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From: Gabriele Monaco <gmonaco@redhat.com>
To: Nam Cao <namcao@linutronix.de>,
	linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
	bpf@vger.kernel.org, Steven Rostedt <rostedt@goodmis.org>
Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>,
	Wen Yang <wen.yang@linux.dev>,
	Tobias Schaffner <tobias.schaffner@siemens.com>,
	Viktor Malik <vmalik@redhat.com>
Subject: Re: [PATCH v2 09/15] tools/rv: Copy stripped bpf_atomic.h from libarena
Date: Thu, 08 Oct 2026 09:00:54 +0000	[thread overview]
Message-ID: <4F009BB7-58C2-4AB1-8FEF-61FA4B5281A2@redhat.com> (raw)
In-Reply-To: <87ld89wtrx.fsf@yellow.woof>



Il 7 ottobre 2026 12:59:46 UTC, Nam Cao <namcao@linutronix.de> ha scritto:
>Gabriele Monaco <gmonaco@redhat.com> writes:
>> Add bpf_atomic.h including atomic read/write macros like READ_ONCE() and
>> try_cmpxchg(). This version is a stripped down copy of the one currently
>> present in selftests/bpf/libarena.
>
>Instead of this, what do you think about using C11's atomic stuffs? I
>prefer standardized stuff when it is an option.

Mmh, I'm not too familiar with them, but they wouldn't be drop-in replacements as far as I understand. I'd need to use C11 atomic types and that would diverge further from the kernel implementation.

Ideally I wouldn't like to copy libarena's implementation but I couldn't find a cleaner way to include it.

I'm going to look into that more carefully though.

Thanks,
Gabriele


  reply	other threads:[~2026-10-08  9:02 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-01 15:20 [PATCH v2 00/15] rv: Add support for BPF monitors Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 01/15] sched: Add task enqueue/dequeue trace points Gabriele Monaco
2026-10-01 15:49   ` Peter Zijlstra
2026-10-02  7:09     ` Gabriele Monaco
2026-10-02 10:29       ` Peter Zijlstra
2026-10-02 11:55         ` Gabriele Monaco
2026-10-02 19:18           ` Peter Zijlstra
2026-10-02 19:40             ` Gabriele Monaco
2026-10-04  7:57             ` Steven Rostedt
2026-10-04  7:45         ` Steven Rostedt
2026-10-02  0:42   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 02/15] tools/rv: Skip empty pid error in selftest if command failed Gabriele Monaco
2026-10-02  0:42   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 03/15] rv: Refactor da_trace() functions to get strings internally Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 04/15] rv: Cast result of model_get_*_name() Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 05/15] tools/rv: Move argument parsing from in_kernel to utils Gabriele Monaco
2026-10-02  0:25   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 06/15] tools/build: Add a feature test for bpftool-btf Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 07/15] tools/rv: Implement BPF monitor discovery and listing Gabriele Monaco
2026-10-02  0:42   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 08/15] tools/rv: Implement BPF monitor loading and tracing Gabriele Monaco
2026-10-02  0:43   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 09/15] tools/rv: Copy stripped bpf_atomic.h from libarena Gabriele Monaco
2026-10-02  0:42   ` bot+bpf-ci
2026-10-07 12:59   ` Nam Cao
2026-10-08  9:00     ` Gabriele Monaco [this message]
2026-10-08 11:16       ` Nam Cao
2026-10-09 10:09         ` Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 10/15] tools/rv: Add BPF monitors Gabriele Monaco
2026-10-02  0:43   ` bot+bpf-ci
2026-10-06 13:29   ` Alexei Starovoitov
2026-10-08  9:54     ` Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 11/15] tools/rv: Define CONFIG_X86_64 statically for " Gabriele Monaco
2026-10-01 15:20 ` [PATCH v2 12/15] tools/rv: Add reactors support to " Gabriele Monaco
2026-10-02  0:43   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 13/15] verification/rvgen: Add support for " Gabriele Monaco
2026-10-02  0:25   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 14/15] tools/rv: Add selftest for rv bpf monitors Gabriele Monaco
2026-10-02  0:43   ` bot+bpf-ci
2026-10-01 15:20 ` [PATCH v2 15/15] verification/rvgen: Add selftest for rvgen -b Gabriele Monaco

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