Re: eth interrupts unavailable under xen

["Erik de Bruijn - BudgetDedicated.com" <Erik@BudgetDedicated.com>]

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Ian Pratt wrote:

>>Everything works with the native linux kernel, but under 
>>xen/xenlinux network devices are detected but they can't be used.
>>
>>Extracted from the below it seems that eth0 and eth1 do not 
>>show up in /proc/interrupts but do show up in the boot 
>>output. I'm able to configure the interfaces but they never 
>>send out a packet, let alone recieve anything. In the borked 
>>an the working system one NIC chipset is similar. We've never 
>>had problems with the NIC's before. XenLinux runs smooth on 
>>other hosts.
>>    
>>
>
>It sounds like an irq routing issue. Hopefully this will be fixed in a
>few weeks time with 2.1 when this code gets moved back to domain 0.
>  
>
Would be great!

>In the meantime, it might be interesting to see what a native 2.4.27
>kernel does on this machine as Xen's current code is closer to this than
>2.6.
>  
>
Ok, I'll try to give you an update on this later.

>Has the motherboard got an IOAPIC?
>  
>
Concluding from the following XEN output I'd say that it does:

(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
...
(XEN) ENABLING IO-APIC IRQs
(XEN) Setting 2 in the phys_id_present_map
(XEN) ...changing IO-APIC physical APIC ID to 2 ... ok.
(XEN) init IO_APIC IRQs
(XEN) ..TIMER: vector=0x41 pin1=2 pin2=0

Thanks for the feedback!

-- 
Kind regards,

Erik de Bruijn
BudgetDedicated

www.BudgetDedicated.com | Tel. +31 492 430559 | Fax. +31 492 663870 | Mob. +31 6 21856715 | Adres: Haagwinde 16 | Zipcode NL-5731 WD Mierlo

(XEN) Initialised 1023MB memory (262128 pages) on a 1023MB machine
(XEN) Xen heap size is 10780KB
(XEN) CPU0: Before vendor init, caps: 0383fbff c1c3fbff 00000000, vendor = 2
(XEN) CPU caps: 0383fbff c1c3fbff 00000000 00000000
(XEN) found SMP MP-table at 000fb820
(XEN) Memory Reservation 0xfb820, 4096 bytes
(XEN) Memory Reservation 0xf5dd0, 4096 bytes
(XEN) ACPI: RSDP (v000 AMI                                       ) @ 0x000fa4a0
(XEN) ACPI: RSDT (v001 AMIINT VIA_K7   0x00000010 MSFT 0x00000097) @ 0x3fff0000
(XEN) ACPI: FADT (v001 AMIINT VIA_K7   0x00000011 MSFT 0x00000097) @ 0x3fff0030
(XEN) ACPI: MADT (v001 AMIINT VIA_K7   0x00000009 MSFT 0x00000097) @ 0x3fff00c0
(XEN) ACPI: DSDT (v001    VIA   VIA_K7 0x00001000 MSFT 0x0100000d) @ 0x00000000
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
(XEN) Processor #0 Pentium(tm) Pro APIC version 16
(XEN) Using ACPI for processor (LAPIC) configuration information
(XEN) Intel MultiProcessor Specification v1.1
(XEN)     Virtual Wire compatibility mode.
(XEN) OEM ID: VIA      Product ID: VT5440B      APIC at: 0xFEE00000
(XEN) I/O APIC #2 Version 3 at 0xFEC00000.
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) Processors: 1
(XEN) Using scheduler: Borrowed Virtual Time (bvt)
(XEN) Initializing CPU#0
(XEN) Detected 1999.751 MHz processor.
(XEN) CPU0: Before vendor init, caps: 0383fbff c1c3fbff 00000000, vendor = 2
(XEN) CPU caps: 0383fbff c1c3fbff 00000000 00000000
(XEN) CPU0 booted
(XEN) enabled ExtINT on CPU#0
(XEN) ESR value before enabling vector: 00000080
(XEN) ESR value after enabling vector: 00000000
(XEN) Error: only one processor found.
(XEN) ENABLING IO-APIC IRQs
(XEN) Setting 2 in the phys_id_present_map
(XEN) ...changing IO-APIC physical APIC ID to 2 ... ok.
(XEN) init IO_APIC IRQs
(XEN) ..TIMER: vector=0x41 pin1=2 pin2=0
(XEN) Using local APIC timer interrupts.
(XEN) Calibrating APIC timer for CPU0...
(XEN) ..... CPU speed is 1999.6765 MHz.
(XEN) ..... Bus speed is 266.6235 MHz.
(XEN) ..... bus_scale = 0x00011111
(XEN) Time init:
(XEN) .... System Time: 12240679ns
(XEN) .... cpu_freq:    00000000:7731C988
(XEN) .... scale:       00000001:00082453
(XEN) .... Wall Clock:  1102528081s 140000us
(XEN) PCI: PCI BIOS revision 2.10 entry at 0xfdaf1, last bus=1
(XEN) PCI: Using configuration type 1
(XEN) PCI: Probing PCI hardware
(XEN) PCI: Probing PCI hardware (bus 00)
(XEN) PCI: Using IRQ router default [1106/3177] at 00:11.0
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen-ELF header found: 'GUEST_OS=linux,GUEST_VER=2.6,XEN_VER=2.0,VIRT_BASE=0xC0000000,LOADER=generic,PT_MODE_WRITABLE'
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Kernel image:  02800000->02d8ff78
(XEN)  Initrd image:  00000000->00000000
(XEN)  Dom0 alloc.:   03000000->0b000000
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0100000->c070b328
(XEN)  Init. ramdisk: c070c000->c070c000
(XEN)  Phys-Mach map: c070c000->c072c000
(XEN)  Page tables:   c072c000->c072f000
(XEN)  Start info:    c072f000->c0730000
(XEN)  Boot stack:    c0730000->c0731000
(XEN)  TOTAL:         c0000000->c0800000
(XEN)  ENTRY ADDRESS: c0100000
(XEN) Scrubbing DOM0 RAM: ..done.
(XEN) Scrubbing Free RAM: ...........done.



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