• Linus Torvalds's avatar
    Merge tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 2a56bb59
    Linus Torvalds authored
    Pull tracing updates from Steven Rostedt:
     "New features:
    
       - Tom Zanussi's extended histogram work.
    
         This adds the synthetic events to have histograms from multiple
         event data Adds triggers "onmatch" and "onmax" to call the
         synthetic events Several updates to the histogram code from this
    
       - Allow way to nest ring buffer calls in the same context
    
       - Allow absolute time stamps in ring buffer
    
       - Rewrite of filter code parsing based on Al Viro's suggestions
    
       - Setting of trace_clock to global if TSC is unstable (on boot)
    
       - Better OOM handling when allocating large ring buffers
    
       - Added initcall tracepoints (consolidated initcall_debug code with
         them)
    
      And other various fixes and clean ups"
    
    * tag 'trace-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (68 commits)
      init: Have initcall_debug still work without CONFIG_TRACEPOINTS
      init, tracing: Have printk come through the trace events for initcall_debug
      init, tracing: instrument security and console initcall trace events
      init, tracing: Add initcall trace events
      tracing: Add rcu dereference annotation for test func that touches filter->prog
      tracing: Add rcu dereference annotation for filter->prog
      tracing: Fixup logic inversion on setting trace_global_clock defaults
      tracing: Hide global trace clock from lockdep
      ring-buffer: Add set/clear_current_oom_origin() during allocations
      ring-buffer: Check if memory is available before allocation
      lockdep: Add print_irqtrace_events() to __warn
      vsprintf: Do not preprocess non-dereferenced pointers for bprintf (%px and %pK)
      tracing: Uninitialized variable in create_tracing_map_fields()
      tracing: Make sure variable string fields are NULL-terminated
      tracing: Add action comparisons when testing matching hist triggers
      tracing: Don't add flag strings when displaying variable references
      tracing: Fix display of hist trigger expressions containing timestamps
      ftrace: Drop a VLA in module_exists()
      tracing: Mention trace_clock=global when warning about unstable clocks
      tracing: Default to using trace_global_clock if sched_clock is unstable
      ...
    2a56bb59
ftrace.rst 121 KB