function hooks (ftrace) · Maintained

Maintainers

• M Steven Rostedt <rostedt@goodmis.org>
• M Masami Hiramatsu <mhiramat@kernel.org>
• R Mark Rutland <mark.rutland@arm.com>

Paths

• F Documentation/trace/ftrace*
• F arch/*/*/*/*ftrace*
• F arch/*/*/*ftrace*
• F include/*/*ftrace*
• F kernel/trace/fgraph.c
• F kernel/trace/ftrace*
• F samples/ftrace

Last 30 days

Recent patches

Most-recent 30 patches in this subsystem on linux-trace-kernel (capped at 30), ordered by date desc.

• FAILED: Patch "fgraph: Do not call handlers direct when not using ftrace_ops" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>
• FAILED: Patch "function_graph: Restore direct mode when callbacks drop to one" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>
• [PATCH] fgraph: Do not call handlers direct when not using ftrace_ops
  2026-02-18 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH RESEND] function_graph: restore direct mode when callbacks drop to one
  2026-02-13 · <hidden>
• [PATCH] function_graph: restore direct mode when callbacks drop to one
  2026-02-13 · <hidden>
• Re: [PATCH bpf-next 2/4] x86/fgraph,bpf: Switch kprobe_multi program stack unwind to hw_regs path
  2026-01-13 · Jiri Olsa <hidden>
• [PATCH bpf-next 2/4] x86/fgraph,bpf: Switch kprobe_multi program stack unwind to hw_regs path
  2026-01-12 · Jiri Olsa <jolsa@kernel.org>
• [PATCH] fgraph: Make sure fregs is non-null when accessing
  2026-01-07 · <hidden>
• [PATCH v2 2/3] fgraph: Check ftrace_pids_enabled on registration for early filtering
  2025-11-26 · <wang.yaxin@zte.com.cn>
• [PATCH v2 1/3] fgraph: Initialize ftrace_ops->private for function graph ops
  2025-11-26 · <wang.yaxin@zte.com.cn>
• [PATCH v2 1/3] fgraph: Initialize ftrace_ops->private for function graph ops
  2025-11-26 · <wang.yaxin@zte.com.cn>
• [PATCH v2 01/13] tracing: Fix typo in fgraph.c
  2025-11-21 · Maurice Hieronymus <hidden>
• [PATCH v2 01/13] tracing: Fix typo in fpgraph.c
  2025-11-21 · Maurice Hieronymus <hidden>
• [PATCH 3/4] tracing: Have function graph tracer option sleep-time be per instance
  2025-11-14 · Steven Rostedt <rostedt@kernel.org>
• [PATCH linux-next] fgraph: Fix and tighten PID filtering support
  2025-11-13 · <wang.yaxin@zte.com.cn>
• [PATCH 13/21] trace: don't use GENMASK()
  2025-10-25 · "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
• [PATCH 13/21] trace: don't use GENMASK()
  2025-10-25 · "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
• [PATCH] trace/fgraph: Fix error handling
  2025-09-06 · Guenter Roeck <linux@roeck-us.net>
• [PATCH -next] trace/fgraph: Fix the warning caused by missing unregister notifier
  2025-08-18 · Ye Weihua <hidden>
• [PATCH v2] fgraph: Keep track of when fgraph_ops are registered or not
  2025-07-01 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH] fgraph: Keep track of when fgraph_ops are registered or not
  2025-06-18 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH v2] ftrace: Show subops in enabled_functions
  2025-04-10 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH] ftrace: Show subops in enabled_functions
  2025-04-09 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH v1] fgraph: Correct typo in ftrace_return_to_handler comment
  2025-02-18 · Haiyue Wang <hidden>
• [PATCH v2] fgraph: Remove calltime and rettime from generic operations
  2025-01-22 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH] fgraph: Remove calltime and rettime from generic operations
  2025-01-14 · Steven Rostedt <rostedt@goodmis.org>
• Re: [PATCH] fgraph: Move trace_clock_local() for return time to function_graph tracer
  2025-01-14 · Steven Rostedt <rostedt@goodmis.org>
• [PATCH] fgraph: Move trace_clock_local() for return time to function_graph tracer
  2025-01-12 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• [PATCH] kernel/trace: Add READ_ONCE() when accessing fgraph_array[]
  2024-12-31 · Zilin Guan <hidden>
• [PATCH v22 04/20] fgraph: Pass ftrace_regs to retfunc
  2024-12-26 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• [PATCH 3/4] tracing: Have function graph tracer option sleep-time be per instance
  2025-11-14 · Steven Rostedt <rostedt@kernel.org>
• [PATCH v2 01/13] tracing: Fix typo in fpgraph.c
  2025-11-21 · Maurice Hieronymus <hidden>
• [PATCH v2 01/13] tracing: Fix typo in fgraph.c
  2025-11-21 · Maurice Hieronymus <hidden>
• [PATCH v2 1/3] fgraph: Initialize ftrace_ops->private for function graph ops
  2025-11-26 · <wang.yaxin@zte.com.cn>
• [PATCH v2 1/3] fgraph: Initialize ftrace_ops->private for function graph ops
  2025-11-26 · <wang.yaxin@zte.com.cn>
• [PATCH v2 2/3] fgraph: Check ftrace_pids_enabled on registration for early filtering
  2025-11-26 · <wang.yaxin@zte.com.cn>
• [PATCH RESEND] function_graph: restore direct mode when callbacks drop to one
  2026-02-13 · <hidden>
• [PATCH] fgraph: Do not call handlers direct when not using ftrace_ops
  2026-02-18 · Steven Rostedt <rostedt@goodmis.org>
• FAILED: Patch "function_graph: Restore direct mode when callbacks drop to one" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>
• FAILED: Patch "fgraph: Do not call handlers direct when not using ftrace_ops" failed to apply to 6.12-stable tree
  2026-03-01 · Sasha Levin <sashal@kernel.org>