From: Yonghong Song <yonghong.song@linux.dev>
To: Puranjay Mohan <puranjay@kernel.org>, bpf@vger.kernel.org
Cc: Puranjay Mohan <puranjay12@gmail.com>,
Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <martin.lau@kernel.org>,
Eduard Zingerman <eddyz87@gmail.com>,
Kumar Kartikeya Dwivedi <memxor@gmail.com>,
kernel-team@meta.com, Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH bpf-next v2 1/2] bpf: move recursion detection logic to helpers
Date: Thu, 18 Dec 2025 09:44:04 -0800 [thread overview]
Message-ID: <5c57bea2-a9ff-438d-a256-954e291670af@linux.dev> (raw)
In-Reply-To: <20251217233608.2374187-2-puranjay@kernel.org>
On 12/17/25 3:35 PM, Puranjay Mohan wrote:
> BPF programs detect recursion by doing atomic inc/dec on a per-cpu
> active counter from the trampoline. Create two helpers for operations on
> this active counter, this makes it easy to changes the recursion
> detection logic in future.
>
> This change makes no functional changes.
>
> Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
next prev parent reply other threads:[~2025-12-18 17:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-17 23:35 [PATCH bpf-next v2 0/2] bpf: Optimize recursion detection on arm64 Puranjay Mohan
2025-12-17 23:35 ` [PATCH bpf-next v2 1/2] bpf: move recursion detection logic to helpers Puranjay Mohan
2025-12-18 17:44 ` Yonghong Song [this message]
2025-12-17 23:35 ` [PATCH bpf-next v2 2/2] bpf: arm64: Optimize recursion detection by not using atomics Puranjay Mohan
2025-12-18 17:55 ` Yonghong Song
2025-12-19 16:40 ` Puranjay Mohan
2025-12-19 18:23 ` Puranjay Mohan
2025-12-18 2:52 ` [PATCH bpf-next v2 0/2] bpf: Optimize recursion detection on arm64 Puranjay Mohan
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