why did Ubuntu turn off kernel preemption in Edgy?

Rui Tiago Cação Matos tiagomatos at gmail.com
Mon Nov 27 00:57:59 GMT 2006

On Dom, 2006-11-26 at 19:11 -0500, Ben Collins wrote:
> Because a lot of laptops didn't like this setup. It caused an increase
> in timer related interrupts, which resulted in a significant decrease in
> batter life.

And why not have a laptop-battery-friendly kernel version then? What do
the likes of Fedora and openSuSE do about this issue? Why not fix those
timer related interrupt problems instead? Are the lkml hackers aware of

> For feisty, I'm considering a low latency targeted kernel for audio
> users. However, I'm a little reluctant, mainly because I never hear from
> any of the multimedia users (like you) who are interested in this sort
> of functionality until after we release, which for me means I wont get
> any testing on these kernels until after it's too late to fix things.

Even though I'm not what I think you consider an 'audio user' I notice
hickups on rhythmbox's output everytime my disk is hit more often. This
is unacceptable, we are in 2006 and this is not rocket science nor does
it need 'secret' hardware specs to get working. So, to answer you, yes
you'll have testers. I'm actually already running feisty with 2.6.19.


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