Re: [PATCH bpf-next v2 0/6] Limited queueing in NMI for rqspinlock

[patchwork-bot+netdevbpf@kernel.org]

Hello:

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

On Fri, 28 Nov 2025 23:27:56 +0000 you wrote:
> Ritesh reported that he was frequently seeing timeouts in cases which
> should have been covered by the AA heuristics. This led to the discovery
> of multiple gaps in the current code that could lead to timeouts when
> AA heuristics could work to prevent them. More details and investigation
> is available in the original threads. [0][1]
> 
> This set restores the ability for NMI waiters to queue in the slow path,
> and reduces the cases where they would attempt to trylock. However, such
> queueing must not happen when interrupting waiters which the NMI itself
> depends upon for forward progress; in those cases the trylock fallback
> remains, but with a single attempt to avoid aimless attempts to acquire
> the lock.
> 
> [...]

Here is the summary with links:
  - [bpf-next,v2,1/6] rqspinlock: Enclose lock/unlock within lock entry acquisitions
    https://git.kernel.org/bpf/bpf-next/c/beb7021a6003
  - [bpf-next,v2,2/6] rqspinlock: Perform AA checks immediately
    https://git.kernel.org/bpf/bpf-next/c/5860f5ce479f
  - [bpf-next,v2,3/6] rqspinlock: Use trylock fallback when per-CPU rqnode is busy
    https://git.kernel.org/bpf/bpf-next/c/81d5a6a43859
  - [bpf-next,v2,4/6] rqspinlock: Disable spinning for trylock fallback
    https://git.kernel.org/bpf/bpf-next/c/30dc2f7025fe
  - [bpf-next,v2,5/6] rqspinlock: Precede non-head waiter queueing with AA check
    https://git.kernel.org/bpf/bpf-next/c/087849cca31d
  - [bpf-next,v2,6/6] selftests/bpf: Add success stats to rqspinlock stress test
    https://git.kernel.org/bpf/bpf-next/c/3448375e71a4

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html