Yes I should have said CONFIG_PREEMPT + SMP + CONFIG_IRQ_FORCED_THREADING Basicly since BKL is gone in 2.6.39 and there is forced threading , a kernel built with preemption is good enough for a lot of stuff, one of which is the audio guys. In some cases a 2.6.39 with preempt is better than a 2.6.33-rt , it depends on hardware and drivers ...
A full RT-Preempt kernel gives a quite big performance hit since it's preemptible in spinlocks. Sorry, I hope I make more sense this time. / regards, Lars 2011/7/11 Ben Hutchings <b...@decadent.org.uk> > On Mon, 2011-07-11 at 13:14 +0100, Luis Henriques wrote: > > Hi, > > Lars Segerlund <lars.segerl...@gmail.com> writes: > > > > > Hi, > > > > > > Since it's possible to configure the kernel with the CONFIG_PREEMPT_RT > since > > > 2.6.39 ... ( mainline ) , it would be supernice if there were prebuilt > kernels > > > in debian ( sid ). > > > > > > I just wanted to point this out and here what everyone thought about > it. > > > > > > It would be a great boon for audio users, and for some RT tasks. > > > > > > / regards, Lars Segerlund. > > > > > > > Are you sure this is available on mainline? I couldn't find any > > references to it. AFAIK, its available only through the -rt patch. > > This is correct. > > > Also, the latest "official" version of this patch is 2.6.33.9-rt31, so > > there is no support for latter kernels. > > Right. We have had offers to maintain an 'rt' featureset for wheezy, > but that can only happen if the Linux-rt developers decide to create > their next branch from the same upstream kernel version we use for > wheezy. > > Ideally this would all get merged upstream and 'rt' could be just > another flavour, but this is happening quite slowly. > > Ben. > > -- > Ben Hutchings > It is easier to write an incorrect program than to understand a correct > one. >
