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7acf3a127bb7c65ff39099afd78960e77b2ca5de
linux/kernel/trace
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Sven Schnelle 7acf3a127b tracing: Ensure trace buffer is at least 4096 bytes large 
Booting the kernel with 'trace_buf_size=1' give a warning at
boot during the ftrace selftests:

[    0.892809] Running postponed tracer tests:
[    0.892893] Testing tracer function:
[    0.901899] Callback from call_rcu_tasks_trace() invoked.
[    0.983829] Callback from call_rcu_tasks_rude() invoked.
[    1.072003] .. bad ring buffer .. corrupted trace buffer ..
[    1.091944] Callback from call_rcu_tasks() invoked.
[    1.097695] PASSED
[    1.097701] Testing dynamic ftrace: .. filter failed count=0 ..FAILED!
[    1.353474] ------------[ cut here ]------------
[    1.353478] WARNING: CPU: 0 PID: 1 at kernel/trace/trace.c:1951 run_tracer_selftest+0x13c/0x1b0

Therefore enforce a minimum of 4096 bytes to make the selftest pass.

Link: https://lkml.kernel.org/r/20220214134456.1751749-1-svens@linux.ibm.com

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2022-02-25 12:07:01 -05:00
..
blktrace.c
blktrace: switch trace spinlock to a raw spinlock
2021-12-20 13:50:14 -07:00
bpf_trace.c
bpf: Add MEM_RDONLY for helper args that are pointers to rdonly mem.
2021-12-18 13:27:41 -08:00
bpf_trace.h
bpf: Use dedicated bpf_trace_printk event instead of trace_printk()
2020-07-13 16:55:49 -07:00
error_report-traces.c
tracing: add error_report_end trace point
2021-02-26 09:41:02 -08:00
fgraph.c
x86/ftrace: Make function graph use ftrace directly
2021-10-20 23:44:43 -04:00
ftrace_internal.h
x86/ftrace: Have ftrace trampolines turn read-only at the end of system boot up
2020-05-12 18:24:34 -04:00
ftrace.c
Merge tag 'trace-v5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2022-01-23 08:07:02 +02:00
Kconfig
ftrace: Have architectures opt-in for mcount build time sorting
2022-01-27 19:15:44 -05:00
kprobe_event_gen_test.c
tracing: Add kprobe event command generation test module
2020-01-30 09:46:28 -05:00
Makefile
tracing: Place trace_pid_list logic into abstract functions
2021-10-05 17:30:08 -04:00
pid_list.c
tracing: Initialize upper and lower vars in pid_list_refill_irq()
2021-10-07 09:56:38 -04:00
pid_list.h
tracing: Create a sparse bitmask for pid filtering
2021-10-05 17:38:45 -04:00
power-traces.c
…
preemptirq_delay_test.c
kernel: trace: preemptirq_delay_test: add cpu affinity
2021-02-02 17:02:07 -05:00
ring_buffer_benchmark.c
sched,tracing: Convert to sched_set_fifo()
2020-07-29 11:43:53 +02:00
ring_buffer.c
ring-buffer: make use of the helper function kthread_run_on_cpu()
2022-01-15 16:30:23 +02:00
rpm-traces.c
…
synth_event_gen_test.c
tracing: Fix various typos in comments
2021-03-23 14:08:18 -04:00
trace_benchmark.c
tracing: Fix some typos in comments
2020-11-10 20:39:40 -05:00
trace_benchmark.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_boot.c
tracing: Fix missing trace_boot_init_histograms kstrdup NULL checks
2021-10-26 09:18:10 -04:00
trace_branch.c
tracing: Merge irqflags + preempt counter.
2021-02-02 17:02:06 -05:00
trace_clock.c
tracing: Do no increment trace_clock_global() by one
2021-06-18 09:10:00 -04:00
trace_dynevent.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_dynevent.h
tracing: Add DYNAMIC flag for dynamic events
2021-08-18 18:10:32 -04:00
trace_entries.h
trace: Add timerlat tracer
2021-06-25 19:57:24 -04:00
trace_eprobe.c
eprobes: Remove redundant event type information
2022-02-25 12:07:01 -05:00
trace_event_perf.c
tracing: Show size of requested perf buffer
2021-10-27 12:25:09 -04:00
trace_events_filter_test.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_events_filter.c
tracing: Add ustring operation to filtering string pointers
2022-01-14 03:42:24 -05:00
trace_events_hist.c
tracing: Propagate is_signed to expression
2022-01-27 19:15:49 -05:00
trace_events_inject.c
tracing: Support __rel_loc relative dynamic data location attribute
2021-12-06 15:37:21 -05:00
trace_events_synth.c
Merge tag 'trace-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2022-01-16 10:15:32 +02:00
trace_events_trigger.c
tracing: Uninline trace_trigger_soft_disabled() partly
2022-02-25 12:07:01 -05:00
trace_events.c
tracing: Remove duplicate warnings when calling trace_create_file()
2022-01-13 17:02:42 -05:00
trace_export.c
tracing: Fix some typos in comments
2020-11-10 20:39:40 -05:00
trace_functions_graph.c
tracing: in_irq() cleanup
2021-10-13 18:19:41 -04:00
trace_functions.c
ftrace: disable preemption when recursion locked
2021-10-27 11:21:49 -04:00
trace_hwlat.c
trace/hwlat: make use of the helper function kthread_run_on_cpu()
2022-01-15 16:30:24 +02:00
trace_irqsoff.c
tracing: Merge irqflags + preempt counter.
2021-02-02 17:02:06 -05:00
trace_kdb.c
kdb: Rename members of struct kdbtab_t
2021-07-27 17:05:06 +01:00
trace_kprobe_selftest.c
selftest/ftrace: Move kprobe selftest function to separate compile unit
2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_kprobe.c
Merge tag 'trace-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2022-01-16 10:15:32 +02:00
trace_mmiotrace.c
tracing: Remove definition of DEBUG in trace_mmiotrace.c
2021-02-02 17:02:07 -05:00
trace_nop.c
…
trace_osnoise.c
Merge tag 'trace-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2022-01-16 10:15:32 +02:00
trace_output.c
tracing: Account bottom half disabled sections.
2022-01-13 16:23:04 -05:00
trace_output.h
ftrace: Add recording of functions that caused recursion
2020-11-06 08:42:26 -05:00
trace_preemptirq.c
lockdep: fix order in trace_hardirqs_off_caller()
2020-09-14 10:08:07 +02:00
trace_printk.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_probe_tmpl.h
tracing/probes: Have process_fetch_insn() take a void * instead of pt_regs
2021-08-19 09:09:03 -04:00
trace_probe.c
eprobes: Remove redundant event type information
2022-02-25 12:07:01 -05:00
trace_probe.h
eprobes: Remove redundant event type information
2022-02-25 12:07:01 -05:00
trace_recursion_record.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_sched_switch.c
tracing: Fix sched switch start/stop refcount racy updates
2020-01-30 09:46:10 -05:00
trace_sched_wakeup.c
tracing: Change variable type as bool for clean-up
2021-06-30 09:19:14 -04:00
trace_selftest_dynamic.c
ftrace: Mark function tracer test functions noinline/noclone
2018-01-23 15:57:29 -05:00
trace_selftest.c
tracing: Fix selftest config check for function graph start up test
2021-10-21 14:18:48 -04:00
trace_seq.c
tracing: Fix various typos in comments
2021-03-23 14:08:18 -04:00
trace_stack.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_stat.c
tracing: Disable "other" permission bits in the tracefs files
2021-10-08 18:08:43 -04:00
trace_stat.h
tracing: Use generic type for comparator function
2019-11-14 13:15:11 -05:00
trace_synth.h
tracing: synth events: increase max fields count
2021-09-08 15:29:16 -04:00
trace_syscalls.c
tracing: Have syscall trace events use trace_event_buffer_lock_reserve()
2022-01-13 16:23:05 -05:00
trace_uprobe.c
Merge tag 'trace-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2022-01-16 10:15:32 +02:00
trace.c
tracing: Ensure trace buffer is at least 4096 bytes large
2022-02-25 12:07:01 -05:00
trace.h
eprobes: Remove redundant event type information
2022-02-25 12:07:01 -05:00
tracing_map.c
tracing: Fix a kmemleak false positive in tracing_map
2021-12-01 21:04:34 -05:00
tracing_map.h
tracing: Fix some typos in comments
2020-11-10 20:39:40 -05:00