Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933809AbbDJQGU (ORCPT ); Fri, 10 Apr 2015 12:06:20 -0400 Received: from mga02.intel.com ([134.134.136.20]:24250 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933624AbbDJQGR (ORCPT ); Fri, 10 Apr 2015 12:06:17 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,557,1422950400"; d="scan'208";a="711905525" From: Tom Zanussi To: rostedt@goodmis.org Cc: masami.hiramatsu.pt@hitachi.com, namhyung@kernel.org, andi@firstfloor.org, alexei.starovoitov@gmail.com, linux-kernel@vger.kernel.org, Tom Zanussi Subject: [PATCH v4 4/7] tracing: Add a per-event-trigger 'paused' field Date: Fri, 10 Apr 2015 11:05:55 -0500 Message-Id: <2f06371117fb142c57b5a9544c19f0e7e8313c37.1428678702.git.tom.zanussi@linux.intel.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1763 Lines: 53 Add a simple per-trigger 'paused' flag, allowing individual triggers to pause. We could leave it to individual triggers that need this functionality to do it themselves, but we also want to allow other events to control pausing, so add it to the trigger data. Signed-off-by: Tom Zanussi --- kernel/trace/trace.h | 1 + kernel/trace/trace_events_trigger.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 3d38c2e..5bc1752 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1110,6 +1110,7 @@ struct event_trigger_data { struct event_filter __rcu *filter; char *filter_str; void *private_data; + bool paused; struct list_head list; }; diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index a8dfd4e..010ce30 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -73,6 +73,8 @@ event_triggers_call(struct ftrace_event_file *file, void *rec) return tt; list_for_each_entry_rcu(data, &file->triggers, list) { + if (data->paused) + continue; if (!rec) { data->ops->func(data, rec); continue; @@ -110,6 +112,8 @@ event_triggers_post_call(struct ftrace_event_file *file, struct event_trigger_data *data; list_for_each_entry_rcu(data, &file->triggers, list) { + if (data->paused) + continue; if (data->cmd_ops->trigger_type & tt) data->ops->func(data, rec); } -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/