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On Thursday 21 Sivan 5771 10:42:15 Rui Nuno Capela wrote: > On 06/23/2011 07:17 AM, Ralf Mardorf wrote: > > I used the config from the self-build kernel 2.6.33.9-rt31 and run > > oldconfig only to configure 2.6.39. I didn't make music until now using > > this kernel. Yes, I wish to "emulate" the PREEMPT_RT, since common > > PREEMPT only kernels never did, what I needed. > > > > What do I need to set? > > > > $ cat config-2.6.39.1 | grep PREEMPT > > CONFIG_TREE_PREEMPT_RCU=y > > CONFIG_PREEMPT_RCU=y > > CONFIG_PREEMPT_NOTIFIERS=y > > # CONFIG_PREEMPT_NONE is not set > > # CONFIG_PREEMPT_VOLUNTARY is not set > > CONFIG_PREEMPT=y > > > > IIUC this is correct?! > > yes. > > and don't forget to add "threadirqs" to your kernel bootloader > line--only then you'll get "rtirq" to do its magic as it used to do on a > genuine -rt kernel. > > > PS: SCHED_FF? > > SCHED_FF is a process/thread attribute, not a kernel configuration > option--jack does that for you when told to run with realtime scheduling. > This is what I get from a plain Debian kernel: david@dovidhalevi:~$ grep PREEMPT /boot/config-2.6.39-1-686-pae # CONFIG_PREEMPT_RCU is not set CONFIG_PREEMPT_NOTIFIERS=y # CONFIG_PREEMPT_NONE is not set CONFIG_PREEMPT_VOLUNTARY=y # CONFIG_PREEMPT is not set david@dovidhalevi:~$ grep IRQ_FORCE /boot/config-2.6.39-1-686-pae CONFIG_IRQ_FORCED_THREADING=y Probably not enough. |
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