linux-kernel - Re: [PATCH] perf/aux: Properly launch pending disable flow

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Message-ID: <aEb2PZHb6c175uPy@e129823.arm.com>
Date: Mon, 9 Jun 2025 15:57:01 +0100
From: Yeoreum Yun <yeoreum.yun@....com>
To: Leo Yan <leo.yan@....com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Marco Elver <elver@...gle.com>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	James Clark <james.clark@...aro.org>,
	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf/aux: Properly launch pending disable flow

Hi Leo,

[...]
> --- a/kernel/events/ring_buffer.c
> +++ b/kernel/events/ring_buffer.c
> @@ -441,7 +441,7 @@ void *perf_aux_output_begin(struct perf_output_handle *handle,
>  		 * store that will be enabled on successful return
>  		 */
>  		if (!handle->size) { /* A, matches D */
> -			event->pending_disable = smp_processor_id();
> +			perf_event_disable_inatomic(handle->event);
>  			perf_output_wakeup(handle);
>  			WRITE_ONCE(rb->aux_nest, 0);
>  			goto err_put;
> @@ -526,7 +526,7 @@ void perf_aux_output_end(struct perf_output_handle *handle, unsigned long size)
>
>  	if (wakeup) {
>  		if (handle->aux_flags & PERF_AUX_FLAG_TRUNCATED)
> -			handle->event->pending_disable = smp_processor_id();
> +			perf_event_disable_inatomic(handle->event);
>  		perf_output_wakeup(handle);
>  	}

LGTM.

Reviewed-by: Yeoreum Yun <yeoreum.yun@....com>

--
Sincerely,
Yeoreum Yun