[CentOS] Going back to old kernels?

Wed Dec 12 23:42:27 UTC 2007
Christopher Chan <christopher at ias.com.hk>

Kai Schaetzl wrote:
> Christopher Chan wrote on Wed, 12 Dec 2007 22:28:24 +0800:
> 
> Hi Christopher, thanks for your reply!
> 
>> May I ask whether the nature of your crashes involve network code?
> 
> No, it's likely more a filesystem issue. I posted earlier on the tenth in
> the message "unstable kernel after update to CentOS 4.5" about it.
>>From 6 kernel dumps 5 were with process dovecot-auth, one with "mv". As 
> dovecot-auth accesses user's home directories I assume it could be related 
> to the corruption problem (which seems to be fixed, though, after I did a 
> repair of that partition, it seems the earlier boots reflagged the 
> filesystem as clean, but didn't repair it) I describe in that message.
> 
> If I go back to the old kernel and the problem persists it's not related to 
> the new kernel but probably indeed a hardware problem.

That would be it won't it?

> 
>> The only packages that may possibly not work with older kernels are 
>> packages related to the kernel like iptables or kernel modules. You 
>> should not have to worry about iptables as it has not been updated since 
>> release. I cannot say much else than that since I do not know what is on 
>> your box.
> 
> Hm, kernel modules are coming with the kernel package as well, arent't 
> they? And they are still around (in /lib/modules) unless I uninstall them, 
> right? I didn't install or compile any extra modules. Are there other 
> packages beyond iptables that hold modules? This is a non-X webserver-type 
> machine, not clustered, simple IDE. So, should likely be fine to revert?
> 

I take it then that you do not have any third party modules then. In 
which case, it will be just fine to reboot with an older kernel. Just 
change the default entry set in grub.conf.