linux/kernel/events
Linus Torvalds 6cdfa54cd2 The biggest change for this release is in the histogram code.
- Add "onchange(var)" histogram handler that executes a action when $var
    changes.
 
  - Add new "snapshot()" action for histogram handlers, that causes a
    snapshot of the ring buffer when triggered.
    ie. onchange(var).snapshot() will trigger a snapshot if var changes.
 
  - Add alternative for "trace()" action.
    Currently, to trigger a synthetic event, the name of that event is used
    as the handler name, which is inconsistent with the other actions.
    onchange(var).synthetic(param) where it can now be
    onchange(var).trace(synthetic, param). The older method will still be
    allowed, as long as the synthetic events do not overlap with other
    handler names.
 
  - The histogram documentation at testcases were updated for the new
    changes.
 
 Added a quicker way to enable set_ftrace_filter files, that will make
 it much quicker to bisect tracing a function that shouldn't be traced and
 crashes the kernel. (You can echo in numbers to set_ftrace_filter, and it
 will select the corresponding function that is in
 available_filter_functions).
 
 Some better displaying of the tracing data (and more information was added).
 
 The rest are small fixes and more clean ups to the code.
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Merge tag 'trace-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

Pull tracing updates from Steven Rostedt:
 "The biggest change for this release is in the histogram code:

   - Add "onchange(var)" histogram handler that executes a action when
     $var changes.

   - Add new "snapshot()" action for histogram handlers, that causes a
     snapshot of the ring buffer when triggered. ie.
     onchange(var).snapshot() will trigger a snapshot if var changes.

   - Add alternative for "trace()" action. Currently, to trigger a
     synthetic event, the name of that event is used as the handler
     name, which is inconsistent with the other actions.
     onchange(var).synthetic(param) where it can now be
     onchange(var).trace(synthetic, param). The older method will still
     be allowed, as long as the synthetic events do not overlap with
     other handler names.

   - The histogram documentation at testcases were updated for the new
     changes.

  Outside of the histogram code, we have:

   - Added a quicker way to enable set_ftrace_filter files, that will
     make it much quicker to bisect tracing a function that shouldn't be
     traced and crashes the kernel. (You can echo in numbers to
     set_ftrace_filter, and it will select the corresponding function
     that is in available_filter_functions).

   - Some better displaying of the tracing data (and more information
     was added).

  The rest are small fixes and more clean ups to the code"

* tag 'trace-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (37 commits)
  tracing: Use strncpy instead of memcpy when copying comm in trace.c
  tracing: Use strncpy instead of memcpy when copying comm for hist triggers
  tracing: Use strncpy instead of memcpy for string keys in hist triggers
  tracing: Use str_has_prefix() in synth_event_create()
  x86/ftrace: Fix warning and considate ftrace_jmp_replace() and ftrace_call_replace()
  tracing/perf: Use strndup_user() instead of buggy open-coded version
  doc: trace: Fix documentation for uprobe_profile
  tracing: Fix spelling mistake: "analagous" -> "analogous"
  tracing: Comment why cond_snapshot is checked outside of max_lock protection
  tracing: Add hist trigger action 'expected fail' test case
  tracing: Add alternative synthetic event trace action test case
  tracing: Add hist trigger onchange() handler test case
  tracing: Add hist trigger snapshot() action test case
  tracing: Add SPDX license GPL-2.0 license identifier to inter-event testcases
  tracing: Add alternative synthetic event trace action syntax
  tracing: Add hist trigger onchange() handler Documentation
  tracing: Add hist trigger onchange() handler
  tracing: Add hist trigger snapshot() action Documentation
  tracing: Add hist trigger snapshot() action
  tracing: Add conditional snapshot
  ...
2019-03-11 17:01:32 -07:00
..
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
callchain.c perf/core: Convert to SPDX license identifiers 2019-02-04 08:46:11 +01:00
core.c Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 15:22:03 -07:00
hw_breakpoint.c perf/hw_breakpoints: Convert to SPDX license identifier 2019-02-04 08:46:13 +01:00
internal.h perf/ring_buffer: Convert ring_buffer.aux_refcount to refcount_t 2019-02-04 08:46:17 +01:00
ring_buffer.c perf/ring_buffer: Use high order allocations for AUX buffers optimistically 2019-03-09 14:10:30 +01:00
uprobes.c The biggest change for this release is in the histogram code. 2019-03-11 17:01:32 -07:00