Re: [bpf-next 0/4] selftests/bpf: fix for bpf_signal stalls, watchdog for test_progs

[patchwork-bot+netdevbpf@kernel.org]

Hello:

This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@kernel.org>:

On Tue, 12 Nov 2024 03:09:02 -0800 you wrote:
> Test case 'bpf_signal' had been recently reported to stall, both on
> the mailing list [1] and CI [2]. The stall is caused by CPU cycles
> perf event not being delivered within expected time frame, before test
> process enters system call and waits indefinitely.
> 
> This patch-set addresses the issue in several ways:
> - A watchdog timer is added to test_progs.c runner:
>   - it prints current sub-test name to stderr if sub-test takes longer
>     than 10 seconds to finish;
>   - it terminates process executing sub-test if sub-test takes longer
>     than 120 seconds to finish.
> - The test case is updated to await perf event notification with a
>   timeout and a few retries, this serves two purposes:
>   - busy loops longer to increase the time frame for CPU cycles event
>     generation/delivery;
>   - makes a timeout, not stall, a worst case scenario.
> - The test case is updated to lower frequency of perf events, as high
>   frequency of such events caused events generation throttling,
>   which in turn delayed events delivery by amount of time sufficient
>   to cause test case failure.
> 
> [...]

Here is the summary with links:
  - [bpf-next,1/4] selftests/bpf: watchdog timer for test_progs
    https://git.kernel.org/bpf/bpf-next/c/d9d4d127e813
  - [bpf-next,2/4] selftests/bpf: add read_with_timeout() utility function
    https://git.kernel.org/bpf/bpf-next/c/03066ed3105a
  - [bpf-next,3/4] selftests/bpf: allow send_signal test to timeout
    https://git.kernel.org/bpf/bpf-next/c/3209139d00e5
  - [bpf-next,4/4] selftests/bpf: update send_signal to lower perf evemts frequency
    https://git.kernel.org/bpf/bpf-next/c/4edab4c55d2d

You are awesome, thank you!
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