[syslinux] CPU usage while at syslinux boot prompt

[Geert Stappers]

Op 20081117 om 20:34 schreef Ferenc Wagner:
> "H. Peter Anvin" <hpa at zytor.com> writes:
> > I guess I might put a HLT in *as an option* (because people *will*
> > complain that the serial port loses characters)
> 
> I get this very annoying dropout from the Xen hypervisor, and wonder:
> is this a problem of common serial hardware not supporting interrupt
> generation or a deeper theoretical one?  Can't you do reliable
> interrupt driver serial IO on common UARTs by principle? 

That implies setting up the entire interrupt system.
(FYI: not all the "PCs" have the same interrupt controller,
 but most the "PCs" have an  i8250 compatible UART)

> Doesn't the Linux kernel do this?

Euh yes, but the Syslinux project is about a bootloader.
(which mean there isn't yet a Linux kernel :-))


Cheers
Geert Stappers