Date: Wed, 7 Feb 2001 20:13:04 -0000 From: "G D McKee" <freebsd@gdmckee.com> To: "Matthew Koivisto" <mkoivist@nortelnetworks.com> Cc: "freebsd-questions" <freebsd-questions@FreeBSD.ORG> Subject: Re: Multiple kernels Message-ID: <000b01c09142$60faeba0$0500a8c0@gdmckee.local> References: <E1A4B2CC91EBD1118A510000F80836F803ECAB0D@zwdld002.ca.nortel.com>
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[-- Attachment #1 --]
RE: Multiple kernelsHi
It is all in the FreeBSD handbook.
You need to cvsup your source, and do a make world. Then compile a new 4.2 kernel.
Gordon.
----- Original Message -----
From: Matthew Koivisto
To: 'freebsd-questions@freebsd.org'
Sent: Wednesday, February 07, 2001 7:35 PM
Subject: RE: Multiple kernels
Thnxs a lot,
Now I have another question :)
There's not really a clear how-to out there on upgrading a freeBSD system (I didn't install 4.1, someone else did) I've seen warning about not buliding a new (ie 4.2) kernel from a system running 4.1. I don't really understand, how else are you supposed to build a 4.2 kernel? Or am I just dumb and not understanding this warning?
Thnx,
Matt Koivisto
-----Original Message-----
From: Tim McMillen [mailto:timcm@umich.edu]
Sent: Wednesday, February 07, 2001 1:57 PM
To: Koivisto, Matthew [WDLN2:AN33:EXCH]; 'freebsd-questions@freebsd.org'
Subject: Re: Multiple kernels
On Wednesday February 07, 2001 13:32, Matthew Koivisto wrote:
> > Hi, I'm fairly new to freeBSD and I'm currently running a system
with
> freeBSD 4.1 - RELEASE. I would like to upgrade to freeBSD 4.2 -
> RELEASE but I would also like to keep my old 4.1 kernel around. Is it
> possible to use the kernel boot loader to run different kernel
> versions like this? Or is the kernel boot loader just for loading
> kernels built with different options and not versions?
You can load that kernel, but it will not work. Basically you can't do
that. In FreeBSD, the kernel is tightly integrated with the rest, and
must have the same version. This is generally helpful and provides
much of FreeBSD's stability.
If you have compiled something into your 4.1 kernel that you want,
then you'll have to put that into a new kernel config file for 4.2 and
recompile your kernel, if you want to use 4.2
Tim
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<HTML><HEAD><TITLE>RE: Multiple kernels</TITLE>
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<DIV><FONT face=Arial size=2>Hi</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>It is all in the FreeBSD handbook.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>You need to cvsup your source, and do a make
world. Then compile a new 4.2 kernel.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Gordon.</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mkoivist@nortelnetworks.com
href="mailto:mkoivist@nortelnetworks.com">Matthew Koivisto</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=freebsd-questions@FreeBSD.ORG
href="mailto:'freebsd-questions@freebsd.org'">'freebsd-questions@freebsd.org'</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 07, 2001 7:35
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Multiple kernels</DIV>
<DIV><BR></DIV>
<P><FONT size=2>Thnxs a lot, </FONT><BR><FONT size=2>Now I have another
question :)</FONT> <BR><FONT size=2>There's not really a clear how-to out
there on upgrading a freeBSD system (I didn't install 4.1, someone else did)
I've seen warning about not buliding a new (ie 4.2) kernel from a system
running 4.1. I don't really understand, how else are you supposed to build a
4.2 kernel? Or am I just dumb and not understanding this warning?</FONT></P>
<P><FONT size=2>Thnx,</FONT> <BR><FONT size=2>Matt Koivisto</FONT> </P>
<P><FONT size=2> -----Original Message-----</FONT> <BR><FONT size=2>From:
Tim McMillen [<A
href="mailto:timcm@umich.edu">mailto:timcm@umich.edu</A>] </FONT><BR><FONT
size=2>Sent: Wednesday, February 07, 2001 1:57 PM</FONT> <BR><FONT
size=2>To: Koivisto, Matthew [WDLN2:AN33:EXCH];
'freebsd-questions@freebsd.org'</FONT> <BR><FONT
size=2>Subject: Re: Multiple
kernels</FONT> </P>
<P><FONT size=2>On Wednesday February 07, 2001 13:32, Matthew Koivisto
wrote:</FONT> </P>
<P><FONT size=2>> > Hi, I'm fairly new to freeBSD and I'm currently
running a system </FONT><BR><FONT size=2>with</FONT> <BR><FONT size=2>>
freeBSD 4.1 - RELEASE. I would like to upgrade to freeBSD 4.2 -</FONT>
<BR><FONT size=2>> RELEASE but I would also like to keep my old 4.1 kernel
around. Is it</FONT> <BR><FONT size=2>> possible to use the kernel boot
loader to run different kernel</FONT> <BR><FONT size=2>> versions like
this? Or is the kernel boot loader just for loading</FONT> <BR><FONT
size=2>> kernels built with different options and not versions?</FONT> </P>
<P><FONT size=2>You can load that kernel, but it will not work.
Basically you can't do </FONT><BR><FONT size=2>that. In FreeBSD, the
kernel is tightly integrated with the rest, and </FONT><BR><FONT size=2>must
have the same version. This is generally helpful and provides
</FONT><BR><FONT size=2>much of FreeBSD's stability.</FONT>
<BR> <FONT size=2>If you have
compiled something into your 4.1 kernel that you want, </FONT><BR><FONT
size=2>then you'll have to put that into a new kernel config file for 4.2 and
</FONT><BR><FONT size=2>recompile your kernel, if you want to use 4.2</FONT>
</P>
<P>
<FONT size=2>Tim</FONT> <BR><FONT
size=2>-- </FONT></P>
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