From:   "Tomohiro Misono (Fujitsu)" <misono.tomohiro@fujitsu.com>
To:     "'madvenka@linux.microsoft.com'" <madvenka@linux.microsoft.com>,
        "jpoimboe@redhat.com" <jpoimboe@redhat.com>,
        "peterz@infradead.org" <peterz@infradead.org>,
        "chenzhongjin@huawei.com" <chenzhongjin@huawei.com>,
        "mark.rutland@arm.com" <mark.rutland@arm.com>,
        "broonie@kernel.org" <broonie@kernel.org>,
        "Keiya Nobuta (Fujitsu)" <nobuta.keiya@fujitsu.com>,
        "sjitindarsingh@gmail.com" <sjitindarsingh@gmail.com>,
        "catalin.marinas@arm.com" <catalin.marinas@arm.com>,
        "will@kernel.org" <will@kernel.org>,
        "jamorris@linux.microsoft.com" <jamorris@linux.microsoft.com>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "live-patching@vger.kernel.org" <live-patching@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [RFC PATCH v3 00/22] arm64: livepatch: Use ORC for dynamic frame
 pointer validation
Thread-Topic: [RFC PATCH v3 00/22] arm64: livepatch: Use ORC for dynamic frame
 pointer validation
Thread-Index: AQHZNtr2MNh0z0iEfEuTLgtmunaVUK7lZbhA
Date:   Wed, 1 Mar 2023 03:12:08 +0000
Deferred-Delivery: Wed, 1 Mar 2023 03:13:02 +0000
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References: <0337266cf19f4c98388e3f6d09f590d9de258dc7>
 <20230202074036.507249-1-madvenka@linux.microsoft.com>
In-Reply-To: <20230202074036.507249-1-madvenka@linux.microsoft.com>
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<snip>
> Testing
> =3D=3D=3D=3D=3D=3D=3D
>=20
> - 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
 =20
  --- 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

>=20
> - I have a test driver to induce a NULL pointer exception to make sure
>   that unwinding through exception handlers is reliable.
>=20
> - I use the test driver to create a timer to make sure that unwinding thr=
ough
>   the timer IRQ is reliable.
>=20
> - I call the unwinder from different places during boot to make sure that
>   the unwinding in each of those cases is reliable.
>