undefined instruction d5380001 (arm64 mrs emulation)

[Catalin Marinas]

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.

-- 
Catalin