FWIW, if you use an init scrit rather than SWAPGEN to handle swap creation
on VDisk, this also frees you from having to IPL CMS prior to booting Linux
- shaving a little time off of the boot process.
It also allows you to easily use one script for all your systems while
defining different VDisk/TDisk configurations in your user directory to meet
different swapping requirements.
Here's an example that will bring online, prepare as swap volumes, and
swapon any VDisk and TDisk volumes defined for the user ID within which
Linux is running:
#!/bin/bash
# /etc/init.d/boot.makeswap
# chkconfig: 3 07 92
# Description: Creates swap on V-Disk.
#
### BEGIN INIT INFO
# Provides: boot.makeswap
# Required-Start: boot.localfs boot.device-mapper
# Should-Start:
# Required-Stop: boot.localfs boot.device-mapper
# Should-Stop:
# Default-Start: B
# Default-Stop:
# Description: Enable swap on vdisk/tdisk
# Short-Description: Enable swap on vdisk/tdisk
### END INIT INFO
if [[ $1 = 'start' ]]; then
# Create swap on VDISKs:
for vdev in $(vmcp q v dasd | awk '/(VDSK)/{print $2}'); do
chccwdev -e ${vdev} &>/dev/null
sleep 1
udevadm settle &>/dev/null || udevsettle &>/dev/null
sleep 1
if [[ -b /dev/disk/by-path/ccw-0.0.${vdev} ]]; then
mkswap -f /dev/disk/by-path/ccw-0.0.${vdev}
# The -p option here sets a priority to force the use of this vdisk
# swap before any real-disk swap partitions or swap files.
swapon -p 1023 /dev/disk/by-path/ccw-0.0.${vdev}
fi
done
# Create swap on TDISKS:
for vdev in $(vmcp q v dasd | awk '/(TEMP)/{print $2}'); do
chccwdev -e ${vdev} &>/dev/null
sleep 1
udevadm settle &>/dev/null || udevsettle &>/dev/null
sleep 1
if [[ -b /dev/disk/by-path/ccw-0.0.${vdev} ]]; then
if [[ $(grep "^0.0.${vdev}" /proc/dasd/devices | grep '(ECKD)') ]];
then
dasdfmt -y -b 4096 /dev/disk/by-path/ccw-0.0.${vdev}
sync
sleep 1
fdasd -a /dev/disk/by-path/ccw-0.0.${vdev}
udevadm settle &>/dev/null || udevsettle &>/dev/null
sleep 1
mkswap -f /dev/disk/by-path/ccw-0.0.${vdev}-part1
swapon -p 255 /dev/disk/by-path/ccw-0.0.${vdev}-part1
elif [[ $(grep "^0.0.${vdev}" /proc/dasd/devices | grep '(FBA )') ]];
then
mkswap -f /dev/disk/by-path/ccw-0.0.${vdev}
swapon -p 255 /dev/disk/by-path/ccw-0.0.${vdev}
fi
fi
done
fi
...also setting swap priorities such that your (fast) VDisk swap space will
be used before any TDisk swap space is used, and your TDisk swap space will
be used before any static swap files or partitions (assuming those are
brought up with without specifying a priority level, or with a priority
level of < 255 specified).
This behavior can, of course, be modified to suit your needs by modifying
the script.
On Fri, Aug 5, 2011 at 12:35 PM, Mark Post <[email protected]> wrote:
> >>> On 8/5/2011 at 12:11 PM, <[email protected]> wrote:
> > OK found my problem. When I uploaded initrd.img, I didn't realize I
> had
> > a disk full error. My bad.
> >
> > Fixed that and everything comes up. I have Fedora 15 installed.
> >
> > Does SWAPGEN work with this? What do you do regarding your swap
> > partitions?
> >
> > I used vdisk for my swap disks and when I did a swapon, linux complained.
>
> SWAPGEN is not distribution specific. If you don't want to modify your
> Linux startup scripts to do a "mkswap" on your VDISKS, then SWAPGEN is the
> only way to go.
>
>
> Mark Post
>
> ----------------------------------------------------------------------
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> ----------------------------------------------------------------------
> For more information on Linux on System z, visit
> http://wiki.linuxvm.org/
>
----------------------------------------------------------------------
For LINUX-390 subscribe / signoff / archive access instructions,
send email to [email protected] with the message: INFO LINUX-390 or visit
http://www.marist.edu/htbin/wlvindex?LINUX-390
----------------------------------------------------------------------
For more information on Linux on System z, visit
http://wiki.linuxvm.org/
