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xen-devel
Re: [Xen-devel] iommu=0 leading to panic when system defaults to using
On 14/12/2010 17:52, "Yinghai Lu" <yinghai@xxxxxxxxxx> wrote:
> On 12/14/2010 09:08 AM, Jan Beulich wrote:
>>>>> On 14.12.10 at 17:53, "Kay, Allen M" <allen.m.kay@xxxxxxxxx> wrote:
>>>> And why is it that Xen panics when the BIOS pre-enabled x2apic
>>>> mode without also enabling interrupt re-mapping, while Linux
>>>> (afaict from looking at 2.6.32 code and output from an affected
>>>> machine) simply enables interrupt re-mapping in this case?
>>>
>>> AFAIK, Linux also requires interrupt remapping for x2apic. I believe
>>> Weidong has fixed the panic issue in Xen when x2apic is enabled without
>>> enabling interrupt remapping. It should now behave the same way as Linux.
>>
>> Oh, and I should have added that I'm currently polishing up
>> patches from Yinghai Lu to address this as well as other
>> problems preventing (certain?) large boxes from booting or
>> functioning correctly.
>
> Yes, just want to make xen aligned to current Linux kernel behavior.
> BIOS guys said why Linux non-xen kernel is happy but xen kernel is not.
>
> please check attached patches. Our big box with x2apic-preenabled, AND half
> cpus' apic id are above 255.
>
> They are on top of xen-4.0.1. and first one is from Weidong in unstable.
I assume Jan is going to help with posting these as a regular patch series
for inclusion, with separate patches for 4.0 and 4.1 as appropriate.
-- Keir
> Thanks
>
> Yinghai Lu
>
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- Re: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, (continued)
- RE: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Jan Beulich
- Re: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Weidong Han
- Re: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Jan Beulich
- RE: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Kay, Allen M
- RE: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Jan Beulich
- RE: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Jan Beulich
- Re: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Yinghai Lu
- Re: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic,
Keir Fraser <=
- Re: [Xen-devel] iommu=0 leading to panic when system defaults to using x2apic, Jan Beulich
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