Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0

[Ingo Molnar]

* Florian Schmidt <mista.tapas@xxxxxxx> wrote:

> ah, and btw: what does the /proc/sys/kernel/kernel_preemption tunable
> do with PREEMPT_REALTIME enabled?

it's pretty pointless to offer this tunable, agreed. In theory one could
try to turn off involuntary preemption but what's the point?

> mango:~# cat /proc/sys/kernel/kernel_preemption 
> 1
> 
> [all the other VP tunables are not available anymore]
> 
> mango:~# cat /proc/sys/kernel/voluntary_preemption
> cat: /proc/sys/kernel/voluntary_preemption: No such file or directory
> mango:~# cat /proc/sys/kernel/hardirq_preemption
> cat: /proc/sys/kernel/hardirq_preemption: No such file or directory
> mango:~# cat /proc/sys/kernel/softirq_preemption
> cat: /proc/sys/kernel/softirq_preemption: No such file or directory

right - the PREEMPT_REALTIME kernel is only correct if all asynchronous
processing is done in a process context, so i removed those tunables.

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/