undefined instruction d5380001 (arm64 mrs emulation)

[Matthias Brugger]

On 10/06/2017 03:13 PM, Catalin Marinas wrote:
> On Fri, Oct 06, 2017 at 02:05:09PM +0200, Matthias Brugger wrote:
>> On 10/05/2017 06:16 PM, Catalin Marinas wrote:
>>> On Thu, Oct 05, 2017 at 04:54:09PM +0200, Matthias Brugger wrote:
>>>> We also hit this bug in openSUSE Tumbleweed:
>>>> https://bugzilla.suse.com/show_bug.cgi?id=1061188
>>>
>>> As Mark replied, we are still debating why this happens and whether the
>>> above fix is sufficient. As we were digging further, we realised there
>>> is no clear init level after which user space can be invoked, which
>>> means Suzuki's patch may not always be sufficient.
>>>
>>> I proposed something as a way of spotting this issue early [1] but I
>>> need to post it on the linux-arch to get some consensus.
>>>
>>> Can you post the full kernel log somewhere? I'm trying to figure out
>>> what trigged the modprobe during the kernel boot.
>>>
>>
>> You can find the kernel log here:
>> https://bugzilla.suse.com/attachment.cgi?id=743311
> 
> Thanks, it seems that ipv6 module loading triggered this.
> 
> Talking to Suzuki, we came to the conclusion that such thing cannot
> happen before rootfs_initcall, so his original core_initcall change
> should suffice. I'll push a patch out, hopefully for -rc4 and cc stable.
> 

Thanks for the info.
Matthias