From: sashiko-bot@kernel.org
To: "Leo Yan" <leo.yan@arm.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: [PATCH 1/2] perf: arm_spe: Order padding before publishing AUX head
Date: Thu, 15 Oct 2026 16:03:32 +0000 [thread overview]
Message-ID: <sashiko-outbox-173126@kernel.org> (raw)
In-Reply-To: <20261015-add_barriers_for_perf_aux_output_skip-v1-1-5847d0578859@arm.com>
> The driver fills alignment gaps and calls perf_aux_output_skip(), which
> publishes the new aux_head without a memory barrier. A userspace
> consumer on another CPU can therefore observe the new head before the
> padding stores become visible.
>
> Add smp_wmb() between the padding stores and perf_aux_output_skip().
>
> Fixes: d5d9696b0380 ("drivers/perf: Add support for ARMv8.2 Statistical Profiling Extension")
> Assisted-by: LLM
> Signed-off-by: Leo Yan <leo.yan@arm.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261015-add_barriers_for_perf_aux_output_skip-v1-0-5847d0578859@arm.com?part=1
next prev parent reply other threads:[~2026-10-15 16:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-15 15:51 [PATCH 0/2] perf: Order SPE and TRBE padding before publishing AUX head Leo Yan
2026-10-15 15:51 ` [PATCH 1/2] perf: arm_spe: Order " Leo Yan
2026-10-15 16:03 ` sashiko-bot [this message]
2026-10-15 15:51 ` [PATCH 2/2] coresight: trbe: " Leo Yan
2026-10-15 16:09 ` sashiko-bot
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