[CentOS] trying to recompile

[Andrew Zahn]

Jim Perrin wrote:

>>warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID 443e1821
>>public key not available for qt-devel-3.3.3-9.3.i386.rpm
>>    
>>
>
>Matt had the answer for this error.
>
>  
>
>>does anyone know what to do at this point?
>>    
>>
>
> Once you've done what he suggested, You should install the kernel
>from centosplus as it has XFS support built in. No need for you to
>build anything. You can do this with "yum --enablerepo centosplus
>install kernel"
>  
>
Okay I got to this point above, and it worked great! I was able to mount 
and use an xfs partition. I edited grub.conf to use the kernel entry below:

title CentOS (2.6.9-11.106.unsupported)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-11.106.unsupported ro root=/dev/hda2 rhgb 
quiet
        initrd /initrd-2.6.9-11.106.unsupported.img

I am assuming this was the one that was installed via "yum --enablerepo 
centosplus install kernel". However now I have lost my smp support :(. 
On this system I have two processors and I run them hyperthreaded. How 
can I enable smp support in this kernel?

>Also, getting the kernel-source package provides you with the kernel
>source in /usr/src/linux-VERSION like you'd expect, but doesn't really
>give you the proper way to rebuild a kernel for an rpm based
>distribution. If you build/install your own custom kernel outside the
>package manager you can cause problems with updates down the road for
>things that depend on the kernel. RPM is not aware of things you don't
>tell it about. To properly rebuild a kernel for an rpm based system, a
>decent how-to is available at
>http://crab-lab.zool.ohiou.edu/kevin/kernel-compilation-tutorial-en/
>
>
>Last thing. Since it seems you haven't installed the gpg key at this
>point, make sure you do a "yum update" after you import the GPG key.
>This will bring your system up to date with the latest packages to
>help avoid any potential security risks etc.
>
>
>--
>Jim Perrin
>System Administrator - UIT
>Ft. Gordon & US Army Signal Center
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>CentOS at centos.org
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>  
>