* [PATCH] doc: kselftest: update for clarity on running kselftests in CI rings
@ 2019-08-27 0:07 Shuah Khan
2019-08-27 0:14 ` Shuah Khan
0 siblings, 1 reply; 2+ messages in thread
From: Shuah Khan @ 2019-08-27 0:07 UTC (permalink / raw)
To: shuah, corbet
Cc: Shuah Khan, linux-kselftest, linux-doc, linux-kernel, dan.rue,
anders.roxell
Update to add clarity and recommendations on running newer kselftests
on older kernels vs. matching the kernel and kselftest revisions.
The recommendation is "Match kernel revision and kselftest."
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
Documentation/dev-tools/kselftest.rst | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst
index 25604904fa6e..e55d9229fa8c 100644
--- a/Documentation/dev-tools/kselftest.rst
+++ b/Documentation/dev-tools/kselftest.rst
@@ -12,6 +12,31 @@ write new tests using the framework on Kselftest wiki:
https://kselftest.wiki.kernel.org/
+Recommendations on running kselftests in Continuous Integration test rings
+=========================================================================
+
+It is recommended that users run Kselftest from the same release. Running
+newer Kselftest on older kernels isn't recommended for the following
+reasons:
+
+- Kselftest from mainline and linux-next might not be stable enough to run
+ on stable kernels.
+- Kselftests detect feature dependencies at run-time and skip tests if a
+ feature and/or configuration they test aren't enabled. Running newer
+ tests on older kernels could result in a few too many skipped/failed
+ conditions. It becomes difficult to evaluate the results.
+- Newer tests provide better coverage. However, users should make a judgement
+ call on coverage vs. run to run consistency and being able to compare
+ run to run results on older kernels.
+
+Recommendations:
+
+Match kernel revision and kselftest. Especially important for LTS and
+Stable kernel Continuous Integration test rings.
+
+Hot-plug tests
+==============
+
On some systems, hot-plug tests could hang forever waiting for cpu and
memory to be ready to be offlined. A special hot-plug target is created
to run the full range of hot-plug tests. In default mode, hot-plug tests run
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] doc: kselftest: update for clarity on running kselftests in CI rings
2019-08-27 0:07 [PATCH] doc: kselftest: update for clarity on running kselftests in CI rings Shuah Khan
@ 2019-08-27 0:14 ` Shuah Khan
0 siblings, 0 replies; 2+ messages in thread
From: Shuah Khan @ 2019-08-27 0:14 UTC (permalink / raw)
To: shuah, corbet
Cc: linux-kselftest, linux-doc, linux-kernel, dan.rue, anders.roxell,
Shuah Khan
On 8/26/19 6:07 PM, Shuah Khan wrote:
> Update to add clarity and recommendations on running newer kselftests
> on older kernels vs. matching the kernel and kselftest revisions.
>
> The recommendation is "Match kernel revision and kselftest."
>
> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
> ---
> Documentation/dev-tools/kselftest.rst | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
> diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst
> index 25604904fa6e..e55d9229fa8c 100644
> --- a/Documentation/dev-tools/kselftest.rst
> +++ b/Documentation/dev-tools/kselftest.rst
> @@ -12,6 +12,31 @@ write new tests using the framework on Kselftest wiki:
>
> https://kselftest.wiki.kernel.org/
>
> +Recommendations on running kselftests in Continuous Integration test rings
> +=========================================================================
Sorry. I missed the "WARNING: Title underline too short."
Will send v2 with this corrected.
thanks,
-- Shuah
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