Re: [MirageOS-devel] Unikernel crashes (compiled to Xen)

[Vittorio Cozzolino <vittorio.cozzolino@xxxxxxxxx>]

Hi,

I have a similar problem, as mentioned here 
https://github.com/mirage/mirage-skeleton/issues/251. Maybe they are 
correlated.
Best,
Vittorio


On 02-Feb-18 8:25 PM, Anil Madhavapeddy wrote:
> > On 2 Feb 2018, at 19:07, Richard Mortier <richard.mortier@xxxxxxxxxxxx> wrote:
> >
> > On 02/02/2018 18:17, Mindy Preston wrote:
> > > On 02/02/18 06:32, JIM Yuan wrote:
> > > > Hi,
> > > >
> > > > I installed Xen on Ubuntu 16.04 Server, which runs as a VM in VirtualBox 5.2.6 
> > > > on macOS.
> > > I think nested virtualization (running Xen within another hypervisor) is not 
> > > very well supported (perhaps someone more familiar with the current state of 
> > > nested virt in Xen can comment more?), and I'm not surprised that there are 
> > > problems with a unikernel that tries to use network resources there.  I would 
> > > recommend trying with a hypervisor running directly on hardware, not 
> > > virtualized itself.
> > FWIW that used to work, at least for me. I will admit to not having done it 
> > recently though, so perhaps somewhere in changes to OSX, Virtualbox, Xen and 
> > Mirage over the last year or two, things have changed.
> Indeed — this doesn’t look like a nested virt crash to me, since it has attached to netfront and is 
> crashing quite late in boot.  I’ll see if I can reproduce it later, as I’m suspicious that this might be 
> due to a change somewhere in newer Xen device models.  It’s hard to tell without a gdb backtrace for sure where 
> it’s crashing.
>
> Anil
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