On Feb 23, 2009, at 1:32 PM, Dan Nelson wrote:
In the last episode (Feb 23), Andrew Moran said:
I have 8 gigs of memory in this system, and I decided go to the ZFS
route,
and am now getting kernel panics about kmem exhaustion. I know
there are
some tweaks I can do to help alleviate these, but I want to address
all my
memory before I increase the kernel memory.
I don't need the ports to be 64-bit, but they SHOULD run just fine
without recompiling, yes?
As long as you never recompile anything again, yes :) But as soon
as you
upgrade (say) libX11 to 64-bit, all dependant libraries and program
will
need to be brought up to 64-bit as well. You might as well do them
all.
I just did this 32->64 upgrade a few weeks ago, and since I had a
ZFS root,
I was able to do this:
Snapshot+clone a new copy of my root filesystem (called root.amd64)
Do a cross-build+installworld into that partition
Install a 64-bit kernel into my /boot partition (installed as
/boot/kernel.amd64 temporarily)
Edit /boot/loader.conf and add
vfs.root.mountfrom="zfs:local_pool/root.amd64"
kernel="kernel.amd64"
Edit /etc/fstab on root.amd64 to mount / from local_pool/root.amd64
Cross fingers, and reboot into amd64-land
Portupgrade -fa (this step wan't flawless since I was also upgrading
through the perl58 and gnome-2.24 updates, but still took less
than 24
hours)
All the while having my i386 kernel and root available to reboot
back into
if I screwed something up horribly :)
If you use any programs that keep machine-dependant file formats
(rrdtool
data files, for example), export them to a portable format before the
switch, and reimport them afterwards.
When I was satisfied I had a stable system, I moved my 64-bit kernel
into
/boot/kernel, removed the kernel= line from boot.conf, promoted the
cloned
root.amd64 filesystem and destroyed the i386 root and the snapshot.
--
Dan Nelson
dnel...@allantgroup.com
Thank you for this posting. This is exactly what I wanted to do.
However, booting into the new kernel didn't work for some reason, so I
wound up burning an AMD64 boot-only CD and reinstalling the minimal
64bit version to the boot partition. I was able to read all my ZFS
filesystems, so no real loss of data.
I'm now going through the portupgrade -fa to upgrade all my ports.
--Andy
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