tracing: Add ref count to tracer for when they are being read by pipe

Browse source

When one of the trace pipe files are being read (by either the trace_pipe
or trace_pipe_raw), do not allow the current_trace to change. By adding
a ref count that is incremented when the pipe files are opened, will
prevent the current_trace from being changed.

This will allow for the removal of the global trace_types_lock from
reading the pipe buffers (which is currently a bottle neck).

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

...

This commit is contained in:

Steven Rostedt (Red Hat) 2014-12-15 20:13:31 -05:00 • committed by Steven Rostedt

parent 97bf6af1f9

commit cf6ab6d914

2 changed files with 16 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

16

kernel/trace/trace.c

View file

1

kernel/trace/trace.h

View file