What's the likely latency between IRQ sent and process starts running?
Last time I looked even a realtime process which is sleeping won't be
scheduled immediately if a lower priority process is banging the CPU.
> > Note: I'm not saying that this is the way networking should be done!
> > It's just something that I noticed you could do if you wanted.
>
> I still don't think it should be a syscall - an ioctl on /dev/mem maybe
But that then requires privileges: /dev/mem isn't something you'd let
every process peek at. I don't see why a simple memory tester needs to
be suid-root (or sgid-root).
Is your concern about a syscall that the number of syscalls is
limited? In that case the syscall could be renamed to something more
generic and take a command argument. Alternatively a new device file
could be created which everyone could access.
Regards,
Richard....
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