RE: [RFC PATCH v3 00/22] arm64: livepatch: Use ORC for dynamic frame pointer validation

[Tomohiro Misono (Fujitsu)]

<snip>
> Testing
> =======
> 
> - I have run all of the livepatch selftests successfully. I have written a
>   couple of extra selftests myself which I will be posting separately
Hi,

What test configuration/environment you are using for test?
When I tried kselftest with fedora based config on VM, I got errors
because livepatch transition won't finish until signal is sent
(i.e. it takes 15s for every transition).

[excerpt from test result]
  ```
  $ sudo ./test-livepatch.sh
  TEST: basic function patching ... not ok
  
  --- expected
  +++ result
  @@ -2,11 +2,13 @@
   livepatch: enabling patch 'test_klp_livepatch'
   livepatch: 'test_klp_livepatch': initializing patching transition
   livepatch: 'test_klp_livepatch': starting patching transition
  +livepatch: signaling remaining tasks
   livepatch: 'test_klp_livepatch': completing patching transition
  ```

Thanks,
Tomohiro

> 
> - I have a test driver to induce a NULL pointer exception to make sure
>   that unwinding through exception handlers is reliable.
> 
> - I use the test driver to create a timer to make sure that unwinding through
>   the timer IRQ is reliable.
> 
> - I call the unwinder from different places during boot to make sure that
>   the unwinding in each of those cases is reliable.
>