linux-kernel - [GIT PULL] probes: Updates for v6.19

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Message-Id: <20251203093546.2c0907c32d6aa8ef42249605@kernel.org>
Date: Wed, 3 Dec 2025 09:35:46 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Masami Hiramatsu (Google) <mhiramat@...nel.org>, Menglong Dong
 <menglong8.dong@...il.com>, Thorsten Blum <thorsten.blum@...ux.dev>, Steven
 Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>,
 linux-kernel@...r.kernel.org
Subject: [GIT PULL] probes: Updates for v6.19

Hi Linus,

Probes for v6.19

- fprobe: Performance enhancement of the fprobe using rhltable
  . fprobe: use rhltable for fprobe_ip_table. The fprobe IP table has
    been converted to use an rhltable for improved performance when
    dealing with a large number of probed functions.
  . Fix a suspicious RCU usage warning of the above change in the
    fprobe entry handler.
  . Remove an unused local variable of the above change.
  . Fix to initialize fprobe_ip_table in core_initcall().

- fprobe: Performance optimization of fprobe by ftrace
  . fprobe: Use ftrace instead of fgraph for entry only probes. This
    avoids the unneeded overhead of fgraph stack setup.
  . Also update fprobe selftest for entry-only probe.
  . fprobe: Use ftrace only if CONFIG_DYNAMIC_FTRACE_WITH_ARGS or
    WITH_REGS is defined.

- probes: Cleanup probe event subsystems.
  . uprobe/eprobe: Allocate traceprobe_parse_context per probe instead
    of each probe argument parsing. This reduce memory allocation/free
    of temporary working memory.
  . uprobes: Cleanup code using __free().
  . eprobes: Cleanup code using __free().
  . probes: Cleanup code using __free(trace_probe_log_clear) to clear
    error log automatically.
  . probes: Replace strcpy() with memcpy() in __trace_probe_log_err().


Please pull the latest probes-v6.19 tree, which can be found at:


  git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git
probes-v6.19

Tag SHA1: f5c785618b77385ed4fa930a17db87df26497f65
Head SHA1: cd06078a38aaedfebbf8fa0c009da0f99f4473fb


Masami Hiramatsu (Google) (6):
      tracing: probes: Use __free() for trace_probe_log
      tracing: eprobe: Cleanup eprobe event using __free()
      tracing: uprobes: Cleanup __trace_uprobe_create() with __free()
      tracing: uprobe: eprobes: Allocate traceprobe_parse_context per probe
      tracing: fprobe: Remove unused local variable
      tracing: fprobe: Fix to init fprobe_ip_table earlier

Menglong Dong (5):
      tracing: fprobe: use rhltable for fprobe_ip_table
      tracing: fprobe: fix suspicious rcu usage in fprobe_entry
      tracing: fprobe: optimization for entry only case
      lib/test_fprobe: add testcase for mixed fprobe
      tracing: fprobe: use ftrace if CONFIG_DYNAMIC_FTRACE_WITH_ARGS

Thorsten Blum (1):
      tracing: probes: Replace strcpy() with memcpy() in __trace_probe_log_err()

----
 include/linux/fprobe.h      |   3 +-
 kernel/trace/fprobe.c       | 301 ++++++++++++++++++++++++++++++++------------
 kernel/trace/trace_eprobe.c | 108 +++++++---------
 kernel/trace/trace_probe.c  |   5 +-
 kernel/trace/trace_probe.h  |   4 +-
 kernel/trace/trace_uprobe.c |  82 +++++-------
 lib/tests/test_fprobe.c     |  99 ++++++++++++++-
 7 files changed, 405 insertions(+), 197 deletions(-)

-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>