tracing: add annotation to what type of stack trace is recorded
authorSteven Rostedt <srostedt@redhat.com>
Wed, 3 Jun 2009 15:10:44 +0000 (11:10 -0400)
committerSteven Rostedt <rostedt@goodmis.org>
Wed, 3 Jun 2009 15:10:44 +0000 (11:10 -0400)
commit563af16c30ede41eda2d614195d88e07f7c7103d
treea56b4f3339b8850b8f1fd9064bb99d50cd99aa79
parent56d8bd3f0b98972312cad683947ec90b21011199
tracing: add annotation to what type of stack trace is recorded

The current method of printing out a stack trace is to add a new line
and print out the trace:

    yum-updatesd-3120  [002]   573.691303:
 => do_softirq
 => irq_exit
 => smp_apic_timer_interrupt
 => apic_timer_interrupt

This looks a bit awkward, and if we have both stack and user stack traces
running, it would be nice to have a title to tell them apart, although
it is easy to tell by the output.

This patch adds an annotation to the start of the stack traces:

            init-1     [003]   929.304979: <stack trace>
 => user_path_at
 => vfs_fstatat
 => vfs_stat
 => sys_newstat
 => system_call_fastpath

             cat-3459  [002]  1016.824040: <user stack trace>
 =>  <0000003aae6c0250>
 =>  <00007ffff4b06ae4>
 =>  <69636172742f6775>

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
kernel/trace/trace_output.c