SD card + if test -e /sys/block/$DISKNAME/queue/read_ahead_kb + then + if [ $SYSNAME == "colibri-imx6" ]; then + if [ $CORES -eq 1 ]; then #imx6s + set_read_ahead_size 512 512 + else #imx6dl + set_read_ahead_size 1024 512 + fi + elif [ $SYSNAME == "colibri-t30" ]; then + set_read_ahead_size 2048 1024 + elif [ $SYSNAME == "apalis-imx6" ]; then + if [ $CORES -eq 2 ]; then #imx6d + set_read_ahead_size 1024 512 + else #imx6q + set_read_ahead_size 1024 512 + fi + elif [ $SYSNAME == "apalis-t30" ]; then + set_read_ahead_size 4096 1024 + elif [ $SYSNAME == "apalis-tk1" ]; then + set_read_ahead_size 4096 1024 + else + logger "sd_hotplug.sh" "System name not compatible" + fi + else + logger "sd_hotplug" "No read_ahead_kb configuration file found" + fi +fi |