Masami Hiramatsu (Google) d7dbdd2ee0 tracing: Fix to avoid creating trace instances with duplicate names ...

Since commit e645535a95 ("tracing: Add option to use memmapped
memory for trace boot instance") changed trace_array_get_by_name() to
trace_array_create_systems(), enable_instances() does not reuse the
same name instance. Therefore, if an administrator mistakenly specifies
multiple `trace_instance=` options with duplicate names, all are
created but only the first is accessible via tracefs.

Check whether an instance with the same name already exists before
creating a new one, and reject duplicates with a warning.

Link: https://patch.msgid.link/178847790399.283263.5313150997200138426.stgit@devnote2
Fixes: e645535a95 ("tracing: Add option to use memmapped memory for trace boot instance")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

2026-09-04 11:44:40 -04:00

..

rv

rv: Fix 32-bit build of nomiss KUnit test

2026-08-04 16:11:27 +02:00

blktrace.c

Merge tag 'block-7.0-20260305' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

2026-03-06 08:36:18 -08:00

bpf_trace.c

bpf: Make bpf_trampoline_multi_detach return void

2026-08-13 02:52:23 +02:00

bpf_trace.h

…

error_report-traces.c

…

fgraph.c

fgraph: Do not call handlers direct when not using ftrace_ops

2026-02-19 15:21:22 -05:00

fprobe.c

Merge tag 'probes-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-08-20 15:11:52 -07:00

ftrace_internal.h

…

ftrace.c

ftrace: Synchronize the initialization of ftrace_ops

2026-09-02 11:08:21 -04:00

Kconfig

tracing/probes: Support dumping fetcharg program for debugging dynamic events

2026-07-02 21:12:40 +09:00

kprobe_event_gen_test.c

…

Makefile

Merge tag 'trace-v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-06-18 20:53:00 -07:00

pid_list.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

pid_list.h

trace/pid_list: optimize pid_list->lock contention

2025-11-13 15:15:54 -05:00

power-traces.c

PM: cpufreq: powernv/tracing: Move powernv_throttle trace event

2025-07-21 16:40:56 -04:00

preemptirq_delay_test.c

tracing: Reject invalid preemptirq_delay_test CPU affinity

2026-07-28 07:18:50 -04:00

remote_test_events.h

tracing: Add a trace remote module for testing

2026-03-09 12:33:55 -04:00

remote_test.c

tracing: Fix desc in error path for the trace remote test module

2026-05-16 16:11:04 -04:00

rethook.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

ring_buffer_benchmark.c

tracing: Fix typo in ring_buffer_benchmark.c

2025-12-05 15:43:40 -05:00

ring_buffer.c

ring-buffer: Add checking nr_subbufs to persistent ring buffer validation

2026-09-03 14:32:49 -04:00

rpm-traces.c

…

simple_ring_buffer.c

tracing: Fix retry exhaustion in simple ring buffer reader swap

2026-08-27 21:31:41 -04:00

synth_event_gen_test.c

…

trace_benchmark.c

…

trace_benchmark.h

…

trace_boot.c

tracing/boot: Add support for eprobe, fprobe, and tprobe events

2026-08-08 21:20:55 +09:00

trace_branch.c

tracing/branch: Use pr_warn() instead of printk(KERN_WARNING)

2026-05-21 18:03:08 -04:00

trace_btf.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

trace_btf.h

…

trace_clock.c

…

trace_dynevent.c

tracing/boot: Add support for eprobe, fprobe, and tprobe events

2026-08-08 21:20:55 +09:00

trace_dynevent.h

tracing: probes: Fix a possible race in trace_probe_log APIs

2025-05-13 22:23:34 +09:00

trace_entries.h

tracing: Fix ftrace event field alignments

2026-02-05 09:47:11 -05:00

trace_eprobe.c

Merge tag 'probes-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-08-20 15:11:52 -07:00

trace_event_perf.c

perf/ftrace: Fix WARNING in __unregister_ftrace_function

2026-05-29 11:27:40 -04:00

trace_events_filter_test.h

…

trace_events_filter.c

tracing/filters: Fix false positive match in regex_match_full()

2026-07-29 14:32:11 -04:00

trace_events_hist.c

tracing: Fix use-after-free with same-name named triggers

2026-08-22 17:33:57 -04:00

trace_events_inject.c

…

trace_events_synth.c

tracing/synthetic: Free type string on error path

2026-07-07 13:59:55 -04:00

trace_events_trigger.c

tracing: Cleanup event_enable_trigger_parse() by using __free()

2026-08-11 10:23:38 -04:00

trace_events_user.c

tracing/user_events: Clear copied tracing state before fork duplication

2026-08-27 21:30:22 -04:00

trace_events.c

tracing: Have show_event_filters/triggers files take trace array ref

2026-09-01 16:36:52 -04:00

trace_export.c

tracing: Fix ftrace event field alignments

2026-02-05 09:47:11 -05:00

trace_fprobe.c

Merge tag 'probes-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-08-20 15:11:52 -07:00

trace_functions_graph.c

fgraph: Use trace_seq_putc() in print_graph_return()

2026-07-28 07:18:50 -04:00

trace_functions.c

ftrace: Take trace_array reference before accessing its ftrace_ops

2026-09-01 16:38:19 -04:00

trace_hwlat.c

tracing: Fix false sharing in hwlat get_sample()

2026-02-10 03:36:39 -05:00

trace_irqsoff.c

tracing: Allow tracer to add more than 32 options

2025-11-04 21:44:00 +09:00

trace_kdb.c

tracing: Allow tracer to add more than 32 options

2025-11-04 21:44:00 +09:00

trace_kprobe_selftest.c

…

trace_kprobe_selftest.h

…

trace_kprobe.c

tracing/probes: Treating longer symbol name on event comparation

2026-07-28 23:55:35 +09:00

trace_mmiotrace.c

Merge tag 'trace-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-08-19 14:06:14 -07:00

trace_nop.c

…

trace_osnoise.c

tracing/osnoise: Call synchronize_rcu() when unregistering

2026-07-06 14:56:18 -04:00

trace_output.c

Merge tag 'trace-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-04-17 09:43:12 -07:00

trace_output.h

tracing: Allow tracer to add more than 32 options

2025-11-04 21:44:00 +09:00

trace_pid.c

tracing: Move pid filtering into trace_pid.c

2026-02-08 21:01:13 -05:00

trace_preemptirq.c

tracing: Add a no-rcu-check version of trace_##event##_enabled()

2026-07-07 10:42:29 -04:00

trace_printk.c

kernel/trace/trace_printk: Use kstrdup() instead of kmalloc() and strcpy()

2026-07-28 07:18:48 -04:00

trace_probe_kernel.h

tracing/probes: Fix extra whitespace in trace_probe_kernel.h

2026-07-21 18:00:13 +09:00

trace_probe_tmpl.h

tracing/probes: Add this_cpu_read() and this_cpu_ptr() dereference method to fetcharg

2026-07-14 22:43:16 +09:00

trace_probe.c

Merge tag 'probes-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2026-08-20 15:11:52 -07:00

trace_probe.h

tracing/probes: Treating longer symbol name on event comparation

2026-07-28 23:55:35 +09:00

trace_recursion_record.c

tracing: Switch trace_recursion_record.c code over to use guard()

2026-05-21 18:03:07 -04:00

trace_remote.c

tracing: Propagate errors from remote event bulk updates

2026-07-23 12:30:07 -04:00

trace_sched_switch.c

tracing: Use strscpy() instead of strcpy() in trace_sched_switch

2026-07-28 07:18:50 -04:00

trace_sched_wakeup.c

tracing: Allow tracer to add more than 32 options

2025-11-04 21:44:00 +09:00

trace_selftest_dynamic.c

…

trace_selftest.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

trace_seq.c

tracing: Add bitmask-list option for human-readable bitmask display

2026-01-26 17:00:50 -05:00

trace_snapshot.c

tracing: Remove duplicate latency_fsnotify() stub

2026-03-31 14:58:39 -04:00

trace_stack.c

ftrace: Take trace_array reference before accessing its ftrace_ops

2026-09-01 16:38:19 -04:00

trace_stat.c

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-21 17:09:51 -08:00

trace_stat.h

…

trace_synth.h

…

trace_syscalls.c

tracing: Make per-template BTF id lists file-local

2026-08-05 22:02:29 -04:00

trace_uprobe.c

tracing/probes: Treating longer symbol name on event comparation

2026-07-28 23:55:35 +09:00

trace.c

tracing: Fix to avoid creating trace instances with duplicate names

2026-09-04 11:44:40 -04:00

trace.h

ftrace: Take trace_array reference before accessing its ftrace_ops

2026-09-01 16:38:19 -04:00

tracing_map.c

tracing: Simplify pages allocation for tracing_map logic

2026-05-21 18:12:10 -04:00

tracing_map.h

tracing: Simplify pages allocation for tracing_map logic

2026-05-21 18:12:10 -04:00

undefsyms_base.c

tracing: Make undefsyms_base.c a first-class citizen

2026-04-22 11:24:41 -04:00