tree ab9db9dec53a0c0383476c8dfca17d75c83317f6
parent b3aa557722b3d5858f14ca559e03461c24125aaf
author Steven Rostedt <rostedt@goodmis.org> 1225461515 -0400
committer Ingo Molnar <mingo@elte.hu> 1225707004 +0100

tracing, ring-buffer: add paranoid checks for loops

While writing a new tracer, I had a bug where I caused the ring-buffer
to recurse in a bad way. The bug was with the tracer I was writing
and not the ring-buffer itself. But it took a long time to find the
problem.

This patch adds paranoid checks into the ring-buffer infrastructure
that will catch bugs of this nature.

Note: I put the bug back in the tracer and this patch showed the error
      nicely and prevented the lockup.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>