Migrating 5.2 from Pentium 4 to Athlon MP

[Kent Stewart]

On Tuesday 27 January 2004 09:10 am, Ihsan Junaidi wrote:
> Hello all,
>
> I have a server currently running on a Pentium 4 box. Yesterday I
> bought an AMD 762 MPX chipset to go with two Athlon MP 2000+. The
> production server is running FreeBSD 5.2, a GENERIC with additional
> SCSI/RAID controllers trimmed off.
>
> The kernel and all of the userland + ports were built with -march=p4
> flags and I am wondering if there's any way I can just plug the disk
> into the Athlon box without rebuilding everything with the exception
> of the world+kernel. FYI, the kernel is SMP-aware.
>
> How does the -march flag effect the userland programs? I am aware
> that only OpenSSL is capable of taking advantage of specific CPU
> instructions but other than that?
>

Rebuild your system with out the cpu flags in make.conf. It is too 
likely that there is cpu specific stuff in userland libraries that were 
linked to your builds. I have moved from P-IIIs to AMDs without 
problems. I also don't use the cpu flag on systems that I may NFS mount 
to rebuild one of the other systems with. I have recovered systems by 
doing a NFS mount and and installkernel and installworld. I wouldn't 
have even tried if they had been built with a cpu option.

Kent

-- 
Kent Stewart
Richland, WA

http://users.owt.com/kstewart/index.html