Date: Thu, 26 Feb 2009 15:30:48 -0800 From: Andrew Moran <amoran@forsythia.net> To: freebsd-questions@freebsd.org Subject: Re: Upgrade from FreeBSD 7.1/i386 to FreeBSD 7.1/AMD64? Message-ID: <4C74AB92-D535-42AB-A326-351ADB5BF667@forsythia.net> In-Reply-To: <20090223213225.GC45976@dan.emsphone.com> References: <A8482213-D958-4084-8214-AFC201471991@forsythia.net> <20090223200512.GA47390@slackbox.xs4all.nl> <54B6CFF8-1C2C-40C6-AB90-AABA3ADFA0E7@forsythia.net> <20090223213225.GC45976@dan.emsphone.com>
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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 > dnelson@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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