Applying kernel patches

[Steve Blackwell]

On 06/09/04 20:03:34, Alexander Dalloz wrote:
> Am Di, den 07.09.2004 schrieb Steve Blackwell um 1:17:
> 
> > I downloaded the kernel-sourcecode-2.6.8-1.521 rpm and then the
> > voluntary preemption patch voluntary-preempt-2.6.8.1-P9 from
> > http://people.redhat.com/mingo/voluntary-preempt/older and placed
> this
> > in the kernel source directory. Then using the instructions from  
> the
> 
> > low latency wiki, http://wiki.philkern.de/5.html, I ran this
> command:
> >
> > patch -p1 --dry-run < ./voluntary-preempt-2.6.8.1-P9
> >
> > I get a bunch of errors. Here is the beginning of the output:
>
...
> 3 failed hunks - that is ok and should be quickly fixable
> 
> > Reversed (or previously applied) patch detected!  Assume -R? [n]
> 
> That is not good. You will need to compare the patch code and the
> existing kernel code. Maybe parts of your preempt patch code is
> already
> in the Fedora kernel source.

Hmmm. I found this link:

http://rpmfind.rediris.es/rpm2html/fc2-i386-updates/kernel-doc-2.6.8-1.521.noarch.html

that says that the voluntary preemption patch has already been added  
but the instructions to enable voluntary preemption from  
http://wiki.philkern.de/5.html

echo 3 > /proc/sys/kernel/voluntary-preemption

fail because the file doesn't exist. So I'm not sure whether it has or  
hasn't or perhaps there a step missing.

Steve.