On Mon, Nov 27, 2017 at 10:28:35AM -0800, Dave Hansen wrote: > On 11/27/2017 10:03 AM, Eduardo Valentin wrote: > > On top of VM crashes, on your branch: > > https://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-kaiser.git/log/?h=kaiser-414-tipwip-20171123 > > > > 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: > > > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/log/?h=auto-latest > > My tree from last week is ancient gunk at this point. :) OK, thanks for let me know, I will give it a shot on the tip tree today and send feed back. -- All the best, Eduardo Valentin
