Messages in this thread | | | Date | Fri, 05 Jun 2009 19:24:58 -0600 | From | Robert Hancock <> | Subject | Re: only a single core (out of 8) initialized |
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david@lang.hm wrote: > On Thu, 4 Jun 2009, Andrew Morton wrote: > >> Subject: Re: only a single core (out of 8) initialized >> >> On Thu, 4 Jun 2009 19:52:36 -0700 (PDT) david@lang.hm wrote: >> >>> this is 2.6.30-rc7 >> >> Were any earlier kernels OK? >> >>> with a patch added to debug a nv sata driver >>> incompatibility with the Intel SSDs on a tyan motherboard >>> >>> on one system it sees all 8 cores, on the other system it only >>> initializes >>> one core. >>> >>> can anyone help me spot what's going wrong in the one that's only >>> seeing a >>> single core? If I'm reading things correctly it's seeing both sockets >>> for >>> the NUMA setup, but then only initializing one core on the first socket. >> >> good: >> SMP: Allowing 8 CPUs, 4 hotplug CPUs >> >> bad: >> SMP: Allowing 1 CPUs, 0 hotplug CPUs >> >> perhaps due to >> ACPI: No APIC-table, disabling MPS >> >> You could have a poke around in arch/x86/kernel/smpboot.c() and find >> out what happened here. I'd be suspecting this code triggered: >> >> /* no processor from mptable or madt */ >> if (!num_processors) >> num_processors = 1; >> >> because ACPI doesn't like that board. >> >> Did you look into updating the BIOS? > > this is actually the newer of the two systems. I've already escalated up > to Tyan about the fact that this board won't see the Intel SSD drives > (unless you hotplug the drive). I've forwarded this to them as well. > their website does show a newer bios than what was shipped to me.
Yeah, it seems like a BIOS problem on that system. It's missing a bunch of the ACPI tables that the other system has.
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