From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6200A21D58B; Mon, 24 Nov 2025 20:27:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764016068; cv=none; b=LiOzP0bM3qNfLrV8qGu8oeXtzpF4Tl9Ml8OpSbqWZWO+FUEwovrsaWYHZpaEiRkoOPCVzVLbu/RrEoJiZ7vi2Ic2bQD5Aezaj5Sx4K5IfvVsTqJSzx6QG7XMeyWeDEYGDSTpOP4GNWxBierTMwawmSREeEu25O/uEhOtCxDJsvs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764016068; c=relaxed/simple; bh=sFh+GJxftviI9ok4scpNd13sZc66q9ausSV1iblN4c8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=s5lUaxehavBKIjVJfALoNytPim4ua0Fv73wbijEaT80OWpR9VVNA3K6Qh7a8X6kf8dTDs1qgoszYu/020N5qpOWfmHt/maMOqeNr8YuIXAtWXQpegb438E59iLALoJK1W4gzf9RWTKSXDHVWLymK6akeORfKxFITmAu2AwW4iNc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KTFiIFxI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KTFiIFxI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D5CEC4CEF1; Mon, 24 Nov 2025 20:27:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764016067; bh=sFh+GJxftviI9ok4scpNd13sZc66q9ausSV1iblN4c8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=KTFiIFxIHYF2h4iZEW4r2LkXe7JgcmqkYhBvEph60j/ynB8wATFGJnkwV/ugWvEJ/ mGe5GlToodlHPO0vVouG7Tu7SR8rmQ4qFtx6CIVOY2kb2F4efxIAKOm7Sb/gBMaglW gBMUS69QgjvLMO4jv/nRk22+Rxd3XtI2RFzm6rCoH4PYIU08Y1Zp/WdvQRtoV4vKr8 39j/0aLog4GxdFCyPuGl6C3D01Fr4nQTLL4fVPh8mOU9b1UGe0mmSjiWXwcJfTSuhW z4sf87j4Ufcz3ArMv+cXQC3LgnstY0rk4Lf/0likaWX/BV9KgYc4bIAeEXD7ImhXLA H1D3YqWo4rUTw== Date: Mon, 24 Nov 2025 12:27:45 -0800 From: Namhyung Kim To: Thomas Richter Cc: Arnaldo Carvalho de Melo , Ian Rogers , James Clark , Jiri Olsa , Adrian Hunter , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org, Steven Rostedt , Josh Poimboeuf , Indu Bhagat , Jens Remus , Mathieu Desnoyers , linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org Subject: Re: [PATCH v6 3/6] perf record: Add --call-graph fp,defer option for deferred callchains Message-ID: References: <20251120234804.156340-1-namhyung@kernel.org> <20251120234804.156340-4-namhyung@kernel.org> <947ef366-435d-4b05-b0b1-685e569d0a1e@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <947ef366-435d-4b05-b0b1-685e569d0a1e@linux.ibm.com> Hello, On Fri, Nov 21, 2025 at 07:26:34AM +0100, Thomas Richter wrote: > 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 .... No, it's not supported. Maybe we can do similar just to dump stack content and registers for dwarf before returning to user. Thanks, Namhyung