Re: regression - 2.6.36 -> 2.6.37 - kvm - 32bit SMP guests don'tboot

From: Nikola Ciprich
Date: Mon Feb 28 2011 - 10:30:10 EST


On Mon, Feb 28, 2011 at 10:17:24AM -0500, Zachary Amsden wrote:
> On 02/28/2011 09:32 AM, Nikola Ciprich wrote:
>>> Does the bug you are hitting manifest on both Intel and AMD platforms?
>>>
>> I don't have any AMD box here, I'll try this out at my home box.
>>
>>
>>> Further, do the systems you are hitting this on have stable or unstable
>>> TSCs?
>>>
>> how do I find this out? I don't see any warning about TSC in guest, but I've
>> just started it..
>> n.
>
> Before worrying about the guest, is the host TSC stable? What is the
> host clocksource?
not sure, I'm not setting anything specifically, is this snippet of dmesg relevant:

[ 1.148829] HPET: 8 timers in total, 5 timers will be used for per-cpu timer
[ 1.148934] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 40, 41, 42, 43, 44, 0
[ 1.149331] hpet0: 8 comparators, 64-bit 14.318180 MHz counter
[ 1.151831] hpet: hpet2 irq 40 for MSI
[ 1.151962] hpet: hpet3 irq 41 for MSI
[ 1.155930] hpet: hpet4 irq 42 for MSI
[ 1.159937] hpet: hpet5 irq 43 for MSI
[ 1.163943] hpet: hpet6 irq 44 for MSI
[ 1.175955] Switching to clocksource tsc

so I guess I'm using hpet?
n.


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