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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 D42A3C4167B for ; Thu, 10 Dec 2020 19:23:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9781D2067C for ; Thu, 10 Dec 2020 19:23:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390342AbgLJOam (ORCPT ); Thu, 10 Dec 2020 09:30:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:36936 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390174AbgLJO2s (ORCPT ); Thu, 10 Dec 2020 09:28:48 -0500 From: Greg Kroah-Hartman Authentication-Results: mail.kernel.org; dkim=permerror (bad message/signature format) To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Steven Rostedt (VMware)" Subject: [PATCH 4.4 34/39] tracing: Fix userstacktrace option for instances Date: Thu, 10 Dec 2020 15:26:45 +0100 Message-Id: <20201210142602.565193935@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201210142600.887734129@linuxfoundation.org> References: <20201210142600.887734129@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steven Rostedt (VMware) commit bcee5278958802b40ee8b26679155a6d9231783e upstream. When the instances were able to use their own options, the userstacktrace option was left hardcoded for the top level. This made the instance userstacktrace option bascially into a nop, and will confuse users that set it, but nothing happens (I was confused when it happened to me!) Cc: stable@vger.kernel.org Fixes: 16270145ce6b ("tracing: Add trace options for core options to instances") Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace.c | 9 +++++---- kernel/trace/trace.h | 6 ++++-- 2 files changed, 9 insertions(+), 6 deletions(-) --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1706,7 +1706,7 @@ void trace_buffer_unlock_commit(struct t __buffer_unlock_commit(buffer, event); ftrace_trace_stack(tr, buffer, flags, 6, pc, NULL); - ftrace_trace_userstack(buffer, flags, pc); + ftrace_trace_userstack(tr, buffer, flags, pc); } EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit); @@ -1768,7 +1768,7 @@ void trace_buffer_unlock_commit_regs(str * two. They are that meaningful. */ ftrace_trace_stack(tr, buffer, flags, regs ? 0 : 4, pc, regs); - ftrace_trace_userstack(buffer, flags, pc); + ftrace_trace_userstack(tr, buffer, flags, pc); } EXPORT_SYMBOL_GPL(trace_buffer_unlock_commit_regs); @@ -1941,14 +1941,15 @@ void trace_dump_stack(int skip) static DEFINE_PER_CPU(int, user_stack_count); void -ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, int pc) +ftrace_trace_userstack(struct trace_array *tr, + struct ring_buffer *buffer, unsigned long flags, int pc) { struct trace_event_call *call = &event_user_stack; struct ring_buffer_event *event; struct userstack_entry *entry; struct stack_trace trace; - if (!(global_trace.trace_flags & TRACE_ITER_USERSTACKTRACE)) + if (!(tr->trace_flags & TRACE_ITER_USERSTACKTRACE)) return; /* --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -656,13 +656,15 @@ void update_max_tr_single(struct trace_a #endif /* CONFIG_TRACER_MAX_TRACE */ #ifdef CONFIG_STACKTRACE -void ftrace_trace_userstack(struct ring_buffer *buffer, unsigned long flags, +void ftrace_trace_userstack(struct trace_array *tr, + struct ring_buffer *buffer, unsigned long flags, int pc); void __trace_stack(struct trace_array *tr, unsigned long flags, int skip, int pc); #else -static inline void ftrace_trace_userstack(struct ring_buffer *buffer, +static inline void ftrace_trace_userstack(struct trace_array *tr, + struct ring_buffer *buffer, unsigned long flags, int pc) { }