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 v16 00/13] tracing: wprobe: x86: Add wprobe for watchpoint
  2026-09-14 12:52 · 8 replies in 7d · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v3 0/4] tracing: Fix NULL dereference when copying keys for a field variable
  2026-09-14 05:35 · 4 replies in 7d · Donggeun Yoo <hidden>
• HOTtoday [PATCH v2 0/2] tracing: Fix buffer_meta open paths
  2026-09-14 13:35 · 2 replies in 7d · David Carlier <hidden>
• HOTtoday [RFC PATCH v7 00/10] trace: stack trace deduplication for ftrace ring buffer
  2026-09-12 08:40 · 8 replies in 7d · Li Pengfei <hidden>
• HOTtoday [PATCH v4 00/16] Remove PG_private by using page/folio->private checks instead
  2026-09-14 02:24 · 2 replies in 7d · Zi Yan <ziy@nvidia.com>
• HOTtoday [PATCH v2 0/2] tracing: Fix NULL dereference when copying keys for a field variable
  2026-09-13 20:31 · 2 replies in 7d · Donggeun Yoo <hidden>
• DORMANTno replies [PATCH] tracing: Clamp the printed end of a histogram bucket at U64_MAX
  2026-09-14 13:23 · 0 replies in 7d · Donggeun Yoo <hidden>
• HOTtoday [PATCH] tracing: Unregister field variable histograms when the command fails
  2026-09-14 10:40 · 0 replies in 7d · Donggeun Yoo <hidden>
• HOTtoday [PATCH v3] mm: vmscan: rework lru_shrink and write_folio tracepoints
  2026-09-14 07:24 · 0 replies in 7d · qiwu.chen (陈启武) <hidden>
• HOTtoday [PATCH] tracing: Don't log an error for the speculative field variable lookup
  2026-09-13 20:32 · 0 replies in 7d · Donggeun Yoo <hidden>

Active reviewers (last 30 days)

• Sashiko <sashiko-bot@kernel.org>
  17 attestations (17 Reported-by) · last on 2026-09-14
• Gabriele Monaco <gmonaco@redhat.com>
  14 attestations (1 Co-developed-by, 9 Reviewed-by, 4 Suggested-by) · last on 2026-09-06
• Shivank Garg <hidden>
  6 attestations (6 Tested-by) · last on 2026-09-10
• Fuad Tabba <hidden>
  6 attestations (6 Reviewed-by) · last on 2026-09-10
• Xiaoyao Li <hidden>
  6 attestations (6 Reviewed-by) · last on 2026-09-10
• Binbin Wu <hidden>
  6 attestations (6 Reviewed-by) · last on 2026-09-10
• Jinchao Wang <hidden>
  4 attestations (4 Reviewed-by) · last on 2026-09-14
• Johan Hovold <johan@kernel.org>
  4 attestations (2 Reviewed-by, 2 Tested-by) · last on 2026-09-04
• Steven Rostedt <rostedt@goodmis.org>
  3 attestations (1 Reported-by, 2 Reviewed-by) · last on 2026-09-13
• kernel test robot <hidden>
  3 attestations (3 Reported-by) · last on 2026-09-11

Recent patches

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

• DORMANTno replies [PATCH v2 2/2] ring-buffer: Do not show buffer_meta for CPUs without a buffer
  2026-09-14 · David Carlier <hidden>
• HOTtoday [PATCH v2 1/2] tracing: Take trace_types_lock when dropping the buffer_meta reference
  2026-09-14 · David Carlier <hidden>
• DORMANTno replies [PATCH] tracing: Clamp the printed end of a histogram bucket at U64_MAX
  2026-09-14 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v16 13/13] tracing/wprobe: Support BTF struct offset resolution in set_wprobe trigger
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v16 12/13] tracing/wprobe: Support BTF typecast in fetchargs
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v16 11/13] selftests: tracing: Add wprobe trigger testcase
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v16 10/13] tracing/wprobe: Add set_wprobe and clear_wprobe event triggers
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v16 09/13] selftests: tracing: Add syntax testcase for wprobe
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v16 08/13] selftests: tracing: Add a basic testcase for wprobe
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday REVIEWED: 1 (0M) [PATCH v16 07/13] x86: hw_breakpoint: Add a kconfig to clarify when a breakpoint fires
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH v16 06/13] tracing/wprobe: Add wprobe (watchpoint probe) trace event support
  2026-09-14 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• HOTtoday [PATCH] tracing: Unregister field variable histograms when the command fails
  2026-09-14 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v3] mm: vmscan: rework lru_shrink and write_folio tracepoints
  2026-09-14 · qiwu.chen (陈启武) <hidden>
• HOTtoday [PATCH v3 4/4] tracing: Fix NULL dereference when copying keys for a field variable
  2026-09-14 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v3 3/4] tracing: Only report the stacktrace modifier on a real field
  2026-09-14 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v3 2/4] tracing: Add the bucket size to expr_field_str()
  2026-09-14 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v3 1/4] tracing: Print the bucket size as unsigned
  2026-09-14 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v4 16/16] mm/page-flags: remove PG_private
  2026-09-14 · Zi Yan <ziy@nvidia.com>
• HOTtoday [PATCH v4 10/16] mm/page-flags: check page/folio->private instead of PG_private
  2026-09-14 · Zi Yan <ziy@nvidia.com>
• HOTtoday [PATCH] tracing: Don't log an error for the speculative field variable lookup
  2026-09-13 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v2 2/2] tracing: Fix NULL dereference when copying keys for a field variable
  2026-09-13 · Donggeun Yoo <hidden>
• HOTtoday [PATCH v2 1/2] tracing: Add the bucket size to expr_field_str()
  2026-09-13 · Donggeun Yoo <hidden>
• HOTtoday [PATCH] tracing: Take trace_types_lock when dropping the buffer_meta reference
  2026-09-13 · David Carlier <hidden>
• WARM1d [PATCH v3] blktrace: fix the field offsets of the synthesized v1 record
  2026-09-13 · Donggeun Yoo <hidden>
• WARM1d [PATCH v2] blktrace: fix the field offsets of the synthesized v1 record
  2026-09-13 · Donggeun Yoo <hidden>
• WARM1d [PATCH] blktrace: build the synthesized v1 record from the entry's own layout
  2026-09-13 · Donggeun Yoo <hidden>
• HOTtoday [PATCH] ring-buffer: Check resize_disabled before publishing the new subbuf order
  2026-09-12 · David Carlier <hidden>
• HOTtoday [PATCH] tracing: Fix NULL dereference when copying keys for a field variable
  2026-09-12 · Donggeun Yoo <hidden>
• HOTtoday [RFC PATCH v7 10/10] selftests/ftrace: add a stackmap instance gating test
  2026-09-12 · Li Pengfei <hidden>
• HOTtoday [RFC PATCH v7 09/10] selftests/ftrace: add a stackmap reset and binary ABI test
  2026-09-12 · Li Pengfei <hidden>

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.

• STALE181d REVIEWED: 9 (9M) [PATCH v3 09/12] ext4: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org> · 1 Reviewed-by
• STALE181d REVIEWED: 5 (5M) [PATCH v3 11/12] nilfs2: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org> · 1 Reviewed-by
• STALE182d REVIEWED: 10 (10M) Re: [PATCH v2] tracing: Generate undef symbols allowlist for simple_ring_buffer
  2026-03-13 · Nathan Chancellor <nathan@kernel.org> · 1 Reviewed-by, 1 Tested-by
• STALE181d REVIEWED: 10 (10M) [PATCH v3] tracing: Generate undef symbols allowlist for simple_ring_buffer
  2026-03-16 · Vincent Donnefort <hidden> · 1 Reviewed-by, 1 Tested-by
• STALE168d REVIEWED: 1 (0M) [PATCH AUTOSEL 6.19-5.10] btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()
  2026-03-30 · Sasha Levin <sashal@kernel.org> · 1 Reviewed-by
• STALE165d REVIEWED: 9 (9M) [PATCH v3 2/3] tracing: Update futex syscall trace event to show more commands
  2026-03-31 · Steven Rostedt <rostedt@kernel.org> · 1 Reviewed-by
• STALE158d REVIEWED: 1 (1M) [PATCH net-next v2 1/2] mptcp: better mptcp-level RTT estimator
  2026-04-07 · "Matthieu Baerts (NGI0)" <matttbe@kernel.org> · 1 Reviewed-by
• DORMANTno replies REVIEWED: 2 (0M) [PATCH v3] tracing/osnoise: Add option to align tlat threads
  2026-04-16 · Tomas Glozar <tglozar@redhat.com> · 2 Reviewed-by
• STALE150d 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
• STALE146d REVIEWED: 17 (17M) [PATCH AUTOSEL 6.18] tracing/probe: reject non-closed empty immediate strings
  2026-04-20 · Sasha Levin <sashal@kernel.org> · 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.

• STALE199d [PATCH v17 3/3] mm: Improve RSS counter approximation accuracy for proc interfaces
  2026-02-17 · Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
• STALE203d [PATCH v2 1/4] ring-buffer: Fix to check event length before using
  2026-02-18 · "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
• DORMANTno replies [PATCH] fgraph: Do not call handlers direct when not using ftrace_ops
  2026-02-18 · Steven Rostedt <rostedt@goodmis.org>
• STALE192d [PATCH v12 30/30] tracing: selftests: Add hypervisor trace remote tests
  2026-02-19 · Vincent Donnefort <hidden>
• STALE206d [PATCH v3 3/5] tracing: Remove unnecessary check for EVENT_FILE_FL_FREED
  2026-02-19 · Petr Pavlu <petr.pavlu@suse.com>
• STALE206d [PATCH v3 4/5] tracing: Clean up access to trace_event_file from a file pointer
  2026-02-19 · Petr Pavlu <petr.pavlu@suse.com>
• DORMANTno replies [PATCH v3 5/5] tracing: Free up file->private_data for use by individual events
  2026-02-19 · Petr Pavlu <petr.pavlu@suse.com>
• STALE144d [PATCH bpf-next 01/17] ftrace: Add ftrace_hash_count function
  2026-02-20 · Jiri Olsa <jolsa@kernel.org>
• STALE144d [PATCH bpf-next 09/17] bpf: Add support for tracing_multi link cookies
  2026-02-20 · Jiri Olsa <jolsa@kernel.org>
• STALE84d [RFC PATCH v4 02/27] mm,cpuset: gate allocations from N_MEMORY_PRIVATE behind __GFP_PRIVATE
  2026-02-22 · Gregory Price <gourry@gourry.net>