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Re: Panic on CPU 0: FATAL TRAP: vec 7, #NM[0000]
- To: Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>, ChrisD <chris@xxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 20 Jul 2022 13:28:30 +0200
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- Cc: Michael Young <m.a.young@xxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 20 Jul 2022 11:28:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 20.07.2022 12:02, Andrew Cooper wrote:
> On 20/07/2022 09:19, Jan Beulich wrote:
>> On 20.07.2022 06:48, ChrisD wrote:
>>> So, you think it's a problem with fc36?
>> Well, if that's where the binary came from, then yes.
>
> So
> https://kojipkgs.fedoraproject.org//packages/xen/4.16.1/4.fc36/data/logs/x86_64/build.log
> is the build log.
>
> For iommu_init.c I don't see anything overly concerning, although the
> quantity of nonsense on the gcc cmdline is speaks volumes.
>
> One observation though. We do pass -mno-sse but not -mno-mmx.
Right, but that should be no problem - the compiler isn't supposed
to enable MMX without -mmmx.
Jan
> I still
> can't figure out what makes the compiler think there's any SIMD to be
> done in this function.
>
> ~Andrew
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