How to get a RT patch for a recent stable kernel ?

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eLRIC
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I'm not really familiar with the delivery process of RT patches for kernel (as found on Ingo site - http://people.redhat.com/mingo/realtime-preempt/). It seems that there is always an available patch for the latest kernel (i.e. 2.6.21-rc5), but not for the latest stable kernel (i.e. 2.6.20.4) ...

Is there a place where one can get the patch for recent stable kernel versions ? (2.6.21-rcX is still unstable on my computer ... and I like Linux stability :) )

nowhiskey
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Joined: 2006-09-30
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hi,
you can try if the patch-2.6.20-rt8 applies on 2.6.20.4 kernel, i did not tried yet.
the 2.6.20-rt8 patch applies at least on 2.6.20 kernel, but on 2.6.20.1 too.
i am using in the moment 2.6.20.1-rt8(which is from 2.6.20 actually).

cheers,
doc

SK
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The patches there apply to the 2.6.X.0-kernel (not .1). They include the patches to update for 2.6.X.1 or 2.6.X.2. But they often they don't include the latest version of that stable kernel because the developers move on to the most actual version. Just compare the release dates to see in which version the break is.

As to stability:
Don't expect that one RT version works better than the other. RT is highly experimental for all kernel versions. There are always different things broken. You have to try which version works best for you.

If you happen to use ubuntu, the vanilla kernels are bad for you because they don't include the special ubuntu patches. Check the page at https://wiki.ubuntu.com/RealTime then, which is a kernel based on 2.6.20-rt8.

eLRIC
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Thanks for the info. I understand with your explanations why RT kernels will still be experimental ...

I'll try to build a new RT kernel based on 2.6.20.1 and see if it is stable enough

Janet Kellman
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Joined: 2007-07-11
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eLRIC, how stable new RT kernel based on 2.6.20.1 ?
I have some questions, if you have some free time, i will email you...
thanks in adv...

Janet Kellman, software reviews

nowhiskey
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i think that there some things got changed, so it might be good to use 2.6.21.5 with the 2.6.21.5-rt20 patch.

it runs here pretty good!

cheers,
doc

eskild
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I've run 2.6.21.5 + 2.6.21.5-rt20 for a week or so now (on SuSE 10.2), no problems so far.

eLRIC
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Janet : I ran a 2.6.21.5 with the rt14 patch whithout troubles (latest is rt20 so I think a few more bugs I haven't experienced may have been solved)

(btw, I don't know how to PM to provide you my email address if you want some more infos ... )

rdegraaf
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For older patches look...

Older patches are kept here:
http://people.redhat.com/mingo/realtime-preempt/older/

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