Hi Richard,
Kernel recompilation part of the handbook is fairly straightforward
and should walk you through step-by-step without any snags: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-building.html
Just remember to use amd64 instead i386 in the examples @ the link
above. You will need full source tree to play with kernel (sysinstall
to the rescue if you don't).
Disclaimer - the below worked for me multiple times and may or may not
work for you. If you decide to follow the steps outlined below and it
breaks your box, spills your coffee or converts the datacenter into a
recycling center, you are responsible for it and I cannot be held
accountable in any way. In other words - use at your own risk.
The way I do it (6.0-RELEASE) - at this point you must be root:
cd
mkdir kernels
cd /usr/src/sys/amd64/conf
cp GENERIC ~/kernels/GENERIC.ORIG
cp GENERIC NEWKERNEL
vim NEWKERNEL, search for
ident GENERIC
and change to NEWKERNEL
then, add the following line below all other 'options' lines:
options PAE # large memory (>4G) support
then, find and comment out these two lines to avoid a conflict with PAE:
device adv # Advansys SCSI adapters
device adw # Advansys wide SCSI adapters
I am not sure about the Advansys conflict in versions newer than 6.0.
A total of 4 lines to edit on of my stock 6.0-RELEASE GENERIC kernel.
Then:
cd /usr/src
make buildkernel KERNCONF=NEWKERNEL
if compiles, install:
make installkernel KERNCONF=NEWKERNEL
once that's done, reboot and you should see your new kernel
Here's a diff from my 6.0:
[r...@banksy /usr/src/sys/i386/conf]# diff BANKSYPAE GENERIC
25c25
< ident BANKSYPAE
---
> ident GENERIC
65c65
< options PAE # 2006-12-12 Large memory support
ma...@bmihosting.com
---
>
96,97c96,97
< # conflicts with PAE device adv # Advansys SCSI
adapters
< # conflicts with PAE device adw # Advansys wide
SCSI adapters
---
> device adv # Advansys SCSI adapters
> device adw # Advansys wide SCSI adapters
Good luck.
Cheers,
Matthew Szubrycht
On Oct 29, 2009, at 8:52 PM, Richard Gehlbach wrote:
I am installing FreeBSD 7.2 / amd64 on a new server (HP DL370 G6)
with 2 quad Xeon processors and 16GB memory. I have worked with the
i386 versions since version 3.x, but this is the first server large
enough to need amd64.
I have been trying to determine the correct procedures for
rebuilding the world and kernel. I have not been able to find a
location that had step by step instructions, similar to the
handbook, for properly working with the amd64 version. Searches
have turned up so many fragments of what needs to be done, that I
cannot feel confident trying to put the pieces together.
I need instructions for the command line compile options, conf file
additions, and any special instructions.
If anyone can point me to some applicable links or some specific
instructions, it would be appreciated.
TIA
Richard
--
Richard D. Gehlbach Gehlbach Consulting Services
rdgeh...@gehlbach.com 3321 Pepperhill Ct.
859.269.6658 Fax 859.266.7446 Lexington, KY 40502
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