tree 510e516dd5fa388cb9582a2f6b055f3725fbf2c1
parent 62f0b3eb5cb58931a02ee4e599e19c80a171e351
author Steven Rostedt <srostedt@redhat.com> 1252088680 -0400
committer Steven Rostedt <rostedt@goodmis.org> 1252107742 -0400

ring-buffer: only enable ring_buffer_swap_cpu when needed

Since the ability to swap the cpu buffers adds a small overhead to
the recording of a trace, we only want to add it when needed.

Only the irqsoff and preemptoff tracers use this feature, and both are
not recommended for production kernels. This patch disables its use
when neither irqsoff nor preemptoff is configured.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>