linux-toradex.git/Documentation/trace, branch v3.14.57

Documentation/trace/postprocess/trace-vmscan-postprocess.pl: fix the traceevent regex

2014-01-24T00:36:52+00:00

When irq, preempt and lockdep fields are printed (field 3 in the example
below) in the trace output, the script fails.

An example entry:
  kswapd0-610   [000] ...1   158.112152: mm_vmscan_kswapd_wake: nid=0 order=0

Signed-off-by: Vinayak Menon 
Cc: Mel Gorman 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

tracing/uprobes: Add @+file_offset fetch method

2014-01-03T01:57:05+00:00

Enable to fetch data from a file offset.  Currently it only supports
fetching from same binary uprobe set.  It'll translate the file offset
to a proper virtual address in the process.

The syntax is "@+OFFSET" as it does similar to normal memory fetching
(@ADDR) which does no address translation.

Suggested-by: Oleg Nesterov 
Acked-by: Masami Hiramatsu 
Acked-by: Oleg Nesterov 
Cc: Srikar Dronamraju 
Cc: zhangwei(Jovi) 
Cc: Arnaldo Carvalho de Melo 
Signed-off-by: Namhyung Kim

tracing/uprobes: Add support for full argument access methods

2014-01-03T01:56:21+00:00

Enable to fetch other types of argument for the uprobes.  IOW, we can
access stack, memory, deref, bitfield and retval from uprobes now.

The format for the argument types are same as kprobes (but @SYMBOL
type is not supported for uprobes), i.e:

  @ADDR   : Fetch memory at ADDR
  $stackN : Fetch Nth entry of stack (N >= 0)
  $stack  : Fetch stack address
  $retval : Fetch return value
  +|-offs(FETCHARG) : Fetch memory at FETCHARG +|- offs address

Note that the retval only can be used with uretprobes.

Original-patch-by: Hyeoncheol Lee 
Acked-by: Masami Hiramatsu 
Acked-by: Oleg Nesterov 
Cc: Srikar Dronamraju 
Cc: Oleg Nesterov 
Cc: zhangwei(Jovi) 
Cc: Arnaldo Carvalho de Melo 
Signed-off-by: Hyeoncheol Lee 
Signed-off-by: Namhyung Kim

tracing/uprobes: Fix documentation of uprobe registration syntax

2014-01-02T21:17:23+00:00

The uprobe syntax requires an offset after a file path not a symbol.

Reviewed-by: Masami Hiramatsu 
Acked-by: Oleg Nesterov 
Acked-by: Srikar Dronamraju 
Cc: zhangwei(Jovi) 
Cc: Arnaldo Carvalho de Melo 
Signed-off-by: Namhyung Kim

tracing: Add documentation for trace event triggers

2013-12-22T03:02:18+00:00

Provide a basic overview of trace event triggers and document the
available trigger commands, along with a few simple examples.

Link: http://lkml.kernel.org/r/2595dd9196d7b553049611f2a3f849ca75d650a2.1382622043.git.tom.zanussi@linux.intel.com

Signed-off-by: Tom Zanussi 
Signed-off-by: Steven Rostedt

Documentation/trace/tracepoints.txt: add links to TRACE_EVENT documentation

2013-11-13T03:09:32+00:00

Existing tracepoint documentation doesn't mention the popular
TRACE_EVENT macro.  Since an excellent series of articles on proper
usage already exists, respective links are added to the existing
documentation.

Signed-off-by: Stefan Raspl 
Cc: Rob Landley 
Cc: Jiri Kosina 
Acked-by: Mathieu Desnoyers 
Cc: Zoltan Kiss 
Cc: Steven Rostedt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ftrace, sched: Add TRACE_FLAG_PREEMPT_RESCHED

2013-11-11T11:43:39+00:00

Since the introduction of PREEMPT_NEED_RESCHED in:

  f27dde8deef3 ("sched: Add NEED_RESCHED to the preempt_count")

we need to be able to look at both TIF_NEED_RESCHED and
PREEMPT_NEED_RESCHED to understand the full preemption behaviour.

Add it to the trace output.

Signed-off-by: Peter Zijlstra 
Acked-by: Steven Rostedt 
Cc: Fengguang Wu 
Cc: Huang Ying 
Cc: Yuanhan Liu 
Link: http://lkml.kernel.org/r/20131004152826.GP3081@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar

Documentation/trace: Correcting and extending tracepoint documentation

2013-08-27T08:57:11+00:00

The sample missed the moving of the header files into the events subdirectory.
I've also extended it based on the existing headers, and mentioned the tiny
but important role of CREATE_TRACE_POINTS.

Signed-off-by: Zoltan Kiss 
Acked-by: Mathieu Desnoyers 
Signed-off-by: Jiri Kosina

Documentation: replace strict_strtoul() with kstrtoul()

2013-08-20T10:56:26+00:00

The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.

Signed-off-by: Jingoo Han 
Signed-off-by: Jiri Kosina

Merge tag 'trace-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2013-07-11T16:02:09+00:00

Pull tracing changes from Steven Rostedt:
 "The majority of the changes here are cleanups for the large changes
  that were added to 3.10, which includes several bug fixes that have
  been marked for stable.

  As for new features, there were a few, but nothing to write to LWN
  about.  These include:

  New function trigger called "dump" and "cpudump" that will cause
  ftrace to dump its buffer to the console when the function is called.
  The difference between "dump" and "cpudump" is that "dump" will dump
  the entire contents of the ftrace buffer, where as "cpudump" will only
  dump the contents of the ftrace buffer for the CPU that called the
  function.

  Another small enhancement is a new sysctl switch called
  "traceoff_on_warning" which, when enabled, will disable tracing if any
  WARN_ON() is triggered.  This is useful if you want to debug what
  caused a warning and do not want to risk losing your trace data by the
  ring buffer overwriting the data before you can disable it.  There's
  also a kernel command line option that will make this enabled at boot
  up called the same thing"

* tag 'trace-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (34 commits)
  tracing: Make tracing_open_generic_{tr,tc}() static
  tracing: Remove ftrace() function
  tracing: Remove TRACE_EVENT_TYPE enum definition
  tracing: Make tracer_tracing_{off,on,is_on}() static
  tracing: Fix irqs-off tag display in syscall tracing
  uprobes: Fix return value in error handling path
  tracing: Fix race between deleting buffer and setting events
  tracing: Add trace_array_get/put() to event handling
  tracing: Get trace_array ref counts when accessing trace files
  tracing: Add trace_array_get/put() to handle instance refs better
  tracing: Protect ftrace_trace_arrays list in trace_events.c
  tracing: Make trace_marker use the correct per-instance buffer
  ftrace: Do not run selftest if command line parameter is set
  tracing/kprobes: Don't pass addr=ip to perf_trace_buf_submit()
  tracing: Use flag buffer_disabled for irqsoff tracer
  tracing/kprobes: Turn trace_probe->files into list_head
  tracing: Fix disabling of soft disable
  tracing: Add missing syscall_metadata comment
  tracing: Simplify code for showing of soft disabled flag
  tracing/kprobes: Kill probe_enable_lock
  ...