Hello:
This patch was applied to bpf/bpf.git (master)
by Alexei Starovoitov <ast@xxxxxxxxxx>:
On Tue, 9 Sep 2025 18:49:59 +0000 you wrote:
> Currently, out of all 3 types of waiters in the rqspinlock slow path
> (i.e., pending bit waiter, wait queue head waiter, and wait queue
> non-head waiter), only the pending bit waiter and wait queue head
> waiters apply deadlock checks and a timeout on their waiting loop. The
> assumption here was that the wait queue head's forward progress would be
> sufficient to identify cases where the lock owner or pending bit waiter
> is stuck, and non-head waiters relying on the head waiter would prove to
> be sufficient for their own forward progress.
>
> [...]
Here is the summary with links:
- [bpf,v2] rqspinlock: Choose trylock fallback for NMI waiters
https://git.kernel.org/bpf/bpf/c/0d80e7f951be
You are awesome, thank you!
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