tracing · Maintained

Maintainers

• M Steven Rostedt <rostedt@goodmis.org>
• M Masami Hiramatsu <mhiramat@kernel.org>
• R Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

Paths

• F Documentation/core-api/tracepoint.rst
• F Documentation/trace/*
• F fs/tracefs/
• F include/linux/trace*.h
• F include/trace/
• F kernel/trace/
• F kernel/tracepoint.c
• F scripts/tracing/
• F scripts/tracepoint-update.c
• F tools/testing/selftests/ftrace/

Last 30 days

Most active threads (last 7 days)

• HOTtoday [PATCH v5 00/23] Introduce SCMI Telemetry support
  2026-07-03 12:36 · 1 reply in 7d · Cristian Marussi <cristian.marussi@arm.com>
• WARM2d Re: [for-next][PATCH 04/15] tracepoint: Add lockdep rcu_is_watching() check to trace_##name##_enabled()
  2026-07-01 17:12 · 1 reply in 7d · Geert Uytterhoeven <geert@linux-m68k.org>
• WARM2d [PATCH v8 00/13] Add support for SCMIv4.0 Powercap Extensions
  2026-07-01 12:58 · 1 reply in 7d · Philip Radford <hidden>
• WARM2d [PATCH v7 00/22] dma-mapping: Track shared DMA state through direct, pool and swiotlb paths
  2026-07-01 05:51 · 1 reply in 7d · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>

Active reviewers (last 30 days)

• Yury Norov <yury.norov@gmail.com>
  2 attestations (2 Suggested-by) · last on 2026-06-25
• Masami Hiramatsu (Google) <mhiramat@kernel.org>
  2 attestations (2 Acked-by) · last on 2026-06-25
• Nicolas Dufresne <nicolas.dufresne@collabora.com>
  1 attestation (1 Reviewed-by) · last on 2026-06-10

Recent patches

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

• HOTtoday [PATCH v5 06/23] include: trace: Add Telemetry trace events
  2026-07-03 · Cristian Marussi <cristian.marussi@arm.com>
• DORMANTno replies Re: [for-next][PATCH 04/15] tracepoint: Add lockdep rcu_is_watching() check to trace_##name##_enabled()
  2026-07-01 · Steven Rostedt <rostedt@kernel.org>
• WARM2d [PATCH v8 08/13] include: trace: Add new parameter to trace_scmi_fc_call
  2026-07-01 · Philip Radford <hidden>
• WARM2d [PATCH v7 09/22] dma-mapping: Add internal shared allocation attribute
  2026-07-01 · "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
• WARM1d REVIEWED: 9 (9M) [PATCH v4 1/2] tracing: Move non-trace_printk prototypes into trace_controls.h
  2026-06-25 · Steven Rostedt <rostedt@kernel.org>
• WARM1d REVIEWED: 9 (9M) [PATCH v4 2/2] tracing: Remove trace_printk.h from kernel.h
  2026-06-25 · Steven Rostedt <rostedt@kernel.org>
• WARM2d [PATCH 1/7] i2c: add I2C_XFER_V2 - support for detailed transfer reporting
  2026-06-23 · Dmitry Guzman <hidden>
• WARM2d [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h
  2026-06-21 · Steven Rostedt <rostedt@kernel.org>
• COLD16d [PATCH v7 08/13] include: trace: Add new parameter to trace_scmi_fc_call
  2026-06-17 · Philip Radford <hidden>
• HOTtoday [PATCH v4 07/31] include: trace: Add Telemetry trace events
  2026-06-12 · Cristian Marussi <cristian.marussi@arm.com>
• COLD18d [PATCH v1 3/4] tracing/remotes: Add REMOTE_EVENT_CUSTOM_PRINTK() helper
  2026-06-12 · Vincent Donnefort <hidden>
• COLD23d [PATCH v2 8/9] media: Add HW run/done trace events
  2026-06-10 · Detlev Casanova <detlev.casanova@collabora.com>
• COLD23d [PATCH v2 7/9] media: Add stream on/off traces and run them in the ioctl
  2026-06-10 · Detlev Casanova <detlev.casanova@collabora.com>
• COLD23d REVIEWED: 1 (1M) [PATCH v2 4/9] media: Add tgid and fd to the v4l2-requests trace fields
  2026-06-10 · Detlev Casanova <detlev.casanova@collabora.com>
• COLD44d [PATCH v6 07/12] include: trace: Add new parameter to trace_scmi_fc_call
  2026-05-18 · Philip Radford <hidden>
• DORMANTno replies REVIEWED: 1 (0M) [PATCH v3] tracing: Fix nr_subbufs initialization in simple_ring_buffer_init_mm()
  2026-05-12 · David Carlier <hidden>
• COLD52d Re: [PATCH v19 0/7] ring-buffer: Making persistent ring buffers robust
  2026-05-02 · Steven Rostedt <rostedt@kernel.org>
• COLD52d [PATCH v19 7/7] ring-buffer: Cleanup buffer_data_page related code
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COLD52d [PATCH v19 6/7] ring-buffer: Cleanup persistent ring buffer validation
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COLD52d [PATCH v19 5/7] ring-buffer: Show commit numbers in buffer_meta file
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COLD52d [PATCH v19 4/7] ring-buffer: Add persistent ring buffer invalid-page inject test
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COLD52d [PATCH v19 3/7] ring-buffer: Skip invalid sub-buffers when rewinding persistent ring buffer
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COLD52d [PATCH v19 2/7] ring-buffer: Skip invalid sub-buffers when validating persistent ring buffer
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COLD52d REVIEWED: 5 (5M) [PATCH v19 1/7] ring-buffer: Flush and stop persistent ring buffer on panic
  2026-04-30 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• STALE65d Re: [PATCH v18 3/8] ring-buffer: Skip invalid sub-buffers when validating persistent ring buffer
  2026-04-29 · Masami Hiramatsu (Google) <mhiramat@kernel.org>
• COLD58d [PATCH v5 07/12] include: trace: Add new parameter to trace_scmi_fc_call
  2026-04-28 · Philip Radford <hidden>
• STALE65d [PATCH v18 8/8] ring-buffer: Cleanup buffer_data_page related code
  2026-04-24 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• STALE65d [PATCH v18 7/8] ring-buffer: Cleanup persistent ring buffer validation
  2026-04-24 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• STALE65d [PATCH v18 6/8] ring-buffer: Show commit numbers in buffer_meta file
  2026-04-24 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• STALE65d [PATCH v18 5/8] ring-buffer: Add persistent ring buffer invalid-page inject test
  2026-04-24 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• DORMANTno replies REVIEWED: 1 (0M) [PATCH v3] tracing: Fix nr_subbufs initialization in simple_ring_buffer_init_mm()
  2026-05-12 · David Carlier <hidden> · 1 Reviewed-by
• COLD23d REVIEWED: 1 (1M) [PATCH v2 4/9] media: Add tgid and fd to the v4l2-requests trace fields
  2026-06-10 · Detlev Casanova <detlev.casanova@collabora.com> · 1 Reviewed-by

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.

• STALE186d [PATCHv5 bpf-next 2/9] ftrace: Make alloc_and_copy_ftrace_hash direct friendly
  2025-12-15 · Jiri Olsa <jolsa@kernel.org>
• STALE198d [PATCH bpf-next 1/2] bpf: move recursion detection logic to helpers
  2025-12-17 · Puranjay Mohan <puranjay@kernel.org>
• STALE123d LANDED [PATCHv6 bpf-next 2/9] ftrace: Make alloc_and_copy_ftrace_hash direct friendly
  2025-12-30 · Jiri Olsa <jolsa@kernel.org>
• STALE123d LANDED [PATCHv6 bpf-next 3/9] ftrace: Export some of hash related functions
  2025-12-30 · Jiri Olsa <jolsa@kernel.org>
• STALE123d LANDED [PATCHv6 bpf-next 4/9] ftrace: Add update_ftrace_direct_add function
  2025-12-30 · Jiri Olsa <jolsa@kernel.org>
• STALE123d LANDED [PATCHv6 bpf-next 5/9] ftrace: Add update_ftrace_direct_del function
  2025-12-30 · Jiri Olsa <jolsa@kernel.org>
• STALE123d LANDED [PATCHv6 bpf-next 6/9] ftrace: Add update_ftrace_direct_mod function
  2025-12-30 · Jiri Olsa <jolsa@kernel.org>
• STALE176d Re: [PATCH bpf-next 1/2] arm64/ftrace,bpf: Fix partial regs after bpf_prog_run
  2026-01-08 · Jiri Olsa <hidden>
• STALE99d [PATCH v2 06/17] include: trace: Add Telemetry trace events
  2026-01-14 · Cristian Marussi <cristian.marussi@arm.com>
• STALE153d [PATCH v10 30/30] tracing: selftests: Add hypervisor trace remote tests
  2026-01-26 · Vincent Donnefort <hidden>