Re: ide-scsi and SMP does not work together.

From: Mikael Pettersson
Date: Wed Nov 05 2003 - 09:44:05 EST

Klaus Umbach writes:
> Hello Support Center :-)
> Since I have 2 CPUs on my mainboard and compiled the SMP-support in, I
> cannot use ide-scsi anymore. I guess it must have something to do with
> apic, because when I use "Local APIC support on uniprocessors", I have
> the same problem. With no SMP and no local APIC everything works fine.
> (except the second CPU, of course). Normal ide-cdrom support works, but
> recording CDs over atapi is not really what I want at the moment.
> Mainboard: MSI 694D pro
> 00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 10)

SMP by default uses the I/O-APIC, and may (depending on kernel version
and .config) also use ACPI, which in turn may trigger ACPI-controlled
PCI IRQ routing.

Try "acpi=off", "pci=noacpi" (or however that don't-use-ACPI-for-PCI
option is spelled), and "noapic" (don't use I/O-APIC).

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