I have a couple uniprocessor ICH5 systems from different vendors, with
similar behavior:
2.6: HyperThreading works, ACPI works, all irqs properly routed
2.4: HT works only works with ACPI enabled, but,
ACPI kills the irq routing for the external PCI slots.
pci=noacpi or whatever doesn't work. !CONFIG_ACPI + "noapic"
fixes irq routing, but then no HT sibling appears.
It seems like kernel 2.4.22-rc is missing some ACPI and possibly some
APIC fixes?
Jeff
Jeff,
I've seen word of a similar failure on VIA 8235, but on those I've got
neither the hardware nor the chipset documentation -- it would be great
if I could get this to fail on hardware I actually have...
BTW. The latest stuff in
http://linux-acpi.bkbits.net:8080/linux-acpi-2.4 should be able to boot
with acpi=ht, or you can build with just CONFIG_ACPI_HT, and that will
give you HT without any other parts of ACPI. Though if the platform has
no MPS, this option leaves the platform in XT-PIC mode since it doesn't
do IOAPIC discovery.
Feel free to dump the usual info into a kernel.org bug under
component=ACPI and assign it to me.
Thanks,
-Len
> -----Original Message-----
> From: Jeff Garzik [mailto:[email protected]]
> Sent: Monday, August 11, 2003 1:24 PM
> To: LKML
> Subject: Intel ICH5 APIC, ACPI problems in 2.4
>
>
> I have a couple uniprocessor ICH5 systems from different
> vendors, with
> similar behavior:
>
> 2.6: HyperThreading works, ACPI works, all irqs properly routed
>
> 2.4: HT works only works with ACPI enabled, but,
> ACPI kills the irq routing for the external PCI slots.
> pci=noacpi or whatever doesn't work. !CONFIG_ACPI + "noapic"
> fixes irq routing, but then no HT sibling appears.
>
> It seems like kernel 2.4.22-rc is missing some ACPI and possibly some
> APIC fixes?
>
> Jeff
>
>
>
> -
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>
Jeff Garzik <[email protected]> writes:
>I have a couple uniprocessor ICH5 systems from different vendors, with
>similar behavior:
>2.6: HyperThreading works, ACPI works, all irqs properly routed
>2.4: HT works only works with ACPI enabled, but,
> ACPI kills the irq routing for the external PCI slots.
> pci=noacpi or whatever doesn't work. !CONFIG_ACPI + "noapic"
> fixes irq routing, but then no HT sibling appears.
To give a datapoint:
ICH5 works like a breeze with RH 2.4.20-19.9 kernel:
% lspci -vt
-[00]-+-00.0 Intel Corp. 82865G [Springdale-G] Chipset Host Bridge
[...]
+-1f.1 Intel Corp. 82801EB ICH5 IDE
[...]
% cat /proc/cpuinfo | grep -i genuine | wc -l
2
% dmesg
Linux version 2.4.20-19.9smp ([email protected]) (gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #1 SMP Tue Jul 15 17:04:18 EDT 2003
[...]
ACPI: Searched entire block, no RSDP was found.
ACPI: RSDP located at physical address c00f5b40
RSD PTR v0 [ACPIAM]
ACPI table found: RSDT v1 [INTEL D865PERL 8195.1813]
ACPI table found: FACP v2 [INTEL D865PERL 8195.1813]
ACPI table found: APIC v1 [INTEL D865PERL 8195.1813]
LAPIC (acpi_id[0x0001] id[0x0] enabled[1])
CPU 0 (0x0000) enabledProcessor #0 Pentium 4(tm) XEON(tm) APIC version 16
LAPIC_NMI (acpi_id[0x0001] polarity[0x0] trigger[0x0] lint[0x1])
LAPIC (acpi_id[0x0002] id[0x1] enabled[1])
CPU 1 (0x0100) enabledProcessor #1 Pentium 4(tm) XEON(tm) APIC version 16
[...]
This is an intel 865 PERLK desktop board with a 2,6 GHz HT CPU. Even
the ICH5 serial ATA works which really had me impressed:
ICH5-SATA: IDE controller at PCI slot 00:1f.2
ICH5-SATA: chipset revision 2
ICH5-SATA: 100% native mode on irq 18
ide2: BM-DMA at 0xdc00-0xdc07, BIOS settings: hde:DMA, hdf:pio
ide3: BM-DMA at 0xdc08-0xdc0f, BIOS settings: hdg:pio, hdh:pio
hde: Maxtor 6Y120M0, ATA DISK drive
hde: attached ide-disk driver.
hde: host protected area => 1
hde: 240121728 sectors (122942 MB) w/7936KiB Cache, CHS=238216/16/63, UDMA(33)
(The UDMA(33) seems to be a lie, I can read ~ 57 MBytes/sec from this disk).
So there might be some patches in the RH kernel, that are missing from
2.4.22-rc2
Regards
Henning
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