stress_modules.sh

   1 #! /bin/sh
   2
   3 MODULE_DIR=/lib/modules/`uname -r`/kernel
   4
   5 case "$1" in
   6     mount-unmount)
   7         trap "umount $3; rm -f $2; rmdir $3" 0
   8         mkdir $3
   9         dd bs=1204k count=20 if=/dev/zero of=$2
  10         mke2fs -F $2
  11         tune2fs -c 0 $2
  12         modprobe loop
  13         while true; do mount -o loop $2 $3; umount $3; sleep 1; done
  14         ;;
  15     bang-one)
  16         trap "rmmod $2" 0
  17         while true; do modprobe $2; rmmod $2; done
  18         ;;
  19     bang-all)
  20         while true; do
  21             # Randomize order
  22             find $MODULE_DIR -name '*.ko' | ( while read mod; do echo $RANDOM $mod; done ) | sort -n |
  23                 while read junk modname; do
  24                     if [ $RANDOM -gt $RANDOM ]; then
  25                         rmmod `basename $modname .ko`
  26                     else
  27                         modprobe `basename $modname .ko`
  28                     fi
  29                 done
  30         done
  31         ;;
  32     "")
  33         $0 mount-unmount testfs.$$ /tmp/$$ &
  34         $0 bang-one ext2 &
  35         $0 bang-all &
  36         exit 0
  37         ;;
  38     *)
  39         echo Unknown arg "$1"
  40         exit 1
  41         ;;
  42 esac