linux-kernel - Re: [PATCH v6 3/6] perf record: Add --call-graph fp,defer option for deferred callchains

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Message-ID: <947ef366-435d-4b05-b0b1-685e569d0a1e@linux.ibm.com>
Date: Fri, 21 Nov 2025 07:26:34 +0100
From: Thomas Richter <tmricht@...ux.ibm.com>
To: Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ian Rogers <irogers@...gle.com>, James Clark <james.clark@...aro.org>
Cc: Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
        Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org,
        Steven Rostedt <rostedt@...dmis.org>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        Indu Bhagat <indu.bhagat@...cle.com>,
        Jens Remus <jremus@...ux.ibm.com>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        linux-trace-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v6 3/6] perf record: Add --call-graph fp,defer option for
 deferred callchains

On 11/21/25 00:48, Namhyung Kim wrote:
> Add a new callchain record mode option for deferred callchains.  For now
> it only works with FP (frame-pointer) mode.
> 
> And add the missing feature detection logic to clear the flag on old
> kernels.
> 
>   $ perf record --call-graph fp,defer -vv true

Does this also works for dwarf format?
    # perf record --call-graph dwarf,defer ....
-- 
Thomas Richter, Dept 3303, IBM s390 Linux Development, Boeblingen, Germany
--
IBM Deutschland Research & Development GmbH

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