linux-kernel - [PATCH v2 0/5] tracing: Make event triggers affect correct instance

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Message-Id: <1460759535-22403-1-git-send-email-hcochran@kernelspring.com>
Date:	Fri, 15 Apr 2016 18:32:10 -0400
From:	Howard Cochran <hcochran@...nelspring.com>
To:	linux-kernel@...r.kernel.org
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...hat.com>,
	Howard Cochran <cochran@...mark.com>
Subject: [PATCH v2 0/5] tracing: Make event triggers affect correct instance

This is version 2 of the patches to make tracing event triggers affect
the correct instance rather than always the top-level instance. The sum
of these patches is identical to version 1, but this version fixes an
error in patch #1 that the kbuild test robot found.

Original Description:
Although all of the trace event triggers can be used in instances, most
of them affect the top-level instance even when triggered from within an
instance. This patch set makes them affect the instance in which the
trigger occurred. The enable_event & disable_event triggers already work
within the correct instance, so these are unchanged.

The same problem also exists with the function probe triggers, but they
will be fixed in a later patch set.

Patch 1 is preparatory.
Patch 2 fixes the stacktrace event trigger
Patch 3 fixes the traceon & traceoff event triggers
Patch 4 fixes the snapshot event trigger
Patch 5 Makes related warning messages also go to the correct instance

 kernel/trace/trace.c                | 96 +++++++++++++++++++++++++------------
 kernel/trace/trace.h                | 14 +++++-
 kernel/trace/trace_events_trigger.c | 62 ++++++++++++++----------
 3 files changed, 113 insertions(+), 59 deletions(-)