On Fri, 2005-08-05 at 21:02 +0800, lab liscs wrote:
> when linux kernel receives a packet from the netcard and the forwards it .
>
> the process can be viewed as a kernel process ?
>
> and if this process can be interrupted ?
>
> thanks a lot!!
When a packet is received from the kernel, this is first done by an
interrupt handler to just get the packet. Then the rest (forwarding) is
done by a tasklet. This tasklet can be run either by the softirqd (a
kernel thread) or at certain locations in the kernel. So this is not a
normal process and no it can not be preempted or scheduled out (it can
be interrupted by an interrupt though).
-- Steve
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