Messages in this thread | | | Date | Tue, 20 Nov 2007 16:14:31 +0100 (CET) | From | Jan Engelhardt <> | Subject | VIA spurious hang on 2.6.23.1 |
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Hi,
I've got some semi-embedded device here, a plain consumer-grade x86 with a VIA Nehemiah/Eden C7. After a while it just locks up, but neither is that deterministic nor does it give out kernel messages. CPU Frequency Scaling (which has been known to be a problem with this CPU) is already disabled.
I tried the "nohz" boot option to but until it finally hangs (which may take hours or days) I can't say for sure whether it works. It shall be noticed that watching the interrupts in /proc/interrupts (using /usr/bin/watch e.g.) shows that the IRQ0 interrupt does not fire at 100 Hz, even with nohz, but more like 40-60 Hz. Also, the LOC line in /proc/interrupts is not increasing at all (presumable due to the APIC emulation).
dmesg: [ 0.000000] No local APIC present or hardware disabled [ 0.000000] mapped APIC to ffffb000 (011ec000) [ 39.983680] Local APIC not detected. Using dummy APIC emulation. [ 39.983426] CPU0: Centaur VIA Nehemiah stepping 08 [ 40.545396] PCI: VIA PCI bridge detected. Disabling DAC. [ 40.545564] PCI: Bypassing VIA 8237 APIC De-Assert Message [ 41.803665] PCI: VIA VLink IRQ fixup for 0000:00:0f.0, from 255 to 5
Ideas be welcome, although I guess it's pretty much trial-and-error on my side :( 2.6.21 seemed to be a last known good one, though I'd stick with a distro kernel as usual.
thanks, Jan - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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