Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp1037600imu; Fri, 16 Nov 2018 14:41:25 -0800 (PST) X-Google-Smtp-Source: AJdET5ctXg+RiOTmS4jXkO9IYW5V3OutO1J2obvd8ch2lQX4oK9XYS0o0XXWTlaXxS1XZUahV5ev X-Received: by 2002:a17:902:1347:: with SMTP id r7-v6mr12668743ple.238.1542408085692; Fri, 16 Nov 2018 14:41:25 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1542408085; cv=none; d=google.com; s=arc-20160816; b=qxEi4Bvf/yjymrRMYjJ4d07491TCap+baWrqDBl5c0AG7lp/j7AMSLeGo3aUZjr+aM QuqWo9KXSEMQQLN9p+bnnFW/SmiCJBMgHDBM3TQRWhdCMf1IWIraLCUWUYO7YI5GXA1J DGyDS0pr/C42KPPLx6sS97ZNq4zaV5rzx/I2fUp/GADvZIkKrL+S5l0UlgzGffmLDzcv F7CTin5BrrqZET3LQ+tZ98+1R24bNalVH43uGqgXFRJ0D/0s7Qn0SMpFdnFqvppXiAoy CI3f8CcYFoi+jyZi5lXCGMdvAiOCeg3psUfwLxW5X96Ltrny0EwWkiMhGTx4/graNzq2 zpLg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:to:subject:message-id:date:from :mime-version:dkim-signature; bh=B0Q2On6JV9eOrS2wdu+wAEi9TSL7YPjpQjjt2VykxJI=; b=iFlmedvpo9RYIFANgPV7HAcpG3Xx1zE35Qy1c4Je75arFeSI5yxxtI+HBF92P8BnMB bprEOnuMNR+s1uZINYX7ES3JAfZ/pIRz8KkeFtIhC3JtH+1MXh6CzFwYHtR9m/fV5rzG nP6f2p5fToflQf0s8QRcRikxBlvHcf3ZkOjn/TWqeCGk3fsa8aJGf1adLu/dRIvTcYI8 ebDe/3u5/+g/WwBZlAHUMoXDFsAhmHiqkfwnxsl+oQkUAcYRfLZ677/bzAOgXCsfqcX+ TYXyQkXuuHYDTUsPZYWn9htSx2S8QbxI6Wnzh33xprpdEjz34QoH4n2aixfP82md6wtg 7mnw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=V0Lt9kkX; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 22si30253369pgl.107.2018.11.16.14.41.10; Fri, 16 Nov 2018 14:41:25 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=V0Lt9kkX; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729550AbeKQIwq (ORCPT + 99 others); Sat, 17 Nov 2018 03:52:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:50366 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725819AbeKQIwq (ORCPT ); Sat, 17 Nov 2018 03:52:46 -0500 Received: from mail-oi1-f171.google.com (mail-oi1-f171.google.com [209.85.167.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 154562086B for ; Fri, 16 Nov 2018 22:38:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542407912; bh=noP3MWRg5zGi1G4xuhxMXMPCIyE0ynShV3lO353HebA=; h=From:Date:Subject:To:From; b=V0Lt9kkXKAys0Hlr74eCSjx/pR2xryov2sMWq8hxbl1t6lGwdDi/6G6f+IaAoDbSo Cj2AYsIImKP0peEDHeQZLAPaMNGxuGbutUp8ZAz4Em8l5X5HazOixqdO1ASfLeYhup egnY7IQquabxRkctMmK4G4KowbmB/8RG1HNARmbM= Received: by mail-oi1-f171.google.com with SMTP id r127-v6so20947392oie.3 for ; Fri, 16 Nov 2018 14:38:32 -0800 (PST) X-Gm-Message-State: AGRZ1gL5e6C3jDsXk1ocfNICrFef5gXWpaAc0aZ1/guXRp1ot3m2Chsz LODuMProiwUB/MCEpjdZVctD6pFmlfnhEzntjUg= X-Received: by 2002:aca:6155:: with SMTP id v82-v6mr1920463oib.270.1542407911428; Fri, 16 Nov 2018 14:38:31 -0800 (PST) MIME-Version: 1.0 From: Timur Tabi Date: Fri, 16 Nov 2018 16:37:55 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Enable tracing only for one function and its children? To: lkml Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Is there a way to enable ftrace tracing only for one specific function and all the functions it calls? Then when the function returns, disable tracing until the next time? When I pass the function name only to set_ftrace_filter, it literally only traces that function, which doesn't help me. I tried setting writing "nvidia_ioctl:traceon" to set_ftrace_filter, but that just gave me an "invalid argument" error. And even if that did work, I don't know what function to use for :traceoff.