Re: [Xen-devel] [PATCH v3 for-4.9] x86/emul: Poision the stubs with debug traps

2017-04-07 Thread Jan Beulich
>>> On 07.04.17 at 16:00, wrote: > ...rather than leaving fragments of old instructions in place. This reduces > the chances of something going further-wrong (as the debug trap will be > caught > and terminate the guest) in a cascade-failure where we end up executing the > instruction fragments.

[Xen-devel] [PATCH v3 for-4.9] x86/emul: Poision the stubs with debug traps

2017-04-07 Thread Andrew Cooper
...rather than leaving fragments of old instructions in place. This reduces the chances of something going further-wrong (as the debug trap will be caught and terminate the guest) in a cascade-failure where we end up executing the instruction fragments. Before: (XEN) d2v0 exception 6 (ec=