Re: interrupt&syscall

[Sourav Sen <sourav@csa.iisc.ernet.in>]

> 
> You can no preempt a process running in kernel mode.  The kernel
> is not preemptive, yet.  Note however that you also have boxes
> with multiple cpu's, and that you require more locking there.

	Does this mean that when I do a system call and the network 
card send an interrupt, it waits until the syscall returns?
> 
> Interupts will always use the kernel stack of the currently
> running process.
> 
> If you raising the interrupt priority level, the interrupt has to
> wait until you lower it again.

	Ok, But how I raise an interrupt priority level in x86, does it
has something to do with the IO-APIC?
> 
> Hope this helps.
> 
> 
> Kurt
> 

--
sourav

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