APPLIED: [SRU][G][H][I][UNSTABLE][PATCH 0/1] selftests/ftrace: fix event-no-pid on 1-core machine

[Andrea Righi]

On Mon, Jul 05, 2021 at 05:47:32PM +0200, Krzysztof Kozlowski wrote:
> BugLink: https://bugs.launchpad.net/bugs/1927749
> 
> SRU Justification:
> 
> [Impact]
> 
> * Kernel selftests ftrace test fails on small machines which makes it
>   difficult/impossible to spot real ftrace failure.
> * Only 1-core CPUs are affected.
> * When running event-no-pid test on small machines (e.g. cloud 1-core
>   instance), other events might not happen.
> 
> [Fix]
> 
> * Schedule a simple sleep task to be sure that some other process events
>   get recorded.
> * Fix accepted in mainline (v5.14-rc1 merge window).
> 
> [Test Plan]
> 
> * Run ftrace test from kernel selftests.
> 
> [Where problems could occur]
> 
> * Only kernel selftests should be affected.
> * ftrace test can have false positives or negatives.

Applied to impish/linux (5.13).

Thanks,
-Andrea