As requested, I've tested the Intrepid Ibex 8.10 Alpha 5 live-cd with kernel 2.6.27 on the same machine as my report on 2007-04-02 (Dell C521, AMD64, nForce4).
I can report that with kernel version 'Linux ubuntu 2.6.27-2-generic #1 SMP Thu Aug 28 17:18:43 UTC 2008 x86_64' and KVM version '1:72+dfsg- 1ubuntu2' the problem with spurious kernel messages about lost interrupts when using KVM is now _gone_. The virtualized operating systems are stable (survive some random web browsing and a compilation of git), and the only message I got in the kernel logs about KVM were these two lines: [ 823.003552] kvm: 8793: cpu0 unhandled rdmsr: 0x417 [ 824.618630] kvm: emulating exchange as write But, again, no messsages about 'rtc: lost some interrupts at 1024Hz.' Here are some of the relevant sections of the kernel log on this machine: [ 0.000000] ACPI: PM-Timer IO Port: 0x1008 [ 0.000000] ACPI: Local APIC address 0xfee00000 [ 0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1]) [ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1]) [ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0]) [ 0.000000] IOAPIC[0]: apic_id 2, version 0, address 0xfec00000, GSI 0-23 [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 14 global_irq 14 high edge) [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 15 global_irq 15 high edge) [ 0.000000] ACPI: IRQ9 used by override. [ 0.000000] ACPI: IRQ14 used by override. [ 0.000000] ACPI: IRQ15 used by override. [ 0.000000] Setting APIC routing to flat [ 0.000000] ACPI: HPET id: 0x10b9a201 base: 0xfeff0000 [ 0.000000] Using ACPI (MADT) for SMP configuration information [ 0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs [...] [ 0.000000] Kernel command line: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.gz quiet splash -- console-setup/layoutcode=be [ 0.000000] Initializing CPU#0 [...] [ 0.000000] TSC calibrated against PM_TIMER [ 0.000000] Detected 2204.602 MHz processor. [ 0.004000] spurious 8259A interrupt: IRQ7. [...] [ 0.004000] hpet clockevent registered [ 0.004000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4409.20 BogoMIPS (lpj=8818408) [...] [ 0.005640] using C1E aware idle routine [ 0.007178] ACPI: Core revision 20080609 [ 0.009141] ACPI: Checking initramfs for custom DSDT [ 0.364022] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 [ 0.368023] ..MP-BIOS bug: 8254 timer not connected to IO-APIC [ 0.368023] ...trying to set up timer (IRQ0) through the 8259A ... [ 0.368023] ..... (found apic 0 pin 0) ... [ 0.376023] ....... failed. [ 0.376023] ...trying to set up timer as Virtual Wire IRQ... [ 0.376023] ..... failed. [ 0.376023] ...trying to set up timer as ExtINT IRQ... [ 0.418551] ..... works. [ 0.418553] CPU0: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ stepping 02 [ 0.418559] Using local APIC timer interrupts. [ 0.420029] APIC timer calibration result 12526194 [ 0.420032] Detected 12.526 MHz APIC timer. [...] [ 0.526943] ACPI: EC: Look up EC in DSDT [ 0.568739] ACPI: Interpreter enabled [ 0.568747] ACPI: (supports S0 S1 S3 S4 S5) [ 0.568810] ACPI: Using IOAPIC for interrupt routing [ 0.620451] ACPI: PCI Root Bridge [PCI0] (0000:00) [...] [ 1.264670] hpet0: at MMIO 0xfeff0000, IRQs 2, 8, 31 [ 1.264685] hpet0: 3 32-bit timers, 25000000 Hz [ 1.268054] Switched to high resolution mode on CPU 0 [ 1.268212] Switched to high resolution mode on CPU 1 [ 1.271622] tracer: 1286 pages allocated for 65536 entries of 80 bytes [ 1.271632] actual entries 65586 [...] [ 1.271926] ACPI: RTC can wake from S4 [...] [ 2.248322] rtc_cmos 00:04: rtc core: registered rtc_cmos as rtc0 [ 2.248360] rtc0: alarms up to one year, y3k, hpet irqs -- When using kqemu, rtc: lost some interrupts at 1024Hz. https://bugs.launchpad.net/bugs/82149 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
