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> Preparation for XFS Installation </TITLE
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><A
NAME="AEN51">2. Preparation for XFS Installation</H1
><DIV
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><H2
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><A
NAME="AEN53">2.1. Downloading the Linux 2.4.x-XFS Kernel Source</H2
><P
>Currently the only place to get the source code for the XFS enabled
Linux kernel is straight from SGI's Open Source Development site
via CVS.
</P
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>Note</B
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><P
>two distinct trees are available:
<P
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><P
>linux-2.5-xfs: development tree</P
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>linux-2.4-xfs: stable bug fix only tree</P
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>
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><P
> My experience has been with the 2.4 tree, but I imagine everything
will work the same with the development tree. Both trees are kept
in sync with their respective mainline kernel tree at least to the
point of major release numbers.
</P
><P
>Here are the steps to download the kernel source tree:
</P
><P
>A. Normally the linux kernel source is installed in the /usr/src
directory, so you should start off by switching to that directory.
</P
><P
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>$ cd /usr/src
</PRE
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</P
><P
>B. Next, you should set the CVSROOT environment variable so that
it points to the proper cvs server.
</P
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><P
>If you are running sh, bash, ksh, etc...:
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>$ export CVSROOT=':pserver:cvs@oss.sgi.com:/cvs'
</PRE
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</P
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>If you are running csh or tcsh:
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>$ setenv CVSROOT :pserver:cvs@oss.sgi.com:/cvs
</PRE
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</P
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><P
>If you plan on updating your kernel often (to keep up with the
latest changes) you might want to put this in your login script.
</P
><P
>C. Then log in to the cvs server.
</P
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>$ cvs login (the password is "cvs")
</PRE
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>This needs to be done only ONCE, not everytime you access CVS.
</P
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>D. Now grab linux-2.4-xfs. The first time you will want to do
something like:
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>$ cvs -z3 co linux-2.4-xfs
</PRE
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</P
><P
>After you have checked the code out, you can use:
</P
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>$ cvs -z3 update linux-2.4-xfs
</PRE
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>
</P
><P
>to update your copy to the latest version from the CVS server.
</P
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><A
NAME="AEN89">2.2. XFS Support as Modules or Compiled Into the Kernel?</H2
><P
>The option to build XFS support for the Linux kernel as modules
is available and will work (or so I am told) with the help of an
initial RAM disk and a couple of additions to the lilo configuration.
I have not tried this (yet), so I will not include documentation
on how this is done other than just to qoute from a message to the
development mailing list from Russell Cattelan:
</P
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>Actually running xfs as a module isn't very hard. in the
directory cmd/xfs/misc there is a modified mkinitrd the will always
generate a ram disk with pagebuf xfs_support and xfs.
</P
><P
>Once that is done just add the initrd line in lilo.conf AND
</P
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>append = "ramdisk_size=25000"
</PRE
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</P
><P
>The default size is 4096 which isn't nearly large enough to hold
xfs.
</P
><P
>This is from my laptop.
</P
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>punch[12:57am]-=&#62;mount
/dev/ide/host0/bus0/target0/lun0/part8 on / type xfs (rw,noatime)
none on /proc type proc (rw)
/dev/ide/host0/bus0/target0/lun0/part6 on /boot type ext2 (rw,noatime)
none on /dev/pts type devpts (rw,mode=0620)
/dev/ide/host0/bus0/target0/lun0/part1 on /mnt/windows type vfat (rw,nosuid,nodev,umask=0)
/dev/ide/host0/bus0/target0/lun0/part9 on /blam type xfs (rw)
punch[12:57am]-=&#62;lsmod
Module Size Used by
autofs 13180 1 (autoclean)
usb-uhci 24918 0 (unused)
usbcore 35339 0 [usb-uhci]
3c59x 25149 1 (autoclean)
maestro 29757 0 (unused)
soundcore 6085 2 [maestro]
vfat 13075 1 (autoclean)
fat 37733 0 (autoclean) [vfat]
xfs 447888 2
xfs_support 13954 0 [xfs]
pagebuf 39935 2 [xfs]
image=/boot/vmlinuz-2.4.0-XFS-test13-pre4
label=t13p4
root=/dev/hda8
initrd=/boot/initrd-2.4.0-XFS-test13p4.img
append="ramdisk_size=25000"
read-only
</PRE
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>--<SPAN
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> Russell Cattelan
</SPAN
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><P
>It seems to me that compiling the support into the kernel would
be much simpler, so that is how I am doing it at this point. I will
try it as a module at a later time and add more detailed instructions
then. If anyone has time to document this method before I get around
to it please email it to me and I will include it with credit given
where credit is due. :-)
</P
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