From: sashiko-bot@kernel.org
To: "Jaidev Shastri" <jaidevshastri@vt.edu>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 1/3] perf/core: publish the aux_event link with release semantics
Date: Tue, 22 Sep 2026 01:24:14 +0000 [thread overview]
Message-ID: <20260922012415.04C371F000FF@smtp.kernel.org> (raw)
In-Reply-To: <20260921-mb-perf-core-v1-1-ac56a719c02b@vt.edu>
> From: Jaidev Shastri <jaidevshastri@vt.edu>
>
> perf_get_aux_event() links an aux_output event to its group leader with
> a plain store to event->aux_event once the leader has been validated.
> perf_aux_output_begin() and the AUX sample path read the link with plain
> loads, from the PMU interrupt on the CPU the event is scheduled on.
>
> Store the link with smp_store_release() and read it with
> smp_load_acquire(), so that a reader that sees the link also sees the
> state of the leader it points at.
>
> Found with MBCheck, a static herd7-based memory consistency checker.
>
> Signed-off-by: Jaidev Shastri <jaidevshastri@vt.edu>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260921-mb-perf-core-v1-0-ac56a719c02b@vt.edu?part=1
next prev parent reply other threads:[~2026-09-22 1:24 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-22 1:13 [PATCH 0/3] perf/core: order three publications against their readers Jaidev Shastri via B4 Relay
2026-09-22 1:13 ` [PATCH 1/3] perf/core: publish the aux_event link with release semantics Jaidev Shastri via B4 Relay
2026-09-22 1:24 ` sashiko-bot [this message]
2026-09-22 1:13 ` [PATCH 2/3] perf/core: install the guest callbacks before the guest_state gate Jaidev Shastri via B4 Relay
2026-09-22 1:25 ` sashiko-bot
2026-09-22 1:13 ` [PATCH 3/3] perf/core: publish perf_event_cache with release semantics Jaidev Shastri via B4 Relay
2026-09-22 1:24 ` sashiko-bot
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