Messages in this thread | | | Date | Thu, 8 Aug 2002 12:18:51 -0700 | From | William Lee Irwin III <> | Subject | Re: further IO-APIC oddities |
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At some point in the past, I wrote: >> It's different from 2.5.29, I can follow up with that. 2.5.29 saw all 0's, >> so whatever it was that was scribbling over the MPC table and making the >> ID's all 0, it's scribbling on something else now (probably mem_map).
On Thu, Aug 08, 2002 at 11:14:06AM -0700, Martin J. Bligh wrote: > I thought that was only if you reduced NR_CPUS? And you shouldn't > need to read the IOAPIC tables to do that - the basic array was getting > overwritten. Or am I confusing at least two different bugs?
Sorry, I'm being obtuse. What I had in mind here was:
(1) there's been a longstanding bug where the MPC table entries with the IO-APIC ID's gets zeroed out (2) this bug mysteriously went away, even though we never tracked it down (3) bugs that smell of mem_map getting stomped on are cropping up
... and I suspect these three things are related, e.g. the MPC stuff moved or link order changed or some such Heisenbug-ish nonsense and now it's hitting something else. The NR_CPUS bit isn't even bootable (the panic() happens before console_init() IIRC) so it's not quite that one. =)
Cheers, Bill - 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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