external/gpl2/lvm2/dist/test/t-read-ahead.sh

   1 #!/bin/sh
   2 # Copyright (C) 2008 Red Hat, Inc. All rights reserved.
   3 #
   4 # This copyrighted material is made available to anyone wishing to use,
   5 # modify, copy, or redistribute it subject to the terms and conditions
   6 # of the GNU General Public License v.2.
   7 #
   8 # You should have received a copy of the GNU General Public License
   9 # along with this program; if not, write to the Free Software Foundation,
  10 # Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  11
  12 #
  13 # tests basic functionality of read-ahead and ra regressions
  14 #
  15
  16 test_description='Test read-ahead functionality'
  17
  18 . ./test-utils.sh
  19
  20
  21 get_lvs_() {
  22    lvs --units s --nosuffix --noheadings -o $1 "$vg"/"$lv"
  23 }
  24
  25 check_lvs_() {
  26    case $(get_lvs_ $1) in
  27     *$2) true ;;
  28     *) false ;;
  29    esac
  30 }
  31
  32 aux prepare_vg 5
  33
  34 #COMM "test various read ahead settings (bz450922)"
  35 lvcreate -n "$lv" -l 100%FREE -i5 -I256 "$vg"
  36 ra="$(get_lvs_ lv_kernel_read_ahead)"
  37 test "$(( ( $ra / 5 ) * 5 ))" -eq $ra
  38 lvdisplay "$vg"/"$lv"
  39 lvchange -r auto "$vg"/"$lv" 2>&1 | grep auto
  40 check_lvs_ lv_read_ahead auto
  41 check_lvs_ lv_kernel_read_ahead 5120
  42 lvchange -r 640 "$vg/$lv"
  43 check_lvs_ lv_read_ahead 640
  44 lvremove -ff "$vg"
  45
  46 #COMM "read ahead is properly inherited from underlying PV"
  47 blockdev --setra 768 $dev1
  48 lvcreate -n $lv -L4m $vg $dev1
  49 test $(blockdev --getra $G_dev_/$vg/$lv) -eq 768
  50 lvremove -ff $vg
  51
  52 # Check default, active/inactive values for read_ahead / kernel_read_ahead
  53 lvcreate -n $lv -l 50%FREE $vg
  54 lvchange -an $vg/$lv
  55 check_lv_field_ $vg/$lv lv_read_ahead auto
  56 check_lv_field_ $vg/$lv lv_kernel_read_ahead -1
  57 lvchange -r 512 $vg/$lv
  58 lvchange -ay $vg/$lv
  59 check_lv_field_ $vg/$lv lv_read_ahead 256.00k
  60 check_lv_field_ $vg/$lv lv_kernel_read_ahead 256.00k
  61 lvremove -ff $vg