[ 163/187] tracing: change CPU ring buffer state from tracing_cpumask

Greg Kroah-Hartman
2012-07-12T22:52:17Z

From: Vaibhav Nagarnaik <vnagarnaik@google.com>

commit 71babb2705e2203a64c27ede13ae3508a0d2c16c upstream.

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