[ardour-users] OT - 2.6.11 kernels for audio

Joe Button ardour at joebutton.co.uk
Mon Apr 11 13:40:37 PDT 2005

On Monday 11 April 2005 21:21, Mark Knecht wrote:
> Last October there were 4 patches that I
> applied. I've forgotten what they all do:
> 1) I started with 2.6.8 from kernel.org I believe

The vanilla stable kernel

> 2) Added 2.6.9_rc2 which I think got 2.6.8 up to 2.6.9_rc2.

Release candidate for the next stable release

> 3) I added 2.6.9-rc2-mm4 - I don't know what that is.

Andrew Morton's testbed for new / experimental patches

> 4) I then added VP-2.6.9-rc2-mm4-S7. I think that was Ingo's patch

Yep, voluntary preempt patch

> 5) Lastly I added the LSM patch - realtime-lsm- which I guess

Not actually a patch against the kernel, rather an additional kernel module. 
This is what lets you run jackd realtime as a user.

> What part of those is still required?

These days you really just need the vanilla kernel + realtime LSM. Apparently 
2.6.12rc2 is significantly better than 2.6.11 latencywise.

You can also add the realtime-preempt patch (which used to be called the 
voluntary preempt patch) for even better performance:


Good luck, HTH

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