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linux/kernel/trace
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Shrikanth Hegde 24e0e61040 tracing: Print lazy preemption model 
Print lazy preemption model in ftrace header when latency-format=1.

 # cat /sys/kernel/debug/sched/preempt
 none voluntary full (lazy)

Without patch:
  latency: 0 us, #232946/232946, CPU#40 | (M:unknown VP:0, KP:0, SP:0 HP:0 #P:80)
                                             ^^^^^^^

With Patch:
  latency: 0 us, #1897938/25566788, CPU#16 | (M:lazy VP:0, KP:0, SP:0 HP:0 #P:80)
                                                ^^^^

Now that lazy preemption is part of the kernel, make sure the tracing
infrastructure reflects that.

Link: https://lore.kernel.org/20250103093647.575919-1-sshegde@linux.ibm.com
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2025-01-14 09:44:33 -05:00
..
rv rv: Fix a typo 2024-10-04 19:09:23 -04:00
blktrace.c
bpf_trace.c bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog 2024-12-10 10:16:28 -08:00
bpf_trace.h tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
error_report-traces.c
fgraph.c fgraph: Add READ_ONCE() when accessing fgraph_array[] 2025-01-02 17:21:18 -05:00
fprobe.c
ftrace.c ftrace: Fix function profiler's filtering functionality 2025-01-02 17:21:33 -05:00
ftrace_internal.h function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE 2024-06-10 18:08:23 -04:00
Kconfig function_graph: Support recording and printing the function return address 2024-10-05 10:14:04 -04:00
kprobe_event_gen_test.c
Makefile
pid_list.c trace/pid_list: Change gfp flags in pid_list_fill_irq() 2024-07-15 15:07:14 -04:00
pid_list.h
power-traces.c
preemptirq_delay_test.c minmax: make generic MIN() and MAX() macros available everywhere 2024-07-28 15:49:18 -07:00
rethook.c
ring_buffer.c ring-buffer: Fix overflow in __rb_map_vma 2024-12-18 14:15:10 -05:00
ring_buffer_benchmark.c ring-buffer: Use str_low_high() helper in ring_buffer_producer() 2024-10-19 11:12:25 -04:00
rpm-traces.c
synth_event_gen_test.c
trace.c tracing: Print lazy preemption model 2025-01-14 09:44:33 -05:00
trace.h tracing: Check "%s" dereference via the field and not the TP_printk format 2024-12-17 11:40:11 -05:00
trace_benchmark.c
trace_benchmark.h
trace_boot.c
trace_branch.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_btf.c
trace_btf.h
trace_clock.c tracing: Use atomic64_inc_return() in trace_clock_counter() 2024-10-09 19:59:49 -04:00
trace_dynevent.c
trace_dynevent.h
trace_entries.h function_graph: Support recording and printing the function return address 2024-10-05 10:14:04 -04:00
trace_eprobe.c tracing/eprobe: Fix to release eprobe when failed to add dyn_event 2024-12-08 23:25:09 +09:00
trace_event_perf.c trace/trace_event_perf: remove duplicate samples on the first tracepoint event 2024-10-09 19:44:54 -04:00
trace_events.c tracing: Have process_string() also allow arrays 2024-12-31 00:10:32 -05:00
trace_events_filter.c tracing: Replace multiple deprecated strncpy with memcpy 2024-10-30 19:41:08 -04:00
trace_events_filter_test.h
trace_events_hist.c tracing: Remove redundant check on field->field in histograms 2024-11-12 11:36:57 -05:00
trace_events_inject.c tracing: Have format file honor EVENT_FILE_FL_FREED 2024-08-07 18:12:46 -04:00
trace_events_synth.c
trace_events_trigger.c tracing: Have format file honor EVENT_FILE_FL_FREED 2024-08-07 18:12:46 -04:00
trace_events_user.c tracepoints: Use new static branch API 2024-10-08 21:17:39 -04:00
trace_export.c
trace_fprobe.c tracing/probes: Fix MAX_TRACE_ARGS limit handling 2024-10-23 17:24:44 +09:00
trace_functions.c ftrace: Do not find "true_parent" if HAVE_DYNAMIC_FTRACE_WITH_ARGS is not set 2024-12-16 17:22:26 -05:00
trace_functions_graph.c tracing updates for v6.13: 2024-11-22 13:27:01 -08:00
trace_hwlat.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_irqsoff.c tracing: Fix irqsoff and wakeup latency tracers when using function graph 2025-01-14 09:38:09 -05:00
trace_kdb.c trace: kdb: Replace simple_strtoul with kstrtoul in kdb_ftdump 2024-11-02 08:33:13 +00:00
trace_kprobe.c tracing/kprobes: Fix to free objects when failed to copy a symbol 2025-01-10 08:57:18 +09:00
trace_kprobe_selftest.c
trace_kprobe_selftest.h
trace_mmiotrace.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_nop.c
trace_osnoise.c tracing: Remove TRACE_EVENT_FL_FILTERED logic 2024-10-08 15:24:49 -04:00
trace_output.c tracing: Check "%s" dereference via the field and not the TP_printk format 2024-12-17 11:40:11 -05:00
trace_output.h
trace_preemptirq.c tracing: Fix archs that still call tracepoints without RCU watching 2024-12-05 09:28:58 -05:00
trace_printk.c
trace_probe.c tracing: Consider the NULL character when validating the event length 2024-10-23 17:24:47 +09:00
trace_probe.h
trace_probe_kernel.h
trace_probe_tmpl.h
trace_recursion_record.c
trace_sched_switch.c tracing: Replace strncpy() with strscpy() when copying comm 2024-11-01 14:37:31 -04:00
trace_sched_wakeup.c tracing: Fix irqsoff and wakeup latency tracers when using function graph 2025-01-14 09:38:09 -05:00
trace_selftest.c ftrace updates for v6.13: 2024-11-20 11:34:10 -08:00
trace_selftest_dynamic.c
trace_seq.c
trace_stack.c sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
trace_stat.c
trace_stat.h
trace_synth.h
trace_syscalls.c tracing/perf: Add might_fault check to syscall probes 2024-10-09 17:09:46 -04:00
trace_uprobe.c bpf: Fix theoretical prog_array UAF in __uprobe_perf_func() 2024-12-10 13:06:51 -08:00
tracing_map.c tracing: Fix cmp_entries_dup() to respect sort() comparison rules 2024-12-04 10:38:24 -05:00
tracing_map.h