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 00/11] Kernel API Specification Framework
  2026-10-08 08:51 · 1 reply in 7d · Sasha Levin <sashal@kernel.org>
• COOLING5d [PATCH v19 00/11] tracing: wprobe: x86: Add wprobe for watchpoint
  2026-10-03 07:54 · 8 replies in 7d · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING4d [PATCH v13 00/25] Introduce SCMI Telemetry support
  2026-10-04 08:02 · 1 reply in 7d · Cristian Marussi <cristian.marussi@arm.com>
• COOLING6d [PATCH v3 0/2] tracing: Override trace_instance parameter
  2026-10-02 14:02 · 2 replies in 7d · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• WARM3d [PATCH bpf-next v4 00/12] bpf: make the vmlinux BTF an on-demand loadable module (CONFIG_DEBUG_INFO_BTF=m) to save ~5.4 MB memory
  2026-10-01 22:54 · 3 replies in 7d · Jay Wang <hidden>
• COOLING6d [PATCH v2 0/2] tracing: Override trace_instance parameter
  2026-10-02 05:44 · 2 replies in 7d · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• WARM3d [PATCH v4 00/11] seq_buf: Add seq_buf_strlen()
  2026-10-03 03:59 · 1 reply in 7d · Kees Cook <kees@kernel.org>

Active reviewers (last 30 days)

• Jinchao Wang <hidden>
  4 attestations (4 Reviewed-by) · last on 2026-10-03
• Nam Cao <hidden>
  3 attestations (3 Reviewed-by) · last on 2026-09-29
• Johan Hovold <johan@kernel.org>
  2 attestations (1 Reviewed-by, 1 Tested-by) · last on 2026-09-14
• Shivank Garg <hidden>
  2 attestations (2 Tested-by) · last on 2026-09-10
• Fuad Tabba <hidden>
  2 attestations (2 Reviewed-by) · last on 2026-09-10
• Xiaoyao Li <hidden>
  2 attestations (2 Reviewed-by) · last on 2026-09-10
• Binbin Wu <hidden>
  2 attestations (2 Reviewed-by) · last on 2026-09-10
• Juri Lelli <juri.lelli@redhat.com>
  1 attestation (1 Reviewed-by) · last on 2026-09-29
• David Hildenbrand (Arm) <david@kernel.org>
  1 attestation (1 Acked-by) · last on 2026-09-21
• Aaron Tomlin <atomlin@atomlin.com>
  1 attestation (1 Reviewed-by) · last on 2026-09-14

Recent patches

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

• HOTtoday [PATCH v5 11/11] kernel/api: add syscall enter/exit tracepoints
  2026-10-08 · Sasha Levin <sashal@kernel.org>
• COOLING4d [PATCH v13 05/25] include: trace: Add Telemetry trace events
  2026-10-04 · Cristian Marussi <cristian.marussi@arm.com>
• COOLING5d [PATCH v19 11/11] tracing/wprobe: Support BTF struct offset resolution in set_wprobe trigger
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d [PATCH v19 10/11] tracing/wprobe: Support BTF typecast in fetchargs
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d [PATCH v19 09/11] selftests: tracing: Add wprobe trigger testcases
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d [PATCH v19 08/11] tracing/wprobe: Add set_wprobe and clear_wprobe event triggers
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d [PATCH v19 07/11] selftests: tracing: Add syntax testcase for wprobe
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d [PATCH v19 06/11] selftests: tracing: Add a basic testcase for wprobe
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d REVIEWED: 1 (0M) [PATCH v19 05/11] x86: hw_breakpoint: Add a kconfig to clarify when a breakpoint fires
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING5d [PATCH v19 04/11] tracing/wprobe: Add wprobe (watchpoint probe) trace event support
  2026-10-03 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• WARM3d [PATCH v4 06/11] seq_buf: Add seq_buf_terminate()
  2026-10-03 · Kees Cook <kees@kernel.org>
• DORMANTno replies [PATCH v3 2/2] selftests/ftrace: Add test case for overriding trace_instance parameter
  2026-10-02 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING6d [PATCH v3 1/2] tracing: Override the same name trace_instance= by latter one
  2026-10-02 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING6d [PATCH v2 2/2] selftests/ftrace: Add test case for overriding trace_instance parameter
  2026-10-02 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING6d [PATCH v2 1/2] tracing: Override the same name trace_instance= by latter one
  2026-10-02 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• WARM3d [PATCH bpf-next v4 09/12] bpf, trace, net: prepare CONFIG_DEBUG_INFO_BTF checks for a tristate
  2026-10-01 · Jay Wang <hidden>
• WARM3d [PATCH bpf-next v4 05/12] bpf, tracing: load the vmlinux BTF where tracefs and bpffs requests start
  2026-10-01 · Jay Wang <hidden>
• WARM3d [PATCH bpf-next v4 03/12] bpf: fetch the vmlinux BTF where kernel types enter a program
  2026-10-01 · Jay Wang <hidden>
• COOLING9d REVIEWED: 2 (1M) [PATCH 08/10] rv: Add dl_server specific monitors
  2026-09-29 · Gabriele Monaco <gmonaco@redhat.com>
• COOLING9d REVIEWED: 1 (0M) [PATCH 07/10] rv: Add throttle deadline monitor
  2026-09-29 · Gabriele Monaco <gmonaco@redhat.com>
• COOLING9d REVIEWED: 1 (0M) [PATCH 06/10] rv: Add enqueue/dequeue to snroc monitor
  2026-09-29 · Gabriele Monaco <gmonaco@redhat.com>
• DORMANTno replies [PATCH v18 11/11] tracing/wprobe: Support BTF struct offset resolution in set_wprobe trigger
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d [PATCH v18 10/11] tracing/wprobe: Support BTF typecast in fetchargs
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d [PATCH v18 09/11] selftests: tracing: Add wprobe trigger testcases
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d [PATCH v18 08/11] tracing/wprobe: Add set_wprobe and clear_wprobe event triggers
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d [PATCH v18 07/11] selftests: tracing: Add syntax testcase for wprobe
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d [PATCH v18 06/11] selftests: tracing: Add a basic testcase for wprobe
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d REVIEWED: 1 (0M) [PATCH v18 05/11] x86: hw_breakpoint: Add a kconfig to clarify when a breakpoint fires
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING13d [PATCH v18 04/11] tracing/wprobe: Add wprobe (watchpoint probe) trace event support
  2026-09-25 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• COOLING10d [PATCH v17 13/13] tracing/wprobe: Support BTF struct offset resolution in set_wprobe trigger
  2026-09-22 · "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.

• STALE174d REVIEWED: 9 (9M) [PATCH v2 03/28] filelock: add a tracepoint to start of break_lease()
  2026-04-16 · Jeff Layton <jlayton@kernel.org> · 1 Reviewed-by
• STALE143d REVIEWED: 9 (9M) [PATCH v3 02/28] filelock: add support for ignoring deleg breaks for dir change events
  2026-04-28 · Jeff Layton <jlayton@kernel.org> · 1 Reviewed-by
• STALE143d REVIEWED: 9 (9M) [PATCH v3 03/28] filelock: add a tracepoint to start of break_lease()
  2026-04-28 · Jeff Layton <jlayton@kernel.org> · 1 Reviewed-by
• STALE143d REVIEWED: 9 (9M) [PATCH v3 05/28] fsnotify: new tracepoint in fsnotify()
  2026-04-28 · Jeff Layton <jlayton@kernel.org> · 1 Reviewed-by
• STALE105d REVIEWED: 1 (0M) [PATCH v7 02/42] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2026-05-23 · Ackerley Tng <hidden> · 1 Reviewed-by
• STALE74d REVIEWED: 1 (0M) [PATCH v8 02/46] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2026-06-19 · Ackerley Tng via B4 Relay <devnull+ackerleytng.google.com@kernel.org> · 1 Reviewed-by
• COLD59d REVIEWED: 4 (0M) [PATCH v9 02/41] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2026-07-29 · Ackerley Tng <hidden> · 3 Reviewed-by, 1 Tested-by
• COLD59d REVIEWED: 2 (0M) [PATCH v9 04/41] KVM: Rename memory attribute APIs to prepare for in-place gmem conversion
  2026-07-29 · Ackerley Tng <hidden> · 1 Reviewed-by, 1 Tested-by
• COLD42d REVIEWED: 4 (0M) [PATCH v10 03/41] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2026-08-07 · Ackerley Tng <hidden> · 3 Reviewed-by, 1 Tested-by
• COLD42d REVIEWED: 3 (0M) [PATCH v10 05/41] KVM: Rename memory attribute APIs to prepare for in-place gmem conversion
  2026-08-07 · Ackerley Tng <hidden> · 2 Reviewed-by, 1 Tested-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.

• STALE205d [PATCH RFC v3 02/43] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2026-03-13 · Ackerley Tng <hidden>
• STALE206d [PATCH net-next v2 10/14] tcp: expose rmem and backlog in tcp and mptcp rcvbuf_grow tracepoints
  2026-03-14 · <hidden>
• STALE202d LANDED [PATCH v3 2/8] dma-mapping: handle DMA_ATTR_CPU_CACHE_CLEAN in trace output
  2026-03-16 · Leon Romanovsky <leon@kernel.org>
• STALE202d LANDED [PATCH v3 3/8] dma-mapping: Clarify valid conditions for CPU cache line overlap
  2026-03-16 · Leon Romanovsky <leon@kernel.org>
• STALE189d [PATCH v2 06/11] HID: spi_hid: add spi_hid traces
  2026-03-24 · Jingyuan Liang <hidden>
• COLD56d [PATCH RFC v4 02/44] KVM: Rename KVM_GENERIC_MEMORY_ATTRIBUTES to KVM_VM_MEMORY_ATTRIBUTES
  2026-03-26 · Ackerley Tng <hidden>
• STALE115d [PATCH v3 07/24] include: trace: Add Telemetry trace events
  2026-03-29 · Cristian Marussi <cristian.marussi@arm.com>
• STALE164d [RFC, PATCH 07/12] sched/numa: skip scanning anonymous VM_UFFD_MINOR VMAs
  2026-04-14 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>
• STALE174d [PATCH v2 02/28] filelock: add support for ignoring deleg breaks for dir change events
  2026-04-16 · Jeff Layton <jlayton@kernel.org>
• STALE157d [PATCH 04/14] mm: add VM_UFFD_RWP VMA flag
  2026-04-27 · "Kiryl Shutsemau (Meta)" <kas@kernel.org>