On 11/27/2017 10:03 AM, Eduardo Valentin wrote:
> On top of VM crashes, on your branch:
> I am also getting crashes in early userspace, during tlb flushes. When KAISER is enabled and whenever userspace is loaded, I get a stack trace around __do_page_fault() called from restore_regs_and_return_to_kernel(). I saw this very same behavior in your v3 branch (kaiser-414-tipwip-20171121) too.
> The crashes are followed by a machine halt via NMI. They also get the following warning:
> WARNING: can't dereference iret registers at fffffffffe198048 for ip page_fault+0x11/0x60
There was a known bug in my branch with not mapping some of the
interrupt entry routines. Random alignment makes it break or work.
Ingo/Thomas, correct me if I'm wrong, but I think we need folks testing
here at the moment:
My tree from last week is ancient gunk at this point. :)