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

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

Recent patches

Most-recent 30 patches in this subsystem on linux-ext4 (capped at 30), ordered by date desc.

• COOLING6d 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>
• COOLING6d REVIEWED: 9 (9M) [PATCH v4 2/2] tracing: Remove trace_printk.h from kernel.h
  2026-06-25 · Steven Rostedt <rostedt@kernel.org>
• COOLING7d [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h
  2026-06-21 · Steven Rostedt <rostedt@kernel.org>
• COLD34d REVIEWED: 17 (17M) [RFC v8 6/7] ext4: fast commit: add lock_updates tracepoint
  2026-05-15 · Li Chen <hidden>
• COLD55d REVIEWED: 17 (17M) [RFC v7 6/7] ext4: fast commit: add lock_updates tracepoint
  2026-05-11 · Li Chen <hidden>
• HOTtoday [PATCH v4 15/23] ext4: add block mapping tracepoints for iomap buffered I/O path
  2026-05-11 · Zhang Yi <hidden>
• HOTtoday [PATCH v4 21/23] ext4: add tracepoints for ordered I/O in the iomap buffered I/O path
  2026-05-11 · Zhang Yi <hidden>
• STALE61d [PATCH v3 22/22] ext4: add tracepoints for ordered I/O in the iomap buffered I/O path
  2026-04-22 · Zhang Yi <hidden>
• STALE61d [PATCH v3 15/22] ext4: add block mapping tracepoints for iomap buffered I/O path
  2026-04-22 · Zhang Yi <hidden>
• STALE86d [RFC v6 6/7] ext4: fast commit: add lock_updates tracepoint
  2026-04-08 · Li Chen <hidden>
• STALE106d [RFC v5 6/7] ext4: fast commit: add lock_updates tracepoint
  2026-03-17 · Li Chen <hidden>
• STALE104d [PATCH 32/53] ext4: move dcache modifying code out of __ext4_link()
  2026-03-13 · NeilBrown <hidden>
• STALE104d [PATCH 34/53] tracefs: stop using d_add().
  2026-03-13 · NeilBrown <hidden>
• STALE83d [PATCH 15/61] trace: Prefer IS_ERR_OR_NULL over manual NULL check
  2026-03-10 · Philipp Hahn <hidden>
• STALE114d REVIEWED: 5 (5M) [PATCH v3 11/12] nilfs2: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE114d [PATCH v3 10/12] f2fs: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE114d REVIEWED: 9 (9M) [PATCH v3 09/12] ext4: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE114d [PATCH v3 07/12] hugetlbfs: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE114d [PATCH v3 05/12] cachefiles: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE114d [PATCH v3 04/12] vfs: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 015/110] nilfs2: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 009/110] f2fs: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 007/110] ext4: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 006/110] trace: reorder TP_STRUCT__entry fields for better packing on 32-bit
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 005/110] trace: store i_ino as u64 instead of ino_t/unsigned long
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE131d [PATCH 17/61] nilfs2: update for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE131d [PATCH 06/61] f2fs: update for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE131d [PATCH 04/61] ext4: update for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE131d [PATCH 03/61] trace: update VFS-layer trace events for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE132d [PATCH v1] mm: annotate data race of f_ra.prev_pos
  2026-02-26 · Jiayuan Chen <jiayuan.chen@linux.dev>

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.

• STALE114d 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
• STALE114d 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
• COLD55d REVIEWED: 17 (17M) [RFC v7 6/7] ext4: fast commit: add lock_updates tracepoint
  2026-05-11 · Li Chen <hidden> · 1 Reviewed-by
• COLD34d REVIEWED: 17 (17M) [RFC v8 6/7] ext4: fast commit: add lock_updates tracepoint
  2026-05-15 · Li Chen <hidden> · 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.

• STALE161d [RFC 1/5] ext4: mark inode format migration fast-commit ineligible
  2025-12-11 · Li Chen <hidden>
• STALE161d [RFC 2/5] ext4: mark fs-verity enable fast-commit ineligible
  2025-12-11 · Li Chen <hidden>
• STALE161d [RFC 3/5] ext4: mark move extents fast-commit ineligible
  2025-12-11 · Li Chen <hidden>
• STALE147d [PATCH -next v2 19/22] ext4: add block mapping tracepoints for iomap buffered I/O path
  2026-02-03 · Zhang Yi <yi.zhang@huawei.com>
• STALE131d [PATCH 04/61] ext4: update for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE131d [PATCH 06/61] f2fs: update for u64 i_ino
  2026-02-26 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 005/110] trace: store i_ino as u64 instead of ino_t/unsigned long
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 006/110] trace: reorder TP_STRUCT__entry fields for better packing on 32-bit
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE126d [PATCH v2 009/110] f2fs: use PRIino format for i_ino
  2026-03-02 · Jeff Layton <jlayton@kernel.org>
• STALE114d [PATCH v3 05/12] cachefiles: widen trace event i_ino fields to u64
  2026-03-04 · Jeff Layton <jlayton@kernel.org>