• Linus Torvalds's avatar
    Merge tag 'trace-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · 32663c78
    Linus Torvalds authored
    Pull tracing updates from Steven Rostedt:
    
     - The biggest news in that the tracing ring buffer can now time events
       that interrupted other ring buffer events.
    
       Before this change, if an interrupt came in while recording another
       event, and that interrupt also had an event, those events would all
       have the same time stamp as the event it interrupted.
    
       Now, with the new design, those events will have a unique time stamp
       and rightfully display the time for those events that were recorded
       while interrupting another event.
    
     - Bootconfig how has an "override" operator that lets the users have a
       default config, but then add options to override the default.
    
     - A fix was made to properly filter function graph tracing to the
       ftrace PIDs. This came in at the end of the -rc cycle, and needs to
       be backported.
    
     - Several clean ups, performance updates, and minor fixes as well.
    
    * tag 'trace-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (39 commits)
      tracing: Add trace_array_init_printk() to initialize instance trace_printk() buffers
      kprobes: Fix compiler warning for !CONFIG_KPROBES_ON_FTRACE
      tracing: Use trace_sched_process_free() instead of exit() for pid tracing
      bootconfig: Fix to find the initargs correctly
      Documentation: bootconfig: Add bootconfig override operator
      tools/bootconfig: Add testcases for value override operator
      lib/bootconfig: Add override operator support
      kprobes: Remove show_registers() function prototype
      tracing/uprobe: Remove dead code in trace_uprobe_register()
      kprobes: Fix NULL pointer dereference at kprobe_ftrace_handler
      ftrace: Fix ftrace_trace_task return value
      tracepoint: Use __used attribute definitions from compiler_attributes.h
      tracepoint: Mark __tracepoint_string's __used
      trace : Have tracing buffer info use kvzalloc instead of kzalloc
      tracing: Remove outdated comment in stack handling
      ftrace: Do not let direct or IPMODIFY ftrace_ops be added to module and set trampolines
      ftrace: Setup correct FTRACE_FL_REGS flags for module
      tracing/hwlat: Honor the tracing_cpumask
      tracing/hwlat: Drop the duplicate assignment in start_kthread()
      tracing: Save one trace_event->type by using __TRACE_LAST_TYPE
      ...
    32663c78
ring_buffer.c 151 KB