Subject: Re: System load?
To: None <port-cobalt@netbsd.org>
From: Alex Pelts <alexp@broadcom.com>
List: port-cobalt
Date: 12/11/2006 10:52:46
Sorry. What I meant is that kernel does not work with user land.
Alex Pelts wrote:
> By the way kernel 3-0 branch does not now with user land from this
> restore cd. I had unfortunate luck to find this our on some one else's
> Qube. So if you are going to update kernel for installation from that CD
> do not use 3-0 branch.
>
> Personally I use kernel from 3-0 branch with 3.0 user land and it works
> fine.
>
> Regards,
> Alex
>
>
> Erik Berls wrote:
>> 3.1 is NOT. 3.1 is the 3.0 branch with some additional pullups.
>> 3.99.17 is of about 6 months ago. Thus its closer to the 4 branch.
>>
>> I'm not sure about the cubes, but on the raq's you can execute a BFD
>> line at the prom that may allow you to execute alternate kernels.
>> (It's been a while since I've had to do this.)
>>
>> -=erik.
>>
>>
>>
>>
>> On 12/11/06, *Andy Ruhl* <acruhl@gmail.com <mailto:acruhl@gmail.com>>
>> wrote:
>>
>> On 12/11/06, Glyn Astill <glynastill@yahoo.co.uk
>> <mailto:glynastill@yahoo.co.uk>> wrote:
>> > Sorry to sound basic, if I upgrade the kernel to v4 will that mean
>> > that I'm running version 4 of NetBSD?
>> >
>> > In theory this shouldn't change the way my machine works, it'll
>> just
>> > be running a newer kernel?
>> >
>> > What worries me is if I compile a poo kernel and am unable to get
>> > back into the os to put the old image back.
>> >
>> > What are the Qube specific switches and configurations used to do
>> > this?
>> >
>> > I think I'm going to need some hand hloding through this or I may
>> > cry.
>>
>> Start with this.
>>
>> (Same old "back up your box" disclaimer will apply eventually)
>>
>> Mount your Linux partition and do ls -l in the boot directory on the
>> Linux partition. Here's a quick example:
>>
>> My Qube2 disk (non fixed font garbled, sorry):
>>
>> # disklabel -r wd0
>> # /dev/rwd0d:
>> type: ESDI
>> disk: IC35L060AVER07-0
>> label: fictitious
>> flags:
>> bytes/sector: 512
>> sectors/track: 63
>> tracks/cylinder: 16
>> sectors/cylinder: 1008
>> cylinders: 119150
>> total sectors: 120103200
>> rpm: 3600
>> interleave: 1
>> trackskew: 0
>> cylinderskew: 0
>> headswitch: 0 # microseconds
>> track-to-track seek: 0 # microseconds
>> drivedata: 0
>>
>> 8 partitions:
>> # size offset fstype [fsize bsize cpg/sgs]
>> a: 118993074 1110126 4.2BSD 2048 16384 28608 # (Cyl.
>> 1101*- 119149)
>> b: 1048576 61550 swap # (Cyl.
>> 61*- 1101*)
>> c: 120041650 61550 unused 0 0 # (Cyl.
>> 61*- 119149)
>> d: 120103200 0 unused 0 0 # (Cyl. 0
>> - 119149)
>> e: 61487 63 Linux Ext2 0 0 # (Cyl.
>> 0*- 61*)
>> f: 120041650 61550 unused 0 0 # (Cyl.
>> 61*- 119149)
>>
>> Linux partition is /dev/wd0e, so let's mount it:
>>
>> # mount -t ext2fs /dev/wd0e /mnt
>> # ls -l /mnt/boot
>> total 104
>> -r-xr-xr-x 1 root wheel 22470 Sep 19 2005 boot.gz
>> -r--r--r-- 1 root wheel 27838 Jul 12 2004 boot.old.gz
>> -r-xr-xr-x 1 root wheel 22473 Sep 19 2005 vmlinux.gz
>> -r--r--r-- 1 root wheel 27838 Jul 12 2004 vmlinux.old.gz
>>
>> I'm not remembering at this point if it's vmlinux.gz or boot.gz that
>> is being read by the Cobalt firmware... I believe it's vmlinux.gz.
>> The
>> point is, if it's this small (22k or so), then it's really just the
>> NetBSD bootloader, and this is good news. What it means is, you can
>> just change the NetBSD kernel in / at your own whim to try different
>> kernels.
>>
>> Meaning:
>>
>> 1. compile a new kernel
>> 2. cp /netbsd /netbsd.old
>> 3. cp newkernel /netbsd
>> 4. reboot
>>
>> It's not very likely that you will render the machine unbootable, I
>> haven't had that problem in quite a long time now. The main thing to
>> remember is, you can change the kernels all you want. But once you
>> start upgrading userland utilities to match that kernel, you can't
>> then go backwards back to your old kernel.
>>
>> My best advice is:
>>
>> Find a newer kernel that is newer than your current userland. I'm not
>> sure if 3.1 is, anyone? If so, you can get it here:
>>
>> ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-3.1/cobalt/binary/kernel/netbsd-GENERIC.gz
>>
>>
>> <ftp://ftp.netbsd.org/pub/NetBSD/NetBSD-3.1/cobalt/binary/kernel/netbsd-GENERIC.gz>
>>
>>
>> Then put that one in place and try it. If this one is not newer than
>> your userland, then you'll have to grab either the release-4 or
>> current source and compile a kernel. The NetBSD guide has rather good
>> instructions on doing this. But maybe we can help.
>>
>> Andy
>>
>>
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