Re: test_and_set_bit() not atomic forever? [cli/sti in char/vt.c [patch]]

David Woodhouse (Dave@imladris.demon.co.uk)
Mon, 01 Jun 1998 07:33:08 +0100

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> On Sun, May 31, 1998 at 10:31:20PM +0100, Jamie Lokier wrote:
>
> > Perhaps a fixup table to convert all the `lock's to `nop's at
> > initialisation time?
>
> That's nonsense as only the SMP kernel uses the lock prefix.
>
> Ralf

The point was that lots of people are running SMP kernels on UP machines,
where it's gratuitous overhead.

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