Re: # CONFIG_PREEMPT is not set
Is Realtime-lsm the same thing? I'm assuming no, as I have realtime-lsm on a 2.6.11 custom-built kernel for using a recording studio with...
Oliver Korpilla <Oliver.Korpilla@gmx.de> wrote :
> Tobias Krais schrieb:
> > I'm a kernel dummy, so I ask myself what the advantage von PREMPT is, so
>
> > that I should use it?
>
> PREEMPT enables the preemptible kernel, which means you can interrupt
> processes executing system calls in kernel mode, except when they are
> accessing stuff protected by a spin lock (and is modifying a global data
> structure - to avoid data corruption).
>
> It lowers the average latency when reacting to interrupts. Problem is,
> there seem to be some execution paths in the kernel that are pretty
> long. The low-latency-kernel teams tries to fix this.
>
> I personally observe that my Linux is much more responsive when
> displaying videos with preempt on.
>
> With kind regards,
> Oliver Korpilla
>
>
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