Bug#499833: chccwdev cannot set device offline in Lenny

[z***@wowway.com]

Package: s390-tools
Version: 1.6.2-1

This works just fine in Etch, but fails in Lenny. A device cannot be taken
offline dynamically. In my case, I have a separate dasd device for use as
a boot partition. The device number is 0201, which Linux references as
0.0.0201. The device node name for this device is /dev/dasdb. The
device has a single partition, /dev/dasdb1, is formatted using the ext3
file system, and is mounted as /boot in /etc/fstab. The device normally
uses the dasd_diag_mod driver, but in order to get zipl to work, I have
to switch to the dasd_eckd_mod driver. The following sequence of commands
(logged in as root) is what I normally use in Etch with my custom kernel:

umount /boot
echo 0 >/sys/bus/ccw/devices/0.0.0201/online
echo 0 >/sys/bus/ccw/devices/0.0.0201/use_diag
echo 1 >/sys/bus/ccw/devices/0.0.0201/online
mount -t ext3 /dev/dasdb1 /boot
.
. invoke zipl (or update-initramfs, or aptitude dist-upgrade, or whatever)
.
umount /boot
echo 0 >/sys/bus/ccw/devices/0.0.0201/online
echo 1 >/sys/bus/ccw/devices/0.0.0201/use_diag
echo 1 >/sys/bus/ccw/devices/0.0.0201/online
mount -t ext3 /dev/dasdb1 /boot

When I do this under recent versions of Lenny, though, the device never goes
offline, as verified by

cat /sys/bus/ccw/devices/0.0.0201/online

which still shows 1 after supposedly setting the device offline. Another
way of telling is to issue

cat /proc/dasd/devices

which still shows the device online using the original DIAG driver.

I tried using

chccwdev -d 0.0.0201

also, and it says that it did it, but in reality nothing has changed.
The device is still online. Just for grins, I tried setting a device
offline dynamically which was using the ECKD driver, but that
doesn't work either.

Kernel is stock Lenny kernel linux-image-2.6.24-1-s390, Version 2.6.24-7.

--

[Bastian Blank]

Post by z***@wowway.com
This works just fine in Etch, but fails in Lenny. A device cannot be taken
offline dynamically.

I fail to see what s390-tools or the chccwdev tools have to do with this
problem.

Post by z***@wowway.com
The device normally
uses the dasd_diag_mod driver, but in order to get zipl to work, I have
to switch to the dasd_eckd_mod driver.

Just to be curious, why do operate it in diag mode then? /boot is not
used in normal operation.

Post by z***@wowway.com
Kernel is stock Lenny kernel linux-image-2.6.24-1-s390, Version 2.6.24-7.

Lenny have 2.6.26-5.

Bastian

[Debian Bug Tracking System]

Your message dated Mon, 25 Jan 2010 05:58:04 +0100
with message-id <***@planet.nl>
and subject line Bug#499833: chccwdev cannot set device offline in Lenny
has caused the Debian Bug report #499833,
regarding chccwdev cannot set device offline in Lenny
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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