From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B12DCC31E44 for ; Tue, 11 Jun 2019 21:52:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8704620874 for ; Tue, 11 Jun 2019 21:52:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407750AbfFKVwk (ORCPT ); Tue, 11 Jun 2019 17:52:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:39590 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407165AbfFKVwk (ORCPT ); Tue, 11 Jun 2019 17:52:40 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A3A1720866; Tue, 11 Jun 2019 21:52:39 +0000 (UTC) Date: Tue, 11 Jun 2019 17:52:37 -0400 From: Steven Rostedt To: Thomas Preisner Cc: Ingo Molnar , linux-kernel@vger.kernel.org Subject: Re: [PATCH] ftrace: add simple oneshot function tracer Message-ID: <20190611175237.0ea4fa4f@gandalf.local.home> In-Reply-To: <20190611203312.13653-1-linux@tpreisner.de> References: <20190529104552.146fa97c@oasis.local.home> <20190611203312.13653-1-linux@tpreisner.de> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 11 Jun 2019 22:33:11 +0200 Thomas Preisner wrote: > However, due to there not being any mechanism (that I am aware of) to > activate such stat tracers via kernel commandline this oneshot profiler > is now always active when selected. Therefore, it is no longer possible > to disable this tracer during runtime and thus, allocated memory is no > longer freed. What do you mean? The function profile has its own file to enable it: echo 1 > /sys/kernel/tracing/function_profile_enabled And disable it: echo 0 > /sys/kernel/tracing/function_profile_enabled -- Steve