From mboxrd@z Thu Jan  1 00:00:00 1970
From: Teck Choon Giam <giamteckchoon@gmail.com>
Subject: Re: kernel BUG at arch/x86/xen/mmu.c:1860!
Date: Sat, 15 Jan 2011 03:25:55 +0800
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On Fri, Jan 14, 2011 at 11:20 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Wed, Dec 29, 2010 at 12:58:15PM +0800, Teck Choon Giam wrote:
> > Below is my latest test crash script:
>
> This test script is still valid? Or do you have a more updated one?
>

Below is the more updated one.  Please note that this will mostly not
support VG in CLVM since clustered LVM doesn't support snapshot in my CentOS
5 testing... ...

----------8<----------8<----------8<----------8<----------8<----------8<----------8<----------8<----------8<----------
#!/bin/sh
#
# This script is to create lvm snapshot, mount it, umount it and remove in a
# specified number of loops to test whether it will crash the host server.
# All LVM snapshots assumed can be mounted like if you are running a PV
domU.
#
# Created by Giam Teck Choon
#

# The LV name and for this case we are using the first in vgdisplay output.
# Change the variable if you want other VG Name or change head -n 1 to
# tail -n 1 if you prefer to use last VG instead of first if you happen to
have
# more than one VG
LVGroupName=`vgdisplay | grep 'VG Name' | awk '{print $3}' | head -n 1`

if [ ! -n "$LVGroupName" ] && [ ! -d "/dev/${LVGroupName}" ] ; then
    echo "Unable to detect VG Name!"
    exit 1
fi

# return 1 if is mounted otherwise return 0
check_mount() {
    local checkdir=${1}
    if [ -n "$checkdir" ] ; then
        local check=`grep "$checkdir" /proc/mounts`
        if [ -n "$check" ] ; then
            return 1
        fi
    fi
    return 0
}

# We will create 5 testcrash LV in $LVGroupName each with 5GB size
# and format it as ext3
do_lvm_create_testcrash() {
    local lvname=${1:-testcrash}
    local lvsize=${2:-5G}
    local count=1
    local limit=5
    while [ "$count" -le "$limit" ]
    do
        if [ ! -h "/dev/${LVGroupName}/${lvname}${count}" ] ; then
            echo "lvcreate -v -n ${lvname}${count} -L ${lvsize}
${LVGroupName} ... ... "
            lvcreate -v -n ${lvname}${count} -L ${lvsize} ${LVGroupName}
            echo "lvcreate -v -n ${lvname}${count} -L ${lvsize}
${LVGroupName} completed!"
            if [ -h "/dev/${LVGroupName}/${lvname}${count}" ] ; then
                echo "mke2fs -F -j /dev/${LVGroupName}/${lvname}${count} ...
... "
                mke2fs -F -j /dev/${LVGroupName}/${lvname}${count}
                echo "mke2fs -F -j /dev/${LVGroupName}/${lvname}${count}
completed!"
            else
                echo "/dev/${LVGroupName}/${lvname}${count} not found!"
            fi
        fi
        count=`expr $count + 1`
    done
}

do_lvm_create_remove() {
    # number of loops default is 1
    local loopcountlimit=${1:-1}
    # snapshot size default is 1G
    local snapshotsize=${2:-1G}
    # implement a sleep between create, mount, umount and remove (default is
0 which is no pause)
    local pauseinterval=${3:-0}
    # execute commands after each pause/sleep such as sync or anything that
you want to test
    local commands=${4}
    # We filter out snapshot and swap
    local count=0
    if [ -d "/dev/${LVGroupName}" ] ; then
        while [ "$count" -lt "$loopcountlimit" ]
        do
            count=`expr $count + 1`
            echo "${count} ... ... "
            for i in `ls /dev/${LVGroupName} | grep -Ev 'snapshot$' | grep
-Ev 'swap$'`; do
                if [ -h "/dev/${LVGroupName}/${i}" ] ; then
                    echo -n "lvcreate -s -v -n ${i}-snapshot -L
${snapshotsize} /dev/${LVGroupName}/${i} ... ... "
                    lvcreate -s -v -n ${i}-snapshot -L ${snapshotsize}
/dev/${LVGroupName}/${i}
                    echo "done."
                    sleep ${pauseinterval}
                    if [ -n "$commands" ] ; then
                        echo -n "${commands} ... ... "
                        $commands
                        echo "done."
                    fi
                    mkdir -p /mnt/testlvm/${i}
                    if [ -h "/dev/${LVGroupName}/${i}-snapshot" ] ; then
                        check_mount /mnt/testlvm/${i}
                        local ismount=$?
                        if [ "$ismount" -eq 0 ] ; then
                            echo -n "mount /dev/${LVGroupName}/${i}-snapshot
/mnt/testlvm/${i} ... ... "
                            mount /dev/${LVGroupName}/${i}-snapshot
/mnt/testlvm/${i}
                            echo "done."
                            sleep ${pauseinterval}
                            if [ -n "$commands" ] ; then
                                echo -n "${commands} ... ... "
                                $commands
                                echo "done."
                            fi
                        fi
                        check_mount /mnt/testlvm/${i}
                        local ismount2=$?
                        if [ "$ismount2" -eq 1 ] ; then
                            echo -n "umount /mnt/testlvm/${i} ... ... "
                            umount /mnt/testlvm/${i}
                            echo "done."
                            sleep ${pauseinterval}
                            if [ -n "$commands" ] ; then
                                echo -n "${commands} ... ... "
                                $commands
                                echo "done."
                            fi
                        fi
                    fi
                    rm -rf /mnt/testlvm/${i}
                    echo -n "lvremove -f /dev/${LVGroupName}/${i}-snapshot
... ... "
                    lvremove -f /dev/${LVGroupName}/${i}-snapshot
                    echo "done."
                    sleep ${pauseinterval}
                    if [ -n "$commands" ] ; then
                        echo -n "${commands} ... ... "
                        $commands
                        echo "done."
                    fi
                fi
            done
            rm -fr /mnt/testlvm
        done
    else
        echo "/dev/${LVGroupName} directory not found!"
        exit 1
    fi
}

case $1 in
    setup)    shift
        do_lvm_create_testcrash "$@"
        ;;
    loop)    shift
        do_lvm_create_remove "$@"
        ;;
    *)    cat <<HELP
Usage: $0 loop loopcountlimit snapshotsize pauseinterval commands
Where:
    loopcountlimit is default to 1
    snapshotsize is default to 1G
    pauseinterval is default to 0
    commands is default to none

Example to run with 100 loops without pause/sleep:
    $0 loop 100

Example to run with 100 loops with pause/sleep of 5 seconds:
    $0 loop 100 1G 5

Example to run with 100 loops with snapshot size of 2G instead of 1G:
    $0 loop 100 2G

Example to run with 50 loops, 1G snapshot size, 5 seconds pause and with
sync:
command with each pause/sleep
    $0 loop 50 1G 5 sync

Example to run your own commands:
    $0 loop 100 1G 5 "echo hi && sync"

If this is the first time you are running and do not have any LV in your VG,
run:
    $0 setup
This will create 5 testcrash LV in your VG with 5GB size each (default) and
format
to ext3.

HELP
        ;;
esac

----------8<----------8<----------8<----------8<----------8<----------8<----------8<----------8<----------8<----------


Thanks.

Kindest regards,
Giam Teck Choon

--0015175caaae38ad370499d367bf
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<br><br><div class=3D"gmail_quote">On Fri, Jan 14, 2011 at 11:20 PM, Konrad=
 Rzeszutek Wilk <span dir=3D"ltr">&lt;<a href=3D"mailto:konrad.wilk@oracle.=
com">konrad.wilk@oracle.com</a>&gt;</span> wrote:<br><blockquote class=3D"g=
mail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(=
204, 204, 204); padding-left: 1ex;">
<div class=3D"im">On Wed, Dec 29, 2010 at 12:58:15PM +0800, Teck Choon Giam=
 wrote:<br>
&gt; Below is my latest test crash script:<br>
<br>
</div>This test script is still valid? Or do you have a more updated one?<b=
r></blockquote><div><br>Below is the more updated one.=A0 Please note that =
this will mostly not support VG in CLVM since clustered LVM doesn&#39;t sup=
port snapshot in my CentOS 5 testing... ... <br>
</div><div><br>----------8&lt;----------8&lt;----------8&lt;----------8&lt;=
----------8&lt;----------8&lt;----------8&lt;----------8&lt;----------8&lt;=
----------<br>#!/bin/sh<br>#<br># This script is to create lvm snapshot, mo=
unt it, umount it and remove in a<br>
# specified number of loops to test whether it will crash the host server.<=
br># All LVM snapshots assumed can be mounted like if you are running a PV =
domU.<br>#<br># Created by Giam Teck Choon<br>#<br><br># The LV name and fo=
r this case we are using the first in vgdisplay output.<br>
# Change the variable if you want other VG Name or change head -n 1 to<br>#=
 tail -n 1 if you prefer to use last VG instead of first if you happen to h=
ave<br># more than one VG<br>LVGroupName=3D`vgdisplay | grep &#39;VG Name&#=
39; | awk &#39;{print $3}&#39; | head -n 1`<br>
<br>if [ ! -n &quot;$LVGroupName&quot; ] &amp;&amp; [ ! -d &quot;/dev/${LVG=
roupName}&quot; ] ; then<br>=A0=A0=A0 echo &quot;Unable to detect VG Name!&=
quot;<br>=A0=A0=A0 exit 1<br>fi<br><br># return 1 if is mounted otherwise r=
eturn 0<br>
check_mount() {<br>=A0=A0=A0 local checkdir=3D${1}<br>=A0=A0=A0 if [ -n &qu=
ot;$checkdir&quot; ] ; then<br>=A0=A0=A0 =A0=A0=A0 local check=3D`grep &quo=
t;$checkdir&quot; /proc/mounts`<br>=A0=A0=A0 =A0=A0=A0 if [ -n &quot;$check=
&quot; ] ; then<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 return 1<br>
=A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 fi<br>=A0=A0=A0 return 0<br>}<br><br># =
We will create 5 testcrash LV in $LVGroupName each with 5GB size<br># and f=
ormat it as ext3<br>do_lvm_create_testcrash() {<br>=A0=A0=A0 local lvname=
=3D${1:-testcrash}<br>=A0=A0=A0 local lvsize=3D${2:-5G}<br>
=A0=A0=A0 local count=3D1<br>=A0=A0=A0 local limit=3D5<br>=A0=A0=A0 while [=
 &quot;$count&quot; -le &quot;$limit&quot; ]<br>=A0=A0=A0 do<br>=A0=A0=A0 =
=A0=A0=A0 if [ ! -h &quot;/dev/${LVGroupName}/${lvname}${count}&quot; ] ; t=
hen<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;lvcreate -v -n ${lvname}${c=
ount} -L ${lvsize} ${LVGroupName} ... ... &quot;<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 lvcreate -v -n ${lvname}${count} -L ${lvsize}=
 ${LVGroupName}<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;lvcreate -v -n =
${lvname}${count} -L ${lvsize} ${LVGroupName} completed!&quot;<br>=A0=A0=A0=
 =A0=A0=A0 =A0=A0=A0 if [ -h &quot;/dev/${LVGroupName}/${lvname}${count}&qu=
ot; ] ; then<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;mke2fs -F -j /dev/${LVGr=
oupName}/${lvname}${count} ... ... &quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =
=A0=A0=A0 mke2fs -F -j /dev/${LVGroupName}/${lvname}${count}<br>=A0=A0=A0 =
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;mke2fs -F -j /dev/${LVGroupName}/$=
{lvname}${count} completed!&quot;<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 else<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 echo &quot;/dev/${LVGroupName}/${lvname}${count} not found!&quot;<br>=
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 =A0=
=A0=A0 count=3D`expr $count + 1`<br>=A0=A0=A0 done<br>}<br><br>do_lvm_creat=
e_remove() {<br>
=A0=A0=A0 # number of loops default is 1<br>=A0=A0=A0 local loopcountlimit=
=3D${1:-1}<br>=A0=A0=A0 # snapshot size default is 1G<br>=A0=A0=A0 local sn=
apshotsize=3D${2:-1G}<br>=A0=A0=A0 # implement a sleep between create, moun=
t, umount and remove (default is 0 which is no pause)<br>
=A0=A0=A0 local pauseinterval=3D${3:-0}<br>=A0=A0=A0 # execute commands aft=
er each pause/sleep such as sync or anything that you want to test<br>=A0=
=A0=A0 local commands=3D${4}<br>=A0=A0=A0 # We filter out snapshot and swap=
<br>=A0=A0=A0 local count=3D0<br>=A0=A0=A0 if [ -d &quot;/dev/${LVGroupName=
}&quot; ] ; then<br>
=A0=A0=A0 =A0=A0=A0 while [ &quot;$count&quot; -lt &quot;$loopcountlimit&qu=
ot; ]<br>=A0=A0=A0 =A0=A0=A0 do<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 count=3D`e=
xpr $count + 1`<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;${count} ... ..=
. &quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 for i in `ls /dev/${LVGroupName} =
| grep -Ev &#39;snapshot$&#39; | grep -Ev &#39;swap$&#39;`; do<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 if [ -h &quot;/dev/${LVGroupName}/$=
{i}&quot; ] ; then<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 ech=
o -n &quot;lvcreate -s -v -n ${i}-snapshot -L ${snapshotsize} /dev/${LVGrou=
pName}/${i} ... ... &quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 lvcreate -s -v -n ${i}-snapshot -L ${snapshotsize} /dev/${LVGroupNam=
e}/${i}<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;done.&quot;<br=
>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 sleep ${pauseinterval}<b=
r>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 if [ -n &quot;$commands=
&quot; ] ; then<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 echo -n &quot;${commands} ... ... &quot;<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 $commands<br>=
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;done=
.&quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=
=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 mkdir -p /mnt/testlvm/${i}<br>=
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 if [ -h &quot;/dev/${LVGr=
oupName}/${i}-snapshot&quot; ] ; then<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 check_mount /mn=
t/testlvm/${i}<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 local ismount=3D$?<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0=
 =A0=A0=A0 if [ &quot;$ismount&quot; -eq 0 ] ; then<br>=A0=A0=A0 =A0=A0=A0 =
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo -n &quot;mount /dev/=
${LVGroupName}/${i}-snapshot /mnt/testlvm/${i} ... ... &quot;<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 mount=
 /dev/${LVGroupName}/${i}-snapshot /mnt/testlvm/${i}<br>=A0=A0=A0 =A0=A0=A0=
 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;done.&quot;<b=
r>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 sle=
ep ${pauseinterval}<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =
=A0=A0=A0 =A0=A0=A0 if [ -n &quot;$commands&quot; ] ; then<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 echo -n &quot;${commands} ... ... &quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 $commands<br>=A0=
=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 echo &quot;done.&quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =
=A0=A0=A0 =A0=A0=A0 fi<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 check_mount /mn=
t/testlvm/${i}<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 local ismount2=3D$?<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 =A0=A0=A0 if [ &quot;$ismount2&quot; -eq 1 ] ; then<br>=A0=A0=A0 =A0=A0=
=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo -n &quot;umount =
/mnt/testlvm/${i} ... ... &quot;<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 umoun=
t /mnt/testlvm/${i}<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =
=A0=A0=A0 =A0=A0=A0 echo &quot;done.&quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0=
 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 sleep ${pauseinterval}<br>=A0=A0=
=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 if [ -n &qu=
ot;$commands&quot; ] ; then<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 echo -n &quot;${commands} ... ... &quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 $commands<br>=A0=
=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 echo &quot;done.&quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=
=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =
=A0=A0=A0 =A0=A0=A0 fi<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 =A0=A0=A0=
 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 rm -rf /mnt/testlvm/${i}<br>=A0=A0=A0 =A0=A0=
=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo -n &quot;lvremove -f /dev/${LVGroupN=
ame}/${i}-snapshot ... ... &quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 =A0=A0=A0 lvremove -f /dev/${LVGroupName}/${i}-snapshot<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;done.&quot;<br=
>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 sleep ${pauseinterval}<b=
r>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 if [ -n &quot;$commands=
&quot; ] ; then<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=
=A0 echo -n &quot;${commands} ... ... &quot;<br>
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 $commands<br>=
=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 echo &quot;done=
.&quot;<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=
=A0 =A0=A0=A0 =A0=A0=A0 =A0=A0=A0 fi<br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 done<=
br>=A0=A0=A0 =A0=A0=A0 =A0=A0=A0 rm -fr /mnt/testlvm<br>=A0=A0=A0 =A0=A0=A0=
 done<br>=A0=A0=A0 else<br>=A0=A0=A0 =A0=A0=A0 echo &quot;/dev/${LVGroupNam=
e} directory not found!&quot;<br>
=A0=A0=A0 =A0=A0=A0 exit 1<br>=A0=A0=A0 fi<br>}<br><br>case $1 in<br>=A0=A0=
=A0 setup)=A0=A0=A0 shift<br>=A0=A0=A0 =A0=A0=A0 do_lvm_create_testcrash &q=
uot;$@&quot;<br>=A0=A0=A0 =A0=A0=A0 ;;<br>=A0=A0=A0 loop)=A0=A0=A0 shift<br=
>=A0=A0=A0 =A0=A0=A0 do_lvm_create_remove &quot;$@&quot;<br>=A0=A0=A0 =A0=
=A0=A0 ;;<br>
=A0=A0=A0 *)=A0=A0=A0 cat &lt;&lt;HELP<br>Usage: $0 loop loopcountlimit sna=
pshotsize pauseinterval commands<br>Where:<br>=A0=A0=A0 loopcountlimit is d=
efault to 1<br>=A0=A0=A0 snapshotsize is default to 1G<br>=A0=A0=A0 pausein=
terval is default to 0<br>
=A0=A0=A0 commands is default to none<br><br>Example to run with 100 loops =
without pause/sleep:<br>=A0=A0=A0 $0 loop 100<br><br>Example to run with 10=
0 loops with pause/sleep of 5 seconds:<br>=A0=A0=A0 $0 loop 100 1G 5<br><br=
>Example to run with 100 loops with snapshot size of 2G instead of 1G:<br>
=A0=A0=A0 $0 loop 100 2G<br><br>Example to run with 50 loops, 1G snapshot s=
ize, 5 seconds pause and with sync:<br>command with each pause/sleep<br>=A0=
=A0=A0 $0 loop 50 1G 5 sync<br><br>Example to run your own commands:<br>=A0=
=A0=A0 $0 loop 100 1G 5 &quot;echo hi &amp;&amp; sync&quot;<br>
<br>If this is the first time you are running and do not have any LV in you=
r VG, run:<br>=A0=A0=A0 $0 setup<br>This will create 5 testcrash LV in your=
 VG with 5GB size each (default) and format<br>to ext3.<br><br>HELP<br>=A0=
=A0=A0 =A0=A0=A0 ;;<br>
esac<br><br>----------8&lt;----------8&lt;----------8&lt;----------8&lt;---=
-------8&lt;----------8&lt;----------8&lt;----------8&lt;----------8&lt;---=
------- <br></div></div><br>Thanks.<br><br>Kindest regards,<br>Giam Teck Ch=
oon<br>

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