Jonas Genannt - kernel

git - revision control systen

nospam@example.com (Jonas Genannt) — Fri, 11 Aug 2006 19:05:36 +0200

Git the (new) revision control systen used by the Linux kernel is very nice, if you know how to use it.

Here are some hints for you/me:

Downloads the git archive to your local directory linux-2.6.16.x:
git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6.16.y.git linux-2.6.16.x

Updates your git archive with the servers archive:
git pull git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6.16.y.git

Lists the available Tags in the Branch:
ls -la .git/refs/tags/

Creates an diff between to Tags:
git diff v2.6.16.24..v2.6.16.25

Devolo dLAN linux driver

nospam@example.com (Jonas Genannt) — Wed, 02 Aug 2006 23:13:52 +0200

Devolo dLAN USB drivers for the devolo network over power module.

If you try to compile the version 2.0 on an higher kernel than 2.6.13 you get the following error:

make[2]: Entering directory `/usr/src/linux-2.6.16.18'
CC [M] /home/jonas/dLAN-linux-package-2.0/driver/devolo_usb.o
/home/jonas/dLAN-linux-package-2.0/driver/devolo_usb.c: In function `devolo_tx_timeout':
/home/jonas/dLAN-linux-package-2.0/driver/devolo_usb.c:205: error: `URB_ASYNC_UNLINK' undeclared (first use in this function)
/home/jonas/dLAN-linux-package-2.0/driver/devolo_usb.c:205: error: (Each undeclared identifier is reported only once
/home/jonas/dLAN-linux-package-2.0/driver/devolo_usb.c:205: error: for each function it appears in.)
make[3]: [/home/jonas/dLAN-linux-package-2.0/driver/devolo_usb.o] Error 1
make[2]: [module /home/jonas/dLAN-linux-package-2.0/driver] Error 2

The URB_ASYNC_UNLINK symbol is removed from the kernel.

This afternoon Alan Stern submitted a patch to remove the URB_ASYNC_UNLINK
flag from the Linux kernel. Mr. Stern explained, "This flag is a relic
from an earlier, less-well-designed system. For over a year it hasn't
been used for anything other than printing warning messages."

For the complete text klick here!

So remove the lines 204 till 208 in the file driver/devolo_usb.c.

Restart the make, and the driver will now compile fine and work.

Why you should read the kernel changelog

nospam@example.com (Jonas Genannt) — Fri, 19 May 2006 02:01:42 +0200

Why you should read the kernel changelog? - You have to read it, when you use an 2.6.16 vanilla kernel on a native sarge.

When you don't have any problems with LVM (lvm2) and the kernel.

In the Kernel ChangeLog there are nice informations like this:

If you're using lvm2, for this patch to work correctly you should update to lvm2 version 2.02.01 or later and device-mapper version 1.02.02 or later.

If I had read this, I would have had no problems with LVM and kernel 2.6.16!

Note for me: Fly over kernel changelog for every new kernel!

mii-tool and 1Gbit/s links

nospam@example.com (Jonas Genannt) — Thu, 20 Apr 2006 02:34:43 +0200

Note to myself: mii-tool can't operate with 1Gbit/s and more.

Use ethtool, provides more informtion and has no 100Mbit/s limit.

It's in Debian, so apt-get install ethtool

Xen included to the kernel soon?

nospam@example.com (Jonas Genannt) — Fri, 14 Apr 2006 19:32:21 +0200

Today I have read on Heise.de that Xen is one step closer to go into the linux kernel.

I hope this would be soon, because I am a big fan of Xen.

Atheros WLan Device

nospam@example.com (Jonas Genannt) — Mon, 13 Mar 2006 22:10:08 +0100

Atheros W-Lan Chipsets are really cool. Easy installation...

I have bought an Dlink DWL-G520 (WITHOUT the PLUS (+)), get the source from the subversion and compiled it on my sarge system.

After an

modprobe wlan_scan_sta

and

modprobe ath_pci

the Atheros card should be ready.

An

ifconfig ath0 up

and

iwlist ath0 scanning

I found my WLan.

So nice work from the Atheros developers.

BTW: The Card have a good sending and receiveing rate!

boot kernel over network with initrd ramdisk

nospam@example.com (Jonas Genannt) — Tue, 14 Feb 2006 20:54:12 +0100

if you want to boot kernel and initrd over the network, please recompile the kernel and change the

CONFIG_BLK_DEV_RAM_SIZE=

to your new size of the initrd.

Per default it is 4MB that is not very much, if you use initrd for /