Messages in this thread | | | Subject | Re: Can we kill f inb_p, outb_p and other random I/O on port 0x80, in 2.6? | From | (Eric W. Biederman) | Date | 22 Sep 2003 13:09:18 -0600 |
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Jamie Lokier <jamie@shareable.org> writes:
> Arjan van de Ven wrote: > > The first person to complain about the extra branch miss in udelay for > > this will get laughed at by me ;) > > udelay(1) is too slow on a 386 even without the branch miss.
Hmm. I will have to test that one.
> If you think I/O operations are infinitely slower than other > instructions, please explain why there is asm-optimised I/O code in > asm-i386/floppy.h. > > :)
Because the kernel was initially written in assembly and then fixed?
Eric
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