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

Tomohiro Misono (Fujitsu)
2023-03-01T03:16:38Z

<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.
>