From: Markus Elfring <Markus.Elfring@web.de>
To: Vincent Donnefort <vdonnefort@google.com>,
linux-trace-kernel@vger.kernel.org, kernel-team@android.com,
kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
Joey Gouly <joey.gouly@arm.com>, Marc Zyngier <maz@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Oliver Upton <oliver.upton@linux.dev>,
Steven Rostedt <rostedt@goodmis.org>,
Suzuki Poulouse <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
John Stultz <jstultz@google.com>,
Quentin Perret <qperret@google.com>,
Will Deacon <will@kernel.org>
Subject: Re: [PATCH v13 03/32] ring-buffer: Introduce ring-buffer remotes
Date: Fri, 6 Mar 2026 17:37:35 +0100 [thread overview]
Message-ID: <677c7ad6-6e67-4011-b2d0-03d0d58547ce@web.de> (raw)
In-Reply-To: <20260306143536.339777-4-vdonnefort@google.com>
…
> It is expected from the remote to keep the meta-page updated.
See also once more:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v7.0-rc2#n94
…
> +++ b/kernel/trace/ring_buffer.c
…
> +int ring_buffer_poll_remote(struct trace_buffer *buffer, int cpu)
> +{
…
> + cpus_read_lock();
> +
> + /*
> + * Make sure all the ring buffers are up to date before we start reading
> + * them.
> + */
> + for_each_buffer_cpu(buffer, cpu) {
…
> + }
> +
> + cpus_read_unlock();
> +
> + return 0;
> +}
…
How do you think about to use another lock guard here?
https://elixir.bootlin.com/linux/v7.0-rc1/source/include/linux/cpuhplock.h#L48
Regards,
Markus
next prev parent reply other threads:[~2026-03-06 16:38 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-06 14:35 [PATCH v13 00/32] Tracefs support for pKVM Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 01/32] ring-buffer: Add page statistics to the meta-page Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 02/32] ring-buffer: Store bpage pointers into subbuf_ids Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 03/32] ring-buffer: Introduce ring-buffer remotes Vincent Donnefort
2026-03-06 16:37 ` Markus Elfring [this message]
2026-03-11 15:23 ` Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 04/32] ring-buffer: Add non-consuming read for " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 05/32] tracing: Introduce trace remotes Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 06/32] tracing: Add reset to " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 07/32] tracing: Add non-consuming read " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 08/32] tracing: Add init callback " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 09/32] tracing: Add events " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 10/32] tracing: Add events/ root files " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 11/32] tracing: Add helpers to create trace remote events Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 12/32] ring-buffer: Export buffer_data_page and macros Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 13/32] tracing: Introduce simple_ring_buffer Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 14/32] tracing: Add a trace remote module for testing Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 15/32] tracing: selftests: Add trace remote tests Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 16/32] Documentation: tracing: Add tracing remotes Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 17/32] tracing: load/unload page callbacks for simple_ring_buffer Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 18/32] tracing: Check for undefined symbols in simple_ring_buffer Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 19/32] KVM: arm64: Add PKVM_DISABLE_STAGE2_ON_PANIC Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 20/32] KVM: arm64: Add clock support to nVHE/pKVM hyp Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 21/32] KVM: arm64: Initialise hyp_nr_cpus for nVHE hyp Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 22/32] KVM: arm64: Support unaligned fixmap in the pKVM hyp Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 23/32] KVM: arm64: Add tracing capability for the nVHE/pKVM hyp Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 24/32] KVM: arm64: Add trace remote " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 25/32] KVM: arm64: Sync boot clock with " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 26/32] KVM: arm64: Add trace reset to " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 27/32] KVM: arm64: Add event support to the nVHE/pKVM hyp and trace remote Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 28/32] KVM: arm64: Add hyp_enter/hyp_exit events to nVHE/pKVM hyp Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 29/32] KVM: arm64: Add selftest event support " Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 30/32] tracing: selftests: Add hypervisor trace remote tests Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 31/32] fixup! tracing: Add a trace remote module for testing Vincent Donnefort
2026-03-06 14:35 ` [PATCH v13 32/32] " Vincent Donnefort
2026-03-09 1:45 ` [PATCH v13 00/32] Tracefs support for pKVM Steven Rostedt
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