tracing: change CPU ring buffer state from tracing_cpumask
authorVaibhav Nagarnaik <vnagarnaik@google.com>
Fri, 4 May 2012 01:59:52 +0000 (18:59 -0700)
committerSteven Rostedt <rostedt@goodmis.org>
Wed, 16 May 2012 23:50:38 +0000 (19:50 -0400)
commit71babb2705e2203a64c27ede13ae3508a0d2c16c
tree8274eb4b1b17872e38715e0f619669fcc2b06c8d
parent0a3d7ce7e6caa8c39cb5184bd9047a01a40abc2a
tracing: change CPU ring buffer state from tracing_cpumask

According to Documentation/trace/ftrace.txt:

tracing_cpumask:

        This is a mask that lets the user only trace
        on specified CPUS. The format is a hex string
        representing the CPUS.

The tracing_cpumask currently doesn't affect the tracing state of
per-CPU ring buffers.

This patch enables/disables CPU recording as its corresponding bit in
tracing_cpumask is set/unset.

Link: http://lkml.kernel.org/r/1336096792-25373-3-git-send-email-vnagarnaik@google.com
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Laurent Chavey <chavey@google.com>
Cc: Justin Teravest <teravest@google.com>
Cc: David Sharp <dhsharp@google.com>
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace.c