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  1. 20 Dec, 2008 2 commits
    • Markus Metzger's avatar
      x86, bts: memory accounting · c5dee617
      Markus Metzger authored 
      Impact: move the BTS buffer accounting to the mlock bucket

Add alloc_locked_buffer() and free_locked_buffer() functions to mm/mlock.c
to kalloc a buffer and account the locked memory to current.

Account the memory for the BTS buffer to the tracer.
Signed-off-by: default avatarMarkus Metzger <markus.t.metzger@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c5dee617
    • Markus Metzger's avatar
      x86, bts: add fork and exit handling · bf53de90
      Markus Metzger authored 
      Impact: introduce new ptrace facility

Add arch_ptrace_untrace() function that is called when the tracer
detaches (either voluntarily or when the tracing task dies);
ptrace_disable() is only called on a voluntary detach.

Add ptrace_fork() and arch_ptrace_fork(). They are called when a
traced task is forked.

Clear DS and BTS related fields on fork.

Release DS resources and reclaim memory in ptrace_untrace(). This
releases resources already when the tracing task dies. We used to do
that when the traced task dies.
Signed-off-by: default avatarMarkus Metzger <markus.t.metzger@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      bf53de90
  3. 19 Dec, 2008 3 commits
    • Ingo Molnar's avatar
      Merge branches 'tracing/ftrace', 'tracing/ring-buffer' and 'tracing/urgent' into tracing/core · 30cd324e
      Ingo Molnar authored 
      Conflicts:
	include/linux/ftrace.h
      30cd324e
    • Ingo Molnar's avatar
      tracing: fix warnings in kernel/trace/trace_sched_switch.c · c71dd42d
      Ingo Molnar authored 
      these warnings:

  kernel/trace/trace_sched_switch.c: In function ‘tracing_sched_register’:
  kernel/trace/trace_sched_switch.c:96: warning: passing argument 1 of ‘register_trace_sched_wakeup_new’ from incompatible pointer type
  kernel/trace/trace_sched_switch.c:112: warning: passing argument 1 of ‘unregister_trace_sched_wakeup_new’ from incompatible pointer type
  kernel/trace/trace_sched_switch.c: In function ‘tracing_sched_unregister’:
  kernel/trace/trace_sched_switch.c:121: warning: passing argument 1 of ‘unregister_trace_sched_wakeup_new’ from incompatible pointer type

Trigger because sched_wakeup_new tracepoints need the same trace
signature as sched_wakeup - which was changed recently.

Fix it.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      c71dd42d
    • Ingo Molnar's avatar
      tracing: fix warning in kernel/trace/trace.c · 3bddb9a3
      Ingo Molnar authored 
      this warning:

  kernel/trace/trace.c: In function ‘print_lat_fmt’:
  kernel/trace/trace.c:1826: warning: unused variable ‘state’

Triggers because 'state' has become unused - remove it.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      3bddb9a3
  5. 18 Dec, 2008 6 commits
  7. 17 Dec, 2008 27 commits
  9. 16 Dec, 2008 2 commits
    • Cyrill Gorcunov's avatar
      x86: entry_64 - introduce FTRACE_ frame macro v2 · d680fe44
      Cyrill Gorcunov authored 
      Impact: clean up

Itroduce MCOUNT_SAVE/RESTORE_FRAME which allow us to
save a number of lines on source level.

Also fix a comment in ftrace.h.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      d680fe44
    • Frederic Weisbecker's avatar
      tracing/ftrace: add the printk-msg-only option · 66896a85
      Frederic Weisbecker authored 
      Impact: display ftrace_printk messages "as is"

By default, ftrace_printk() messages find their output with some other
informations like pid, caller, ...
Sometimes a developer just want to have the ftrace_printk left "as is", without
other information.

This is done by providing a default-off option called printk-msg-only.
To enable it, just do `echo printk-msg-only > /debugfs/tracing/trace_options`

Before the patch:

           <...>-2739  [000]   145.692153: __might_sleep: I'm an ftrace_printk msg in __might_sleep
           <...>-2739  [000]   145.692155: __might_sleep: I'm another ftrace_printk msg in __might_sleep

After the patch and the printk-msg-only option enabled:

I'm an ftrace_printk msg in __might_sleep
I'm another ftrace_printk msg in __might_sleep
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      66896a85
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