Re: Lucid Lynx and RT Kernels

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On 06/18/2010 10:08 PM, Robin Gareus wrote:
> On 06/18/2010 04:13 PM, Natanael Olaiz wrote:
>> El 06/16/2010 10:48 AM, Atte André Jensen escribió:
>>> On 2010-06-16 10:45, Atte André Jensen wrote:
>>>
>>>> https://launchpad.net/~abogani/+archive/ppa
>>>
>>> sudo add-apt-repository ppa:abogani/ppa
>>> sudo apt-get update
>>> sudo apt-get install linux-image-2.6.33-1-realtime
>>>
>>
>>
>> ??
>>
>> The latest kernel that I found there is linux-lowlatency_2.6.32.22.35
>> (the used URL is
>> http://ppa.launchpad.net/abogani/ppa/ubuntu/dists/lucid/main/)
> 
> Low-latency is not realtime preemption.

Sorry this was a bit quick and the statement may be misleading:

There's a (old) "low-latency" kernel-patch and also various options to
achieve low-latency with a vanilla kernel.

Those may be good enough for some audio/studio environments, but is not
the same as applying the realtime-preemt patch to the kernel.

The kernel-package-name is made up by your vendor.
It may or may not be a realtime-preemt patched kernel;
`uname -a` will say "PREEMPT" if it is.

> Since the mid 20's the RT-patch is only available for odd minor version
> numbers. eg. 2.6.29, 2.6.31, 2.6.33
> see http://www.kernel.org/pub/linux/kernel/projects/rt/
> 
> Well, maybe someone forward patched or backported rt-stuff onto 2.6.32
> but I would not trust those.. it's way too easy to mess it up.
> 
> ciao,
> robin
> 
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