BTW: One optimization that the Linux kernel console is probably doing is
not necessarily drawing and scrolling on every new line of output, but
only on an explicit flush.
It is common that most run-time environments flush on a newline (when
writing to stdout), but not necessarily on every newline, but maybe only
on the last newline of the given print statement.
Maybe this is a way to do some cheap and conservative optimizations for
our kernel console as well, at the expense of some output buffering on
the "stdout" side in the kernel. Of course, critical kernel messages
need to be printed in the "stderr" style with implicit flushes after
every character like now.
I'm not sure how much would this actually help and whether it is worth
the complications.
M.D.
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