config/chroot_local-includes/usr/share/initramfs-tools/scripts/init-premount/sdmem

   1 #!/bin/sh
   2
   3 PREREQ=""
   4
   5 prereqs() {
   6    echo "${PREREQ}"
   7 }
   8
   9 tweak_sysctl() {
  10    echo 3   > /proc/sys/kernel/printk
  11
  12    echo 3   > /proc/sys/vm/drop_caches
  13    echo 256 > /proc/sys/vm/min_free_kbytes
  14
  15    echo 1   > /proc/sys/vm/overcommit_memory
  16    echo 1   > /proc/sys/vm/oom_kill_allocating_task
  17    echo 0   > /proc/sys/vm/oom_dump_tasks
  18 }
  19
  20 case ${1} in
  21    prereqs)
  22       prereqs
  23       exit 0
  24       ;;
  25 esac
  26
  27 if [ -n "${sdmem}" ] ; then
  28    tweak_sysctl
  29    if [ -z "${sdmemopts}" ] ; then
  30       sdmemopts="v"
  31    fi
  32    for i in $(seq 0 30) ; do /usr/bin/sdmem "-${sdmemopts}" & done
  33    # Wait for at least one sdmem job to complete.
  34    /usr/bin/sdmem "-${sdmemopts}"
  35 fi
  36
  37 case "${sdmem}" in
  38    halt)
  39       /sbin/halt -fndp
  40       ;;
  41    reboot)
  42       /sbin/reboot -fnd
  43       ;;
  44    *)
  45       ;;
  46 esac