On 09/30/2010 08:37 AM, Alessio Igor Bogani wrote: > Hi Jeremy, > > 2010/9/30 Jeremy Jongepier <jer...@autostatic.com>: > [...] >> multimedia room with some Ubuntu machines). I've actually never seen a >> -realtime kernel, what's the difference from -rt? -lowlatency doesn't > > From a technical point of view -rt and -realtime are the same kernel. > A minor difference is that the -rt kernel offer the "really stable" > and upstream official release 2.6.31 whereas -realtime offers the last > official upstream release that is 2.6.33. But there are the same > kernel (that is PREEMPT_RT). The main difference is the external > support. In -rt I have tried to offer an usable system as like Ubuntu > do (so I have worked on compatibility with closed video drivers for > example like nvidia or fglrx) whereas with -realtime I don't enforce > it at all. > > In less words: if you need of closed video drivers, external DKMS > kernel modules, linux-backports-* you should probably start to use > -lowlatency (when it will be available through Ubuntu repos). Instead > if you really need of an real-time system you should avoid all above > or trying to make those working alone. >
Thanks for the explanation. Personally I don't care about external support and I'm very happy with the open source nouveau and radeon drivers. From a community perspective it's different though and I think we shouldn't loose that out of sight either. I'd really like to know how everyone else thinks about that, what is the common ground towards -rt/-realtime etc.? >> cut it for me, like I said, I need the tasklet API the -rt kernel >> provides so I can use rtirq. > > Probably you meant IRQ Threads. > I need the tasklet API the -rt kernel provides so I can use rtirq to prioritize IRQ threads ;) >> Concerning support, it would be best if there were kernels for every >> release simply because it would be a bummer if people would move away >> from Ubuntu because of this. > > That require a lot of energy. If a lot of people will be available for > help we could do it. > > Ciao, > Alessio > I understand and maybe my opinion on this was a bit premature. It maybe a good thing to think about how many Ubuntu users are actually using the -rt kernel and if it's really worth the effort in putting a lot of energy in maintaining these kernels. Best, Jeremy -- Ubuntu-Studio-users mailing list Ubuntu-Studio-users@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users
