Sven Schnelle 1c9addbfba tracing: Ensure trace buffer is at least 4096 bytes large ...

[ Upstream commit 7acf3a127b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-05-16 12:46:04 +09:00

..

blktrace.c

blktrace: Fix uaf in blk_trace access after removing by sysfs

2023-05-16 11:53:16 +09:00

bpf_trace.c

bpf: fix check of allowed specifiers in bpf_trace_printk

2023-05-15 10:31:16 +09:00

ftrace.c

tracing: Have all levels of checks prevent recursion

2023-05-16 12:01:39 +09:00

gpu-traces.c

ANDROID: trace/events: add gpu trace events

2017-01-27 13:51:39 -08:00

Kconfig

Stop the ad-hoc games with -Wno-maybe-initialized

2023-05-12 16:26:08 +09:00

Makefile

FROMLIST: tracing: Add support for preempt and irq enable/disable events

2017-10-06 16:20:25 -07:00

power-traces.c

cpufreq: schedutil: New governor based on scheduler utilization data

2016-04-02 01:09:12 +02:00

ring_buffer_benchmark.c

ring_buffer: Remove unneeded smp_wmb() before wakeup of reader benchmark

2015-11-03 16:19:02 -05:00

ring_buffer.c

tracing: Fix bug in rb_per_cpu_empty() that might cause deadloop.

2023-05-16 11:34:29 +09:00

rpm-traces.c

PM / Runtime: Introduce trace points for tracing rpm_* functions

2011-09-27 22:53:27 +02:00

trace_benchmark.c

tracing: Only benchmark the time tracepoints take if tracing is on

2015-11-02 13:34:58 -05:00

trace_benchmark.h

tracing: Add tracepoint benchmark tracepoint

2014-05-29 22:49:54 -04:00

trace_branch.c

tracing: Remove {start,stop}_branch_trace

2015-10-21 10:10:09 -04:00

trace_clock.c

tracing: Do no increment trace_clock_global() by one

2023-05-16 11:15:38 +09:00

trace_entries.h

tracing: Set kernel_stack's caller size properly

2023-05-16 09:15:20 +09:00

trace_event_perf.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

2016-05-17 16:26:30 -07:00

trace_events_filter_test.h

tracing/filter: Add startup tests for events filter

2011-08-19 14:35:59 -04:00

trace_events_filter.c

tracing: Fix regex_match_front() to not over compare the test string

2018-05-16 10:08:43 +02:00

trace_events_hist.c

tracing: Do not reference char * as a string in histograms

2023-05-16 11:26:29 +09:00

trace_events_trigger.c

tracing: Fix event trigger to accept redundant spaces

2023-05-16 08:22:02 +09:00

trace_events.c

tracing: Check pid filtering when creating events

2023-05-16 12:21:05 +09:00

trace_export.c

tracing: ftrace_event_is_function() can return boolean

2015-11-02 14:28:05 -05:00

trace_functions_graph.c

Merge 4.9.112 into android-4.9

2018-07-11 16:40:16 +02:00

trace_functions.c

tracing: Have all levels of checks prevent recursion

2023-05-16 12:01:39 +09:00

trace_hwlat.c

tracing/hwlat: Honor the tracing_cpumask

2023-05-16 08:54:33 +09:00

trace_irqsoff.c

FROMLIST: tracing: Add support for preempt and irq enable/disable events

2017-10-06 16:20:25 -07:00

trace_kdb.c

tracing: Silence GCC 9 array bounds warning

2023-05-15 13:54:34 +09:00

trace_kprobe.c

tracing: Quiet gcc warning about maybe unused link variable

2023-05-12 16:39:00 +09:00

trace_mmiotrace.c

tracing: Expose CPU physical addresses (resource values) for PCI devices

2016-06-20 09:54:22 -04:00

trace_nop.c

tracing: Fix typoes in code comment and printk in trace_nop.c

2016-03-08 11:23:57 -05:00

trace_output.c

ANDROID: trace: fix compilation for 4.1

2017-01-27 13:51:42 -08:00

trace_output.h

tracing: Turn seq_print_user_ip() into a static function

2015-09-28 10:16:12 -04:00

trace_printk.c

tracing: Handle NULL formats in hold_module_trace_bprintk_format()

2016-06-20 09:46:12 -04:00

trace_probe.c

tracing: probeevent: Fix to support minus offset from symbol

2018-03-28 18:39:23 +02:00

trace_probe.h

tracing: probeevent: Fix to support minus offset from symbol

2018-03-28 18:39:23 +02:00

trace_sched_switch.c

sched/core: Fix trace_sched_switch()

2015-10-06 17:08:15 +02:00

trace_sched_wakeup.c

kernel/trace: Fix do not unregister tracepoints when register sched_migrate_task fail

2023-05-15 16:33:02 +09:00

trace_selftest_dynamic.c

ftrace: Add self-tests for multiple function trace users

2011-05-18 19:24:51 -04:00

trace_selftest.c

ftrace: Handle tracing when switching between context

2023-05-16 09:46:07 +09:00

trace_seq.c

tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:37 -08:00

trace_stack.c

tracing: Have stack tracer compile when MCOUNT_INSN_SIZE is not defined

2023-05-15 16:33:03 +09:00

trace_stat.c

tracing: Fix very unlikely race of registering two stat tracers

2023-05-15 16:58:23 +09:00

trace_stat.h

tracing/stat: Add stat_release() callback

2009-07-10 12:14:05 +02:00

trace_syscalls.c

tracing/syscalls: fix multiline in error message text

2016-09-29 10:25:23 +02:00

trace_uprobe.c

tracing/uprobes: Fix output for multiple string arguments

2023-05-15 11:34:35 +09:00

trace.c

tracing: Ensure trace buffer is at least 4096 bytes large

2023-05-16 12:46:04 +09:00

trace.h

tracing: Fix pid filtering when triggers are attached

2023-05-16 12:20:53 +09:00

tracing_map.c

tracing: Fix a kmemleak false positive in tracing_map

2023-05-16 12:22:56 +09:00

tracing_map.h

tracing: Update some tracing_map constants and comments

2016-04-19 12:16:06 -04:00