linux-kernel - Re: [PATCH] perf Documentation: Correct branch stack sampling call-stack option

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Message-ID: <e2a105fc-8b5c-4c7d-ba29-de8bb560cc85@linux.intel.com>
Date: Wed, 7 Jan 2026 08:58:53 +0800
From: "Mi, Dapeng" <dapeng1.mi@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>,
 Adrian Hunter <adrian.hunter@...el.com>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
 Zide Chen <zide.chen@...el.com>, Falcon Thomas <thomas.falcon@...el.com>,
 Dapeng Mi <dapeng1.mi@...el.com>, Xudong Hao <xudong.hao@...el.com>,
 stable@...r.kernel.org
Subject: Re: [PATCH] perf Documentation: Correct branch stack sampling
 call-stack option

@Arnaldo, @Kim, @Ian

Kindly ping ... 

On 12/16/2025 9:39 AM, Dapeng Mi wrote:
> The correct call-stack option for branch stack sampling should be "stack"
> instead of "call_stack". Correct it.
>
> $perf record -e instructions -j call_stack -- sleep 1
> unknown branch filter call_stack, check man page
>
>  Usage: perf record [<options>] [<command>]
>     or: perf record [<options>] -- <command> [<options>]
>
>     -j, --branch-filter <branch filter mask>
>                           branch stack filter modes
>
> Cc: stable@...r.kernel.org
> Fixes: 955f6def5590 ("perf record: Add remaining branch filters: "no_cycles", "no_flags" & "hw_index"")
> Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
> ---
>  tools/perf/Documentation/perf-record.txt | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
> index e8b9aadbbfa5..3d19e77c9c53 100644
> --- a/tools/perf/Documentation/perf-record.txt
> +++ b/tools/perf/Documentation/perf-record.txt
> @@ -454,7 +454,7 @@ following filters are defined:
>  	- no_tx: only when the target is not in a hardware transaction
>  	- abort_tx: only when the target is a hardware transaction abort
>  	- cond: conditional branches
> -	- call_stack: save call stack
> +	- stack: save call stack
>  	- no_flags: don't save branch flags e.g prediction, misprediction etc
>  	- no_cycles: don't save branch cycles
>  	- hw_index: save branch hardware index
>
> base-commit: cb015814f8b6eebcbb8e46e111d108892c5e6821