[asterisk-users] Recompiling dahdi-linux after kernel update - To minimize downtime

[Tzafrir Cohen]

On Thu, Jun 18, 2009 at 11:24:40PM -0500, Karl Fife wrote:
> After a kernel update (but before rebooting) Is there a way to recompile Zap/Dahdi against the new kernel?
> 
> My objective is to eliminate the additional downtime that occurs while recompiling/installing zap/dahdi after booting into the new kernel.
> 
> Please correct me if I'm wrong:  
> My understanding is that until you reboot (after a kernel update), recompiling zap/dahdi still compiles against the OLD kernel, and that's why zap/dahdi doesn't start after rebooting into the new kernel (even if you recompiled it just before rebooting).  
> 
> So my question is: 
> Is there a method to recompile dahdi/zap against the new kernel such that the only downtime is the actual server bounce itself?  OR is the current best practice just to simply to reboot, recompile, restart?  
> 
> Thanks in advance.

1. install new kernel (but don't reboot yet)
2. in the dahdi-linux source directory:

  make KVERS=<new version>
  make KVERS=<new version> install

  or:

  make KSRC=/path/to/kernel/source/tree
  make KSRC=/path/to/kernel/source/tree install

3. reboot

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               Tzafrir Cohen
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