• Steven Rostedt's avatar
    tracing: show that buffer size is not expanded · db526ca3
    Steven Rostedt authored
    Impact: do not confuse user on small trace buffer sizes
    When the system boots up, the trace buffer is small to conserve memory.
    It is only two pages per online CPU. When the tracer is used, it expands
    to the default value.
    This can confuse the user if they look at the buffer size and see only
    7, but then later they see 1408.
     # cat /debug/tracing/buffer_size_kb
     # echo sched_switch > /debug/tracing/current_tracer
     # cat /debug/tracing/buffer_size_kb
    This patch tries to help remove this confustion by showing that the
    buffer has not been expanded.
     # cat /debug/tracing/buffer_size_kb
    7 (expanded: 1408)
    Signed-off-by: default avatarSteven Rostedt <srostedt@redhat.com>