On Mon, Feb 01, 2016 at 07:08:46PM +0300, Andrey Ryabinin wrote:
> > > > tried it on hangs the same way, really early. Any thoughts on how to
> > chase this down ?
> > > Try to disable instrumentation for early code, like in the patch bellow.
> > This didn't help.
>
> So after I enabled UBSAN_ALIGNMENT in your config, the kernel didn't boot.
> That is because unaligned access happens before lockdep_init() so ubsan
> callback takes the
> spinlock before locked_init() which is not allowed.
> Could you try it without CONFIG_DEBUG_LOCKDEP?
> Or alternatively with patch like this:
Tried with the patch, seems to work fine now.
thanks,
Dave
