Re: # CONFIG_PREEMPT is not set
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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