* [PATCH v3 1/4] selftests/ftrace: Add generic boot tracing test framework
2026-08-12 0:43 [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu (Google)
@ 2026-08-12 0:43 ` Masami Hiramatsu (Google)
2026-08-12 0:43 ` [PATCH v3 2/4] selftests/ftrace: Add boot-time tracing testcases Masami Hiramatsu (Google)
` (3 subsequent siblings)
4 siblings, 0 replies; 7+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-12 0:43 UTC (permalink / raw)
To: Steven Rostedt, Masami Hiramatsu, Shuah Khan
Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel,
linux-kselftest
From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Add a generic test framework under tools/testing/selftests/ftrace/boottime/
to verify kernel boot tracing configurations (bootconfig, kernel
command-line tracing options, and persistent ring buffers) during early
boot.
The test runner (run_boottime_test.sh) sources ktap_helpers.sh to generate
output in TAP version 13 format. It builds a minimal initramfs with busybox,
dynamically resolves test specifications (.bconf for bootconfig, .cmdline
for kernel boot parameters, .qemuopts for QEMU options, and # REBOOT: 1
for multi-boot crash/reboot tests with doubled timeout), boots QEMU, and
runs corresponding tracefs checker scripts.
Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
Changes in v3:
- Require file command and check kernel binary architecture via file -bL
instead of matching kernel path string in run_boottime_test.sh.
- Use 'cp -L' when copying BUSYBOX into initramfs to dereference
symbolic links.
- Use 'ln -sf' when creating BusyBox applet symlinks in initramfs.
- Add support for '# APPLETS: <applets>' header in test scripts to
dynamically create BusyBox applet symlinks in initramfs.
- Update boottime test README to document file command dependency and
'# APPLETS:' header syntax.
Changes in v2:
- Add top-level boottime-ktap wrapper script and include it in
TEST_PROGS in Makefile.
- Define BUSYBOX_APPLETS as a global array variable including sleep
and sed.
- Require timeout tool in run_boottime_test.sh and README, and always
invoke QEMU under timeout command to prevent infinite execution loops.
- Add fallback sleep loop safeguard (sleep 100 || break) in guest
init script.
- Support multi-line .qemuopts files using read -r -d '' -a qemu_args.
---
tools/testing/selftests/ftrace/Makefile | 4
tools/testing/selftests/ftrace/boottime-ktap | 6
tools/testing/selftests/ftrace/boottime/Makefile | 10
tools/testing/selftests/ftrace/boottime/README | 74 ++++
.../selftests/ftrace/boottime/run_boottime_test.sh | 403 ++++++++++++++++++++
tools/testing/selftests/ftrace/config | 6
6 files changed, 501 insertions(+), 2 deletions(-)
create mode 100755 tools/testing/selftests/ftrace/boottime-ktap
create mode 100644 tools/testing/selftests/ftrace/boottime/Makefile
create mode 100644 tools/testing/selftests/ftrace/boottime/README
create mode 100755 tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
diff --git a/tools/testing/selftests/ftrace/Makefile b/tools/testing/selftests/ftrace/Makefile
index 7c12263f8260..3d41f9545683 100644
--- a/tools/testing/selftests/ftrace/Makefile
+++ b/tools/testing/selftests/ftrace/Makefile
@@ -2,8 +2,8 @@
all:
TEST_PROGS_EXTENDED := ftracetest
-TEST_PROGS := ftracetest-ktap
-TEST_FILES := test.d settings
+TEST_PROGS := ftracetest-ktap boottime-ktap
+TEST_FILES := test.d settings boottime
EXTRA_CLEAN := $(OUTPUT)/logs/*
TEST_GEN_FILES := poll
diff --git a/tools/testing/selftests/ftrace/boottime-ktap b/tools/testing/selftests/ftrace/boottime-ktap
new file mode 100755
index 000000000000..1fed68c8a944
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime-ktap
@@ -0,0 +1,6 @@
+#!/bin/sh -e
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# boottime-ktap: Wrapper to integrate boottime tracing test framework with kselftest runner
+
+exec ./boottime/run_boottime_test.sh "$@"
diff --git a/tools/testing/selftests/ftrace/boottime/Makefile b/tools/testing/selftests/ftrace/boottime/Makefile
new file mode 100644
index 000000000000..fd0975350f10
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0
+
+all:
+
+run_tests:
+ @./run_boottime_test.sh
+
+clean:
+
+.PHONY: all run_tests clean
diff --git a/tools/testing/selftests/ftrace/boottime/README b/tools/testing/selftests/ftrace/boottime/README
new file mode 100644
index 000000000000..1eb0191d75d4
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/README
@@ -0,0 +1,74 @@
+Boot Tracing Test Suite
+=======================
+
+This directory contains an automated test framework to verify kernel boot
+tracing configurations (bootconfig, kernel command-line tracing options, and
+persistent ring buffers) during early boot.
+
+Overview
+--------
+The test runner (`run_boottime_test.sh`) constructs a lightweight initramfs with
+busybox and a tracefs checker script from `tests/`, attaches optional bootconfigs
+from `bootconfigs/` using the `bootconfig` tool, applies optional command-line
+parameters from `cmdlines/`, boots the target kernel image under QEMU, and reports
+results according to TAP version 13 format.
+
+Test Specification Format
+-------------------------
+For each test script `tests/<name>.sh`, the harness dynamically detects:
+- `bootconfigs/<name>.bconf` or `<name>.bconf`: Bootconfig configuration file.
+- `cmdlines/<name>.cmdline` or `# CMDLINE: <opts>` header in script: Kernel boot parameters.
+- `qemuopts/<name>.qemuopts` or `# QEMUOPTS: <opts>` header in script: Additional QEMU CLI arguments.
+- `# APPLETS: <applets>` header in script: Additional BusyBox applet symlinks to create in initramfs.
+- `# REBOOT: 1` header in script: Multi-boot reboot/crash test mode (omits `-no-reboot` and doubles timeout).
+
+Required Tools
+--------------
+- Host Architecture: x86 (x86_64/i686/i386/x86; tests skip on non-x86 hosts)
+- `qemu-system-x86_64` (or custom QEMU executable)
+- `busybox` (host binary at `/usr/bin/busybox` or custom path)
+- `bootconfig` (compiled from `tools/bootconfig/bootconfig` or in PATH)
+- `file` (standard file architecture identifier)
+- `cpio` (standard archiver)
+- `timeout` (standard coreutils execution timer)
+
+Required Kernel Configurations
+------------------------------
+The kernel binary under test must be compiled with:
+- `CONFIG_BOOT_CONFIG=y`
+- `CONFIG_BOOTTIME_TRACING=y`
+- `CONFIG_MAGIC_SYSRQ=y` (for guest reboot and poweroff)
+
+Additional feature-specific config options enable respective testcases:
+- `CONFIG_KPROBE_EVENTS=y` (for kprobe tests)
+- `CONFIG_SYNTH_EVENTS=y` (for synthetic event tests)
+- `CONFIG_EPROBE_EVENTS=y` (for eprobe tests)
+- `CONFIG_FPROBE_EVENTS=y` (for fprobe and tracepoint probe tests)
+- `CONFIG_FUNCTION_TRACER=y` (for tracer options)
+- `CONFIG_RESERVE_MEM=y` (for persistent ring buffer tests)
+
+Usage
+-----
+To run all test cases with a compiled kernel image:
+
+ $ ./run_boottime_test.sh -k /path/to/bzImage
+
+To run a specific test case (e.g. `01-kprobe`):
+
+ $ ./run_boottime_test.sh -k /path/to/bzImage -t 01-kprobe
+
+Customizing Tool Paths:
+
+ $ ./run_boottime_test.sh -b /path/to/bootconfig \
+ -k /path/to/bzImage \
+ -q /path/to/qemu-system-x86_64 \
+ -B /path/to/busybox
+
+Environment Variables
+---------------------
+Tool locations and kernel paths can also be set via environment variables:
+- `BOOTCONFIG`: Path to the `bootconfig` tool
+- `KERNEL`: Path to the `bzImage` kernel binary
+- `QEMU`: Path to the QEMU binary
+- `BUSYBOX`: Path to the `busybox` binary
+- `LOGDIR`: Directory path to preserve QEMU execution log files
diff --git a/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh b/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
new file mode 100755
index 000000000000..6e8593d5a2c5
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
@@ -0,0 +1,403 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+#
+# Generic Boot Tracing Test Harness
+# Builds a lightweight initramfs, applies bootconfigs and kernel cmdline parameters,
+# boots QEMU, and verifies tracefs configuration using test scripts.
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [ -d "$SCRIPT_DIR/boottime" ]; then
+ SCRIPT_DIR="$SCRIPT_DIR/boottime"
+fi
+KERNEL_SRC="$(cd "$SCRIPT_DIR/../../../../.." && pwd)"
+
+# Source KTAP helpers
+if [ -f "$SCRIPT_DIR/../../kselftest/ktap_helpers.sh" ]; then
+ KSELFTEST_DIR="$(cd "$SCRIPT_DIR/../../kselftest" && pwd)"
+elif [ -f "$SCRIPT_DIR/../kselftest/ktap_helpers.sh" ]; then
+ KSELFTEST_DIR="$(cd "$SCRIPT_DIR/../kselftest" && pwd)"
+else
+ echo "Error: ktap_helpers.sh not found relative to $SCRIPT_DIR" >&2
+ exit 1
+fi
+. "$KSELFTEST_DIR/ktap_helpers.sh"
+
+BOOTCONFIG="${BOOTCONFIG:-"$KERNEL_SRC/tools/bootconfig/bootconfig"}"
+KERNEL="${KERNEL:-"$KERNEL_SRC/arch/x86/boot/bzImage"}"
+QEMU="${QEMU:-"qemu-system-x86_64"}"
+BUSYBOX="${BUSYBOX:-"$(which busybox 2>/dev/null || echo "/usr/bin/busybox")"}"
+TIMEOUT="${TIMEOUT:-60s}"
+LOGDIR="${LOGDIR:-""}"
+TARGET_TEST="all"
+
+BUSYBOX_APPLETS=(
+ sh
+ cat
+ mount
+ umount
+ echo
+ sync
+ reboot
+ poweroff
+ cpio
+ grep
+ sleep
+ sed
+)
+
+usage() {
+ echo "Usage: $0 [options]"
+ echo "Options:"
+ echo " -b, --bootconfig PATH Path to bootconfig tool (default: $BOOTCONFIG)"
+ echo " -k, --kernel PATH Path to kernel image (default: $KERNEL)"
+ echo " -q, --qemu PATH Path to QEMU executable (default: $QEMU)"
+ echo " -B, --busybox PATH Path to busybox binary (default: $BUSYBOX)"
+ echo " -T, --timeout DURATION QEMU execution timeout (default: $TIMEOUT)"
+ echo " -l, --logdir DIR Directory to save QEMU log files"
+ echo " -t, --test NAME Run specific test (e.g. 01-kprobe) or 'all'"
+ echo " -h, --help Show this help message"
+ exit 1
+}
+
+while [ $# -gt 0 ]; do
+ case "$1" in
+ -b|--bootconfig)
+ BOOTCONFIG="$2"
+ shift 2
+ ;;
+ -k|--kernel)
+ KERNEL="$2"
+ shift 2
+ ;;
+ -q|--qemu)
+ QEMU="$2"
+ shift 2
+ ;;
+ -B|--busybox)
+ BUSYBOX="$2"
+ shift 2
+ ;;
+ -T|--timeout)
+ TIMEOUT="$2"
+ shift 2
+ ;;
+ -l|--logdir)
+ LOGDIR="$2"
+ shift 2
+ ;;
+ -t|--test)
+ TARGET_TEST="$2"
+ shift 2
+ ;;
+ -h|--help)
+ usage
+ ;;
+ *)
+ echo "Unknown option: $1"
+ usage
+ ;;
+ esac
+done
+
+# Check host architecture
+HOST_ARCH="$(uname -m)"
+case "$HOST_ARCH" in
+ x86_64|i686|i386|x86)
+ ;;
+ *)
+ if [ "$KERNEL" = "$KERNEL_SRC/arch/x86/boot/bzImage" ]; then
+ ktap_print_header
+ ktap_skip_all \
+ "Default boot tracing test is x86 only ($HOST_ARCH)"
+ exit 0
+ fi
+ ;;
+esac
+
+# Ensure bootconfig tool is built if Makefile exists
+if [ ! -x "$BOOTCONFIG" ]; then
+ if [ -f "$KERNEL_SRC/tools/bootconfig/Makefile" ]; then
+ make -C "$KERNEL_SRC/tools/bootconfig" > /dev/null 2>&1 || true
+ fi
+ if [ ! -x "$BOOTCONFIG" ]; then
+ BOOTCONFIG="$(which bootconfig 2>/dev/null || true)"
+ fi
+fi
+
+if [ ! -x "$BOOTCONFIG" ]; then
+ ktap_print_header
+ ktap_skip_all "bootconfig tool not found at $BOOTCONFIG"
+ exit 0
+fi
+
+if [ ! -f "$KERNEL" ]; then
+ ktap_print_header
+ ktap_skip_all "Kernel image not found at $KERNEL"
+ exit 0
+fi
+
+if ! command -v "$QEMU" >/dev/null 2>&1; then
+ ktap_print_header
+ ktap_skip_all "QEMU binary not found: $QEMU"
+ exit 0
+fi
+
+if [ ! -x "$BUSYBOX" ]; then
+ ktap_print_header
+ ktap_skip_all "busybox binary not found at $BUSYBOX"
+ exit 0
+fi
+
+# Verify file command existence and architecture compatibility
+if ! command -v file >/dev/null 2>&1; then
+ ktap_print_header
+ ktap_skip_all "file tool not found"
+ exit 0
+fi
+
+KERNEL_INFO="$(file -bL "$KERNEL" 2>/dev/null || true)"
+case "$KERNEL_INFO" in
+ *x86*)
+ ;;
+ *)
+ ktap_print_header
+ ktap_skip_all "Kernel architecture is not x86 ($KERNEL_INFO)"
+ exit 0
+ ;;
+esac
+
+BUSYBOX_INFO="$(file -bL "$BUSYBOX" 2>/dev/null || true)"
+case "$BUSYBOX_INFO" in
+ *x86-64*|*x86_64*|*80386*|*i386*)
+ ;;
+ *)
+ ktap_print_header
+ ktap_skip_all \
+ "busybox binary architecture is incompatible with x86 kernel ($BUSYBOX_INFO)"
+ exit 0
+ ;;
+esac
+
+if ! command -v cpio >/dev/null 2>&1; then
+ ktap_print_header
+ ktap_skip_all "cpio tool not found"
+ exit 0
+fi
+
+if ! command -v timeout >/dev/null 2>&1; then
+ ktap_print_header
+ ktap_skip_all "timeout tool not found"
+ exit 0
+fi
+
+double_timeout() {
+ local val="$1"
+ if [[ "$val" =~ ^([0-9]+)([a-z]*)$ ]]; then
+ local num="${BASH_REMATCH[1]}"
+ local unit="${BASH_REMATCH[2]}"
+ echo "$((num * 2))$unit"
+ else
+ echo "120s"
+ fi
+}
+
+run_single_test() {
+ local test_script="$1"
+ local name
+ local dir
+ name="$(basename "$test_script" .sh)"
+ dir="$(dirname "$test_script")"
+
+ local bconf_file=""
+ if [ -f "$SCRIPT_DIR/bootconfigs/$name.bconf" ]; then
+ bconf_file="$SCRIPT_DIR/bootconfigs/$name.bconf"
+ elif [ -f "$dir/$name.bconf" ]; then
+ bconf_file="$dir/$name.bconf"
+ fi
+
+ local test_cmdline=""
+ if [ -f "$SCRIPT_DIR/cmdlines/$name.cmdline" ]; then
+ test_cmdline="$(cat "$SCRIPT_DIR/cmdlines/$name.cmdline")"
+ elif [ -f "$dir/$name.cmdline" ]; then
+ test_cmdline="$(cat "$dir/$name.cmdline")"
+ fi
+
+ local inline_cmdline
+ inline_cmdline="$(grep -E '^# *CMDLINE:' "$test_script" | sed 's/^# *CMDLINE://' | xargs || true)"
+ if [ -n "$inline_cmdline" ]; then
+ test_cmdline="$test_cmdline $inline_cmdline"
+ fi
+
+ local test_qemuopts=""
+ if [ -f "$SCRIPT_DIR/qemuopts/$name.qemuopts" ]; then
+ test_qemuopts="$(cat "$SCRIPT_DIR/qemuopts/$name.qemuopts")"
+ elif [ -f "$dir/$name.qemuopts" ]; then
+ test_qemuopts="$(cat "$dir/$name.qemuopts")"
+ fi
+
+ local inline_qemuopts
+ inline_qemuopts="$(grep -E '^# *QEMUOPTS:' "$test_script" | sed 's/^# *QEMUOPTS://' | xargs || true)"
+ if [ -n "$inline_qemuopts" ]; then
+ test_qemuopts="$test_qemuopts $inline_qemuopts"
+ fi
+
+ local test_timeout="$TIMEOUT"
+ local inline_timeout
+ inline_timeout="$(grep -E '^# *TIMEOUT:' "$test_script" | sed 's/^# *TIMEOUT://' | xargs || true)"
+ if [ -n "$inline_timeout" ]; then
+ test_timeout="$inline_timeout"
+ fi
+
+ local is_reboot=0
+ if grep -q -E '^# *REBOOT: *1' "$test_script" || [ -f "$dir/$name.reboot" ]; then
+ is_reboot=1
+ fi
+
+ local effective_timeout="$test_timeout"
+ if [ "$is_reboot" -eq 1 ]; then
+ effective_timeout="$(double_timeout "$test_timeout")"
+ fi
+
+ local workdir
+ workdir="$(mktemp -d)"
+ if [ -z "$workdir" ] || [ ! -d "$workdir" ]; then
+ ktap_test_fail "$name (failed to create temporary directory)"
+ return 0
+ fi
+ trap 'rm -rf "$workdir"' EXIT
+
+ local test_applets=("${BUSYBOX_APPLETS[@]}")
+ local inline_applets
+ inline_applets="$(grep -E '^# *APPLETS:' "$test_script" | sed 's/^# *APPLETS://' | xargs || true)"
+ if [ -n "$inline_applets" ]; then
+ read -r -a extra_applets <<< "$inline_applets" || true
+ test_applets+=("${extra_applets[@]}")
+ fi
+
+ local rootfs="$workdir/rootfs"
+ mkdir -p "$rootfs"/{bin,sbin,etc,proc,sys,dev,tmp}
+
+ cp -L "$BUSYBOX" "$rootfs/bin/busybox"
+ chmod +x "$rootfs/bin/busybox"
+ (cd "$rootfs/bin" && for applet in "${test_applets[@]}"; do ln -sf busybox "$applet"; done)
+
+ if command -v ldd >/dev/null 2>&1; then
+ for lib in $(ldd "$BUSYBOX" 2>/dev/null | grep -o '/[^ ]*' || true); do
+ if [ -f "$lib" ]; then
+ mkdir -p "$rootfs$(dirname "$lib")"
+ cp -L "$lib" "$rootfs$lib" 2>/dev/null || true
+ fi
+ done
+ fi
+
+ cat << 'EOF' > "$rootfs/init"
+#!/bin/sh
+mount -t proc proc /proc 2>/dev/null
+mount -t sysfs sys /sys 2>/dev/null
+mount -t tracefs nodev /sys/kernel/tracing 2>/dev/null
+
+/bin/check_test.sh
+RET=$?
+
+if [ $RET -eq 0 ]; then
+ echo "TEST RESULT: PASS"
+else
+ echo "TEST RESULT: FAIL"
+fi
+sync
+echo o > /proc/sysrq-trigger 2>/dev/null || true
+poweroff -f 2>/dev/null || reboot -f 2>/dev/null || true
+while true; do sleep 100 2>/dev/null || break; done
+EOF
+ chmod +x "$rootfs/init"
+
+ cp "$test_script" "$rootfs/bin/check_test.sh"
+ chmod +x "$rootfs/bin/check_test.sh"
+
+ local initramfs="$workdir/initramfs.cpio"
+ (cd "$rootfs" && find . | cpio -o -H newc --quiet) > "$initramfs"
+
+ if [ -n "$bconf_file" ] && [ -f "$bconf_file" ]; then
+ "$BOOTCONFIG" -a "$bconf_file" "$initramfs" > /dev/null
+ fi
+
+
+ local logfile
+ local base_cmdline="bootconfig console=tty0 console=ttyS0 panic=-1"
+ if [ -n "$test_cmdline" ]; then
+ base_cmdline="$base_cmdline $test_cmdline"
+ fi
+
+ if [ -n "$LOGDIR" ]; then
+ mkdir -p "$LOGDIR"
+ logfile="$LOGDIR/$name.log"
+ base_cmdline="$base_cmdline dump_bconf"
+ else
+ logfile="$workdir/qemu.log"
+ base_cmdline="quiet $base_cmdline"
+ fi
+
+ local qemu_args=()
+ if [ -n "$test_qemuopts" ]; then
+ read -r -d '' -a qemu_args <<< "$test_qemuopts" || true
+ fi
+
+ if [ "$is_reboot" -ne 1 ]; then
+ qemu_args+=("-no-reboot")
+ fi
+
+ timeout "$effective_timeout" "$QEMU" -kernel "$KERNEL" \
+ -initrd "$initramfs" \
+ -append "$base_cmdline" \
+ -display none \
+ -serial stdio \
+ "${qemu_args[@]}" < /dev/null > "$logfile" 2>&1 || true
+
+ if grep -q "TEST RESULT: PASS" "$logfile"; then
+ ktap_test_pass "$name"
+ else
+ ktap_test_fail "$name"
+ ktap_print_msg "QEMU Console Output for $name:"
+ while IFS= read -r line; do
+ ktap_print_msg "$line"
+ done < "$logfile"
+ fi
+
+ rm -rf "$workdir"
+ trap - EXIT
+ return 0
+}
+
+TEST_SCRIPTS=()
+if [ -d "$SCRIPT_DIR/tests" ]; then
+ while IFS= read -r f; do
+ [ -n "$f" ] && TEST_SCRIPTS+=("$f")
+ done < <(find "$SCRIPT_DIR/tests" -type f -name "*.sh" | sort)
+fi
+
+TOTAL_TESTS=0
+for test_script in "${TEST_SCRIPTS[@]}"; do
+ name="$(basename "$test_script" .sh)"
+ if [ "$TARGET_TEST" != "all" ] && [ "$TARGET_TEST" != "$name" ]; then
+ continue
+ fi
+ TOTAL_TESTS=$((TOTAL_TESTS + 1))
+done
+
+ktap_print_header
+ktap_set_plan "$TOTAL_TESTS"
+
+for test_script in "${TEST_SCRIPTS[@]}"; do
+ name="$(basename "$test_script" .sh)"
+
+ if [ "$TARGET_TEST" != "all" ] && [ "$TARGET_TEST" != "$name" ]; then
+ continue
+ fi
+
+ run_single_test "$test_script"
+done
+
+ktap_finished
diff --git a/tools/testing/selftests/ftrace/config b/tools/testing/selftests/ftrace/config
index 544de0db5f58..29f05f7c6e2c 100644
--- a/tools/testing/selftests/ftrace/config
+++ b/tools/testing/selftests/ftrace/config
@@ -1,3 +1,5 @@
+CONFIG_BOOT_CONFIG=y
+CONFIG_BOOTTIME_TRACING=y
CONFIG_BPF_SYSCALL=y
CONFIG_DEBUG_INFO_BTF=y
CONFIG_DEBUG_INFO_DWARF4=y
@@ -8,22 +10,26 @@ CONFIG_FTRACE=y
CONFIG_FTRACE_SYSCALLS=y
CONFIG_FUNCTION_GRAPH_RETVAL=y
CONFIG_FUNCTION_PROFILER=y
+CONFIG_FUNCTION_TRACER=y
CONFIG_HIST_TRIGGERS=y
CONFIG_IRQSOFF_TRACER=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KPROBES=y
CONFIG_KPROBE_EVENTS=y
+CONFIG_MAGIC_SYSRQ=y
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_PREEMPTIRQ_DELAY_TEST=m
CONFIG_PREEMPT_TRACER=y
CONFIG_PROBE_EVENTS_BTF_ARGS=y
+CONFIG_RESERVE_MEM=y
CONFIG_SAMPLES=y
CONFIG_SAMPLE_FTRACE_DIRECT=m
CONFIG_SAMPLE_TRACE_EVENTS=m
CONFIG_SAMPLE_TRACE_PRINTK=m
CONFIG_SCHED_TRACER=y
CONFIG_STACK_TRACER=y
+CONFIG_SYNTH_EVENTS=y
CONFIG_TRACER_SNAPSHOT=y
CONFIG_UPROBES=y
CONFIG_UPROBE_EVENTS=y
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v3 2/4] selftests/ftrace: Add boot-time tracing testcases
2026-08-12 0:43 [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu (Google)
2026-08-12 0:43 ` [PATCH v3 1/4] selftests/ftrace: Add generic boot " Masami Hiramatsu (Google)
@ 2026-08-12 0:43 ` Masami Hiramatsu (Google)
2026-08-12 0:43 ` [PATCH v3 3/4] selftests/ftrace: Add kernel cmdline " Masami Hiramatsu (Google)
` (2 subsequent siblings)
4 siblings, 0 replies; 7+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-12 0:43 UTC (permalink / raw)
To: Steven Rostedt, Masami Hiramatsu, Shuah Khan
Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel,
linux-kselftest
From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Add test cases for boot-time tracing configuration via bootconfig
(see Documentation/trace/boottime-trace.rst).
These test cases verify:
- 01-kprobe: Dynamic kprobe events via bootconfig
- 02-synth: Synthetic events via bootconfig
- 03-eprobe: Event probes (eprobes) via bootconfig
- 04-fprobe: Function probes (fprobes) via bootconfig
- 05-tprobe: Tracepoint probes via bootconfig
- 06-instance: Custom trace instances via bootconfig
Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
.../ftrace/boottime/bootconfigs/01-kprobe.bconf | 4 +++
.../ftrace/boottime/bootconfigs/02-synth.bconf | 4 +++
.../ftrace/boottime/bootconfigs/03-eprobe.bconf | 4 +++
.../ftrace/boottime/bootconfigs/04-fprobe.bconf | 4 +++
.../ftrace/boottime/bootconfigs/05-tprobe.bconf | 4 +++
.../ftrace/boottime/bootconfigs/06-instance.bconf | 5 +++
.../selftests/ftrace/boottime/tests/01-kprobe.sh | 25 +++++++++++++++++
.../selftests/ftrace/boottime/tests/02-synth.sh | 25 +++++++++++++++++
.../selftests/ftrace/boottime/tests/03-eprobe.sh | 25 +++++++++++++++++
.../selftests/ftrace/boottime/tests/04-fprobe.sh | 25 +++++++++++++++++
.../selftests/ftrace/boottime/tests/05-tprobe.sh | 25 +++++++++++++++++
.../selftests/ftrace/boottime/tests/06-instance.sh | 30 ++++++++++++++++++++
12 files changed, 180 insertions(+)
create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
new file mode 100644
index 000000000000..13d30d1e51a6
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
@@ -0,0 +1,4 @@
+ftrace.event.kprobes.vfs_read {
+ probes = "vfs_read $arg1"
+ enable
+}
diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
new file mode 100644
index 000000000000..b1f37713f33c
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
@@ -0,0 +1,4 @@
+ftrace.event.synthetic.boot_lat {
+ fields = "unsigned long id", "u64 delta"
+ enable
+}
diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
new file mode 100644
index 000000000000..c1a8138e605d
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
@@ -0,0 +1,4 @@
+ftrace.event.eprobes.ep_read {
+ probes = "sched/sched_switch"
+ enable
+}
diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
new file mode 100644
index 000000000000..82ae2ac0629f
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
@@ -0,0 +1,4 @@
+ftrace.event.fprobes.fp_read {
+ probes = "vfs_read"
+ enable
+}
diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
new file mode 100644
index 000000000000..02a2803c770a
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
@@ -0,0 +1,4 @@
+ftrace.event.tracepoints.tp_sched {
+ probes = "sched_switch"
+ enable
+}
diff --git a/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf b/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
new file mode 100644
index 000000000000..3fdb6717afe2
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
@@ -0,0 +1,5 @@
+ftrace.instance.foo {
+ event.sched.sched_switch {
+ enable
+ }
+}
diff --git a/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
new file mode 100644
index 000000000000..6ed7caca4c5f
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check kprobe bootconfig settings on tracefs
+TRACEDIR="/sys/kernel/tracing"
+
+if [ -f /proc/bootconfig ] && grep -q "dump_bconf" /proc/cmdline 2>/dev/null; then
+ echo "=== /proc/bootconfig ==="
+ cat /proc/bootconfig
+ echo "========================"
+fi
+
+if [ ! -d "$TRACEDIR/events/kprobes/vfs_read" ]; then
+ echo "FAIL: kprobe event kprobes/vfs_read does not exist"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/events/kprobes/vfs_read/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: kprobe event kprobes/vfs_read is not enabled ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: 01-kprobe"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh b/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
new file mode 100644
index 000000000000..745c328dde15
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check synthetic event bootconfig settings on tracefs
+TRACEDIR="/sys/kernel/tracing"
+
+if [ -f /proc/bootconfig ] && grep -q "dump_bconf" /proc/cmdline 2>/dev/null; then
+ echo "=== /proc/bootconfig ==="
+ cat /proc/bootconfig
+ echo "========================"
+fi
+
+if [ ! -d "$TRACEDIR/events/synthetic/boot_lat" ]; then
+ echo "FAIL: synthetic event synthetic/boot_lat does not exist"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/events/synthetic/boot_lat/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: synthetic event synthetic/boot_lat is not enabled ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: 02-synth"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
new file mode 100644
index 000000000000..9b3b7ab23c69
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check eprobe event bootconfig settings on tracefs
+TRACEDIR="/sys/kernel/tracing"
+
+if [ -f /proc/bootconfig ] && grep -q "dump_bconf" /proc/cmdline 2>/dev/null; then
+ echo "=== /proc/bootconfig ==="
+ cat /proc/bootconfig
+ echo "========================"
+fi
+
+if [ ! -d "$TRACEDIR/events/eprobes/ep_read" ]; then
+ echo "FAIL: eprobe event eprobes/ep_read does not exist"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/events/eprobes/ep_read/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: eprobe event eprobes/ep_read is not enabled ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: 03-eprobe"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
new file mode 100644
index 000000000000..27e090c28a4b
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check fprobe event bootconfig settings on tracefs
+TRACEDIR="/sys/kernel/tracing"
+
+if [ -f /proc/bootconfig ] && grep -q "dump_bconf" /proc/cmdline 2>/dev/null; then
+ echo "=== /proc/bootconfig ==="
+ cat /proc/bootconfig
+ echo "========================"
+fi
+
+if [ ! -d "$TRACEDIR/events/fprobes/fp_read" ]; then
+ echo "FAIL: fprobe event fprobes/fp_read does not exist"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/events/fprobes/fp_read/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: fprobe event fprobes/fp_read is not enabled ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: 04-fprobe"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh b/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
new file mode 100644
index 000000000000..810d34055f94
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check tracepoint probe event bootconfig settings on tracefs
+TRACEDIR="/sys/kernel/tracing"
+
+if [ -f /proc/bootconfig ] && grep -q "dump_bconf" /proc/cmdline 2>/dev/null; then
+ echo "=== /proc/bootconfig ==="
+ cat /proc/bootconfig
+ echo "========================"
+fi
+
+if [ ! -d "$TRACEDIR/events/tracepoints/tp_sched" ]; then
+ echo "FAIL: tracepoint probe event tracepoints/tp_sched does not exist"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/events/tracepoints/tp_sched/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: tracepoint probe event tracepoints/tp_sched is not enabled ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: 05-tprobe"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh b/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
new file mode 100644
index 000000000000..f6e8519912e4
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check instance bootconfig settings on tracefs
+TRACEDIR="/sys/kernel/tracing"
+
+if [ -f /proc/bootconfig ] && grep -q "dump_bconf" /proc/cmdline 2>/dev/null; then
+ echo "=== /proc/bootconfig ==="
+ cat /proc/bootconfig
+ echo "========================"
+fi
+
+if [ ! -d "$TRACEDIR/instances/foo" ]; then
+ echo "FAIL: trace instance foo does not exist"
+ exit 1
+fi
+
+if [ ! -d "$TRACEDIR/instances/foo/events/sched/sched_switch" ]; then
+ echo "FAIL: event sched_switch does not exist in instance foo"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/instances/foo/events/sched/sched_switch/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: event sched_switch is not enabled in instance foo ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: 06-instance"
+exit 0
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v3 3/4] selftests/ftrace: Add kernel cmdline tracing testcases
2026-08-12 0:43 [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu (Google)
2026-08-12 0:43 ` [PATCH v3 1/4] selftests/ftrace: Add generic boot " Masami Hiramatsu (Google)
2026-08-12 0:43 ` [PATCH v3 2/4] selftests/ftrace: Add boot-time tracing testcases Masami Hiramatsu (Google)
@ 2026-08-12 0:43 ` Masami Hiramatsu (Google)
2026-08-12 0:44 ` [PATCH v3 4/4] selftests/ftrace: Add persistent ring buffer testcases Masami Hiramatsu (Google)
2026-08-14 16:05 ` [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu
4 siblings, 0 replies; 7+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-12 0:43 UTC (permalink / raw)
To: Steven Rostedt, Masami Hiramatsu, Shuah Khan
Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel,
linux-kselftest
From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Add test cases for kernel command-line tracing options. It verifies
various parameters like trace_buf_size and trace_options by reading
the output of tracing files in sysfs.
Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
Changes in v3:
- Add '# APPLETS: awk' header to cmdline-03-trace-buf-size.sh to request
awk applet in initramfs.
Changes in v2:
- Fix buffer_size_kb parsing in cmdline-03-trace-buf-size.sh to handle
unexpanded buffer string output '1 (expanded: 2048)'.
- Use grep -qw in cmdline-04-trace-options.sh to match word options
and avoid matching disabled 'no<option>' entries.
---
.../boottime/cmdlines/cmdline-01-ftrace.cmdline | 1 +
.../cmdlines/cmdline-02-trace-event.cmdline | 1 +
.../cmdlines/cmdline-03-trace-buf-size.cmdline | 1 +
.../cmdlines/cmdline-04-trace-options.cmdline | 1 +
.../cmdlines/cmdline-05-trace-clock.cmdline | 1 +
.../cmdlines/cmdline-06-trace-instance.cmdline | 1 +
.../ftrace/boottime/tests/cmdline-01-ftrace.sh | 19 +++++++++++++
.../boottime/tests/cmdline-02-trace-event.sh | 26 ++++++++++++++++++
.../boottime/tests/cmdline-03-trace-buf-size.sh | 29 ++++++++++++++++++++
.../boottime/tests/cmdline-04-trace-options.sh | 23 ++++++++++++++++
.../boottime/tests/cmdline-05-trace-clock.sh | 19 +++++++++++++
.../boottime/tests/cmdline-06-trace-instance.sh | 24 +++++++++++++++++
12 files changed, 146 insertions(+)
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-01-ftrace.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-02-trace-event.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-03-trace-buf-size.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-04-trace-options.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-05-trace-clock.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-06-trace-instance.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-01-ftrace.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-02-trace-event.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-03-trace-buf-size.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-04-trace-options.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-05-trace-clock.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-06-trace-instance.sh
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-01-ftrace.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-01-ftrace.cmdline
new file mode 100644
index 000000000000..4f6fc54240c8
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-01-ftrace.cmdline
@@ -0,0 +1 @@
+ftrace=function
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-02-trace-event.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-02-trace-event.cmdline
new file mode 100644
index 000000000000..66bcd29b14cb
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-02-trace-event.cmdline
@@ -0,0 +1 @@
+trace_event=sched:sched_switch,kmem:kmalloc
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-03-trace-buf-size.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-03-trace-buf-size.cmdline
new file mode 100644
index 000000000000..e5d1c4a8ca89
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-03-trace-buf-size.cmdline
@@ -0,0 +1 @@
+trace_buf_size=2048K
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-04-trace-options.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-04-trace-options.cmdline
new file mode 100644
index 000000000000..51d82f8e948d
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-04-trace-options.cmdline
@@ -0,0 +1 @@
+trace_options=sym-addr,verbose
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-05-trace-clock.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-05-trace-clock.cmdline
new file mode 100644
index 000000000000..f72a4ac808a3
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-05-trace-clock.cmdline
@@ -0,0 +1 @@
+trace_clock=global
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-06-trace-instance.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-06-trace-instance.cmdline
new file mode 100644
index 000000000000..9618e3e2b88b
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-06-trace-instance.cmdline
@@ -0,0 +1 @@
+trace_instance=bar,sched:sched_switch
diff --git a/tools/testing/selftests/ftrace/boottime/tests/cmdline-01-ftrace.sh b/tools/testing/selftests/ftrace/boottime/tests/cmdline-01-ftrace.sh
new file mode 100644
index 000000000000..23a0b15f2dd3
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/cmdline-01-ftrace.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check ftrace= kernel command-line tracer setting
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -f "$TRACEDIR/current_tracer" ]; then
+ echo "FAIL: current_tracer does not exist"
+ exit 1
+fi
+
+read -r TRACER _ < "$TRACEDIR/current_tracer"
+if [ "$TRACER" != "function" ]; then
+ echo "FAIL: current_tracer is '$TRACER', expected 'function'"
+ exit 1
+fi
+
+echo "PASS: cmdline-01-ftrace"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/cmdline-02-trace-event.sh b/tools/testing/selftests/ftrace/boottime/tests/cmdline-02-trace-event.sh
new file mode 100644
index 000000000000..b793907c48cd
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/cmdline-02-trace-event.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check trace_event= kernel command-line setting
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -d "$TRACEDIR/events/sched/sched_switch" ]; then
+ echo "FAIL: event sched:sched_switch does not exist"
+ exit 1
+fi
+
+if [ ! -d "$TRACEDIR/events/kmem/kmalloc" ]; then
+ echo "FAIL: event kmem:kmalloc does not exist"
+ exit 1
+fi
+
+ENABLE1=$(cat "$TRACEDIR/events/sched/sched_switch/enable")
+ENABLE2=$(cat "$TRACEDIR/events/kmem/kmalloc/enable")
+
+if [ "$ENABLE1" != "1" ] || [ "$ENABLE2" != "1" ]; then
+ echo "FAIL: events not enabled (sched_switch=$ENABLE1, kmalloc=$ENABLE2)"
+ exit 1
+fi
+
+echo "PASS: cmdline-02-trace-event"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/cmdline-03-trace-buf-size.sh b/tools/testing/selftests/ftrace/boottime/tests/cmdline-03-trace-buf-size.sh
new file mode 100644
index 000000000000..4b936f84d4d7
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/cmdline-03-trace-buf-size.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# APPLETS: awk
+# Check trace_buf_size= kernel command-line setting
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -f "$TRACEDIR/buffer_size_kb" ]; then
+ echo "FAIL: buffer_size_kb does not exist"
+ exit 1
+fi
+
+BUF_RAW=$(cat "$TRACEDIR/buffer_size_kb")
+case "$BUF_RAW" in
+ *"expanded:"*)
+ BUFSIZE=$(echo "$BUF_RAW" | sed -n 's/.*expanded: *\([0-9]*\).*/\1/p')
+ ;;
+ *)
+ BUFSIZE=$(echo "$BUF_RAW" | awk '{print $1}')
+ ;;
+esac
+
+if [ -z "$BUFSIZE" ] || [ "$BUFSIZE" -lt 2048 ]; then
+ echo "FAIL: buffer_size_kb is '$BUF_RAW', expected >= 2048"
+ exit 1
+fi
+
+echo "PASS: cmdline-03-trace-buf-size"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/cmdline-04-trace-options.sh b/tools/testing/selftests/ftrace/boottime/tests/cmdline-04-trace-options.sh
new file mode 100644
index 000000000000..53a65b55f7a7
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/cmdline-04-trace-options.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check trace_options= kernel command-line setting
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -f "$TRACEDIR/trace_options" ]; then
+ echo "FAIL: trace_options file does not exist"
+ exit 1
+fi
+
+if ! grep -qw "sym-addr" "$TRACEDIR/trace_options"; then
+ echo "FAIL: sym-addr option is not set in trace_options"
+ exit 1
+fi
+
+if ! grep -qw "verbose" "$TRACEDIR/trace_options"; then
+ echo "FAIL: verbose option is not set in trace_options"
+ exit 1
+fi
+
+echo "PASS: cmdline-04-trace-options"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/cmdline-05-trace-clock.sh b/tools/testing/selftests/ftrace/boottime/tests/cmdline-05-trace-clock.sh
new file mode 100644
index 000000000000..d6de9f6e2090
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/cmdline-05-trace-clock.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check trace_clock= kernel command-line setting
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -f "$TRACEDIR/trace_clock" ]; then
+ echo "FAIL: trace_clock file does not exist"
+ exit 1
+fi
+
+if ! grep -q '\[global\]' "$TRACEDIR/trace_clock"; then
+ CLOCK=$(cat "$TRACEDIR/trace_clock")
+ echo "FAIL: trace_clock is not set to global ($CLOCK)"
+ exit 1
+fi
+
+echo "PASS: cmdline-05-trace-clock"
+exit 0
diff --git a/tools/testing/selftests/ftrace/boottime/tests/cmdline-06-trace-instance.sh b/tools/testing/selftests/ftrace/boottime/tests/cmdline-06-trace-instance.sh
new file mode 100644
index 000000000000..aae7f0a86d81
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/cmdline-06-trace-instance.sh
@@ -0,0 +1,24 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check trace_instance= kernel command-line setting
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -d "$TRACEDIR/instances/bar" ]; then
+ echo "FAIL: trace instance bar does not exist"
+ exit 1
+fi
+
+if [ ! -d "$TRACEDIR/instances/bar/events/sched/sched_switch" ]; then
+ echo "FAIL: event sched_switch does not exist in instance bar"
+ exit 1
+fi
+
+ENABLE=$(cat "$TRACEDIR/instances/bar/events/sched/sched_switch/enable")
+if [ "$ENABLE" != "1" ]; then
+ echo "FAIL: event sched_switch is not enabled in instance bar ($ENABLE)"
+ exit 1
+fi
+
+echo "PASS: cmdline-06-trace-instance"
+exit 0
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v3 4/4] selftests/ftrace: Add persistent ring buffer testcases
2026-08-12 0:43 [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu (Google)
` (2 preceding siblings ...)
2026-08-12 0:43 ` [PATCH v3 3/4] selftests/ftrace: Add kernel cmdline " Masami Hiramatsu (Google)
@ 2026-08-12 0:44 ` Masami Hiramatsu (Google)
2026-08-14 16:05 ` [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu
4 siblings, 0 replies; 7+ messages in thread
From: Masami Hiramatsu (Google) @ 2026-08-12 0:44 UTC (permalink / raw)
To: Steven Rostedt, Masami Hiramatsu, Shuah Khan
Cc: Mathieu Desnoyers, linux-kernel, linux-trace-kernel,
linux-kselftest
From: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Add test cases for persistent ring buffer (reserve_mem= combined
with trace_instance=) and backup instance (trace_instance=backup=boot_map).
These test cases verify:
- persistent-01-reserve-mem: Memory reservation via reserve_mem=
and trace_instance=boot_map@trace. Verifies trace data retention in
the boot_map instance across guest crash/reboot via sysrq-trigger.
- persistent-02-backup-instance: Backup instance creation via
trace_instance=backup=boot_map. Verifies that previous boot trace
log is preserved in the backup instance on the subsequent boot.
These test cases specify '# REBOOT: 1' to enable multi-boot guest
crash/reboot testing with doubled QEMU timeout.
Assisted-by: Antigravity:gemini-3.6-flash
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
---
Changes in v2:
- Increase reserve_mem alignment to 32M (reserve_mem=12M:32M:trace) to
ensure stable physical memory placement across KASLR reboots.
---
.../cmdlines/persistent-01-reserve-mem.cmdline | 1 +
.../cmdlines/persistent-02-backup-instance.cmdline | 1 +
.../boottime/tests/persistent-01-reserve-mem.sh | 28 ++++++++++++++
.../tests/persistent-02-backup-instance.sh | 40 ++++++++++++++++++++
4 files changed, 70 insertions(+)
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/persistent-01-reserve-mem.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/persistent-02-backup-instance.cmdline
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/persistent-01-reserve-mem.sh
create mode 100644 tools/testing/selftests/ftrace/boottime/tests/persistent-02-backup-instance.sh
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/persistent-01-reserve-mem.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/persistent-01-reserve-mem.cmdline
new file mode 100644
index 000000000000..c69eeb27deb6
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/persistent-01-reserve-mem.cmdline
@@ -0,0 +1 @@
+reserve_mem=12M:32M:trace trace_instance=boot_map@trace
diff --git a/tools/testing/selftests/ftrace/boottime/cmdlines/persistent-02-backup-instance.cmdline b/tools/testing/selftests/ftrace/boottime/cmdlines/persistent-02-backup-instance.cmdline
new file mode 100644
index 000000000000..43217c986ca1
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/cmdlines/persistent-02-backup-instance.cmdline
@@ -0,0 +1 @@
+reserve_mem=12M:32M:trace trace_instance=boot_map@trace trace_instance=backup=boot_map
diff --git a/tools/testing/selftests/ftrace/boottime/tests/persistent-01-reserve-mem.sh b/tools/testing/selftests/ftrace/boottime/tests/persistent-01-reserve-mem.sh
new file mode 100644
index 000000000000..49abaf518481
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/persistent-01-reserve-mem.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check persistent ring buffer across guest crash/reboot
+# REBOOT: 1
+TRACEDIR="/sys/kernel/tracing"
+
+if [ ! -f "$TRACEDIR/instances/boot_map/trace" ]; then
+ echo "FAIL: persistent trace instance boot_map/trace file missing"
+ exit 1
+fi
+
+# Check if Boot 1 marker was already written
+if grep -q "BOOT1_MARKER" "$TRACEDIR/instances/boot_map/trace" 2>/dev/null; then
+ # Second boot: verify persistent ring buffer content from first boot
+ echo "PASS: persistent-01-reserve-mem"
+ exit 0
+fi
+
+# First boot: write marker to persistent buffer and trigger kernel crash/reboot
+echo "BOOT1_MARKER" > "$TRACEDIR/instances/boot_map/trace_marker"
+sync
+
+# Trigger reboot to restart into second boot
+echo b > /proc/sysrq-trigger 2>/dev/null || echo c > /proc/sysrq-trigger 2>/dev/null || true
+sleep 5
+echo "FAIL: reboot trigger failed on first boot"
+exit 1
diff --git a/tools/testing/selftests/ftrace/boottime/tests/persistent-02-backup-instance.sh b/tools/testing/selftests/ftrace/boottime/tests/persistent-02-backup-instance.sh
new file mode 100644
index 000000000000..0b2a2f03ce4f
--- /dev/null
+++ b/tools/testing/selftests/ftrace/boottime/tests/persistent-02-backup-instance.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2026, Google LLC.
+# Check persistent backup instance across guest crash/reboot
+# REBOOT: 1
+TRACEDIR="/sys/kernel/tracing"
+
+# Ensure both boot_map/trace and backup/trace files exist
+if [ ! -f "$TRACEDIR/instances/boot_map/trace" ]; then
+ echo "FAIL: boot_map/trace file missing"
+ exit 1
+fi
+
+if [ ! -f "$TRACEDIR/instances/backup/trace" ]; then
+ echo "FAIL: backup/trace file missing"
+ exit 1
+fi
+
+# Check if BOOT1_MARKER is in boot_map/trace (indicates second boot)
+if grep -q "BOOT1_MARKER" "$TRACEDIR/instances/boot_map/trace" 2>/dev/null; then
+ # Second boot: verify BOOT1_MARKER was copied into backup/trace from Boot 1
+ if grep -q "BOOT1_MARKER" "$TRACEDIR/instances/backup/trace" 2>/dev/null; then
+ echo "PASS: persistent-02-backup-instance"
+ exit 0
+ else
+ echo "FAIL: BOOT1_MARKER found in boot_map/trace" \
+ "but missing from backup/trace on second boot"
+ exit 1
+ fi
+fi
+
+# First boot: write BOOT1_MARKER to boot_map and reboot via sysrq-trigger
+echo "BOOT1_MARKER" > "$TRACEDIR/instances/boot_map/trace_marker"
+sync
+
+# Trigger reboot to restart into second boot
+echo b > /proc/sysrq-trigger 2>/dev/null || echo c > /proc/sysrq-trigger 2>/dev/null || true
+sleep 5
+echo "FAIL: reboot trigger failed on first boot"
+exit 1
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework
2026-08-12 0:43 [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu (Google)
` (3 preceding siblings ...)
2026-08-12 0:44 ` [PATCH v3 4/4] selftests/ftrace: Add persistent ring buffer testcases Masami Hiramatsu (Google)
@ 2026-08-14 16:05 ` Masami Hiramatsu
2026-08-14 17:36 ` Steven Rostedt
4 siblings, 1 reply; 7+ messages in thread
From: Masami Hiramatsu @ 2026-08-14 16:05 UTC (permalink / raw)
To: Masami Hiramatsu (Google), Steven Rostedt
Cc: Steven Rostedt, Shuah Khan, Mathieu Desnoyers, linux-kernel,
linux-trace-kernel, linux-kselftest
Hi Steve,
Would you have any comment on this? I would like to pick this to probes/for-next
for ensuring boottime tracing works correctly.
Thank you,
On Wed, 12 Aug 2026 09:43:28 +0900
"Masami Hiramatsu (Google)" <mhiramat@kernel.org> wrote:
> Hi,
>
> This is the v3 series of the boottime tracing test framework to selftests/ftrace.
> This test builds initramfs from busybox binary and test scripts, and run it on
> QEMU with modified cmdline and bootconfig.
>
> The previous version is here:
>
> https://lore.kernel.org/all/178646245730.428104.4400499381224001727.stgit@devnote2/
>
> In this version, I fixed some issues pointed by Sashiko[1] and add "# APPLETS:"
> line support for test script. See below changelog for details.
>
> [1] https://sashiko.dev/#/patchset/178646245730.428104.4400499381224001727.stgit%40devnote2
>
> Changes in v3:
> [1/4]
> - Require file command and check kernel binary architecture via file -bL
> instead of matching kernel path string in run_boottime_test.sh.
> - Use 'cp -L' when copying BUSYBOX into initramfs to dereference
> symbolic links.
> - Use 'ln -sf' when creating BusyBox applet symlinks in initramfs.
> - Add support for '# APPLETS: <applets>' header in test scripts to
> dynamically create BusyBox applet symlinks in initramfs.
> - Update boottime test README to document file command dependency and
> '# APPLETS:' header syntax.
> [3/4]
> - Add '# APPLETS: awk' header to cmdline-03-trace-buf-size.sh to request
> awk applet in initramfs.
>
> Changes in v2:
> [1/4]
> - Add top-level boottime-ktap wrapper script and include it in
> TEST_PROGS in Makefile.
> - Define BUSYBOX_APPLETS as a global array variable including sleep
> and sed.
> - Require timeout tool in run_boottime_test.sh and README, and always
> invoke QEMU under timeout command to prevent infinite execution loops.
> - Add fallback sleep loop safeguard (sleep 100 || break) in guest
> init script.
> - Support multi-line .qemuopts files using read -r -d '' -a qemu_args.
> [3/4]
> - Fix buffer_size_kb parsing in cmdline-03-trace-buf-size.sh to handle
> unexpanded buffer string output '1 (expanded: 2048)'.
> - Use grep -qw in cmdline-04-trace-options.sh to match word options
> and avoid matching disabled 'no<option>' entries.
> [4/4]
> - Increase reserve_mem alignment to 32M (reserve_mem=12M:32M:trace) to
> ensure stable physical memory placement across KASLR reboots.
>
> The new run_boottime_test.sh can run tests not only for boottime trace
> but also other kernel cmdline tracing options, including persistent
> ring buffer and its backup.
>
> Overview
> --------
> The test runner (`run_boottime_test.sh`) constructs a lightweight initramfs
> with busybox and a tracefs checker script from `tests/`, attaches optional
> bootconfigs from `bootconfigs/` using the `bootconfig` tool, applies optional
> command-line parameters from `cmdlines/`, boots the target kernel image under
> QEMU, and reports results according to TAP version 13 format.
>
> Here is an example usage of the test.
> -----
> $ ./tools/testing/selftests/ftrace/boottime/run_boottime_test.sh -k ${BUILD_PATH}/arch/x86/boot/bzImage
> TAP version 13
> 1..14
> ok 1 01-kprobe
> ok 2 02-synth
> ok 3 03-eprobe
> ok 4 04-fprobe
> ok 5 05-tprobe
> ok 6 06-instance
> ok 7 cmdline-01-ftrace
> ok 8 cmdline-02-trace-event
> ok 9 cmdline-03-trace-buf-size
> ok 10 cmdline-04-trace-options
> ok 11 cmdline-05-trace-clock
> ok 12 cmdline-06-trace-instance
> ok 13 persistent-01-reserve-mem
> ok 14 persistent-02-backup-instance
> # Totals: pass:14 fail:0 xfail:0 xpass:0 skip:0 error:0
> -----
>
> Note that this requires QEMU, busybox and some other tools to run, see README
> for more information. If those tools are not installed, this test will be
> skipped.
>
> Other discussion
> ----------------
> BTW, I found other similar shell scripts under kselftest for other subsystems.
> I think we can make an integrated (standard) QEMU test framework in the
> kselftest common directory and reuse it.
> Also, maybe we can reconsider using ktest.pl to run these tests.
>
>
> Thanks,
>
> ---
> base-commit: 29a86c5e6361caffa7e75e891169e813f82ff688
>
> Masami Hiramatsu (Google) (4):
> selftests/ftrace: Add generic boot tracing test framework
> selftests/ftrace: Add boot-time tracing testcases
> selftests/ftrace: Add kernel cmdline tracing testcases
> selftests/ftrace: Add persistent ring buffer testcases
>
>
> tools/testing/selftests/ftrace/Makefile | 4
> tools/testing/selftests/ftrace/boottime-ktap | 6
> tools/testing/selftests/ftrace/boottime/Makefile | 10
> tools/testing/selftests/ftrace/boottime/README | 74 ++++
> .../ftrace/boottime/bootconfigs/01-kprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/02-synth.bconf | 4
> .../ftrace/boottime/bootconfigs/03-eprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/04-fprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/05-tprobe.bconf | 4
> .../ftrace/boottime/bootconfigs/06-instance.bconf | 5
> .../boottime/cmdlines/cmdline-01-ftrace.cmdline | 1
> .../cmdlines/cmdline-02-trace-event.cmdline | 1
> .../cmdlines/cmdline-03-trace-buf-size.cmdline | 1
> .../cmdlines/cmdline-04-trace-options.cmdline | 1
> .../cmdlines/cmdline-05-trace-clock.cmdline | 1
> .../cmdlines/cmdline-06-trace-instance.cmdline | 1
> .../cmdlines/persistent-01-reserve-mem.cmdline | 1
> .../cmdlines/persistent-02-backup-instance.cmdline | 1
> .../selftests/ftrace/boottime/run_boottime_test.sh | 403 ++++++++++++++++++++
> .../selftests/ftrace/boottime/tests/01-kprobe.sh | 25 +
> .../selftests/ftrace/boottime/tests/02-synth.sh | 25 +
> .../selftests/ftrace/boottime/tests/03-eprobe.sh | 25 +
> .../selftests/ftrace/boottime/tests/04-fprobe.sh | 25 +
> .../selftests/ftrace/boottime/tests/05-tprobe.sh | 25 +
> .../selftests/ftrace/boottime/tests/06-instance.sh | 30 +
> .../ftrace/boottime/tests/cmdline-01-ftrace.sh | 19 +
> .../boottime/tests/cmdline-02-trace-event.sh | 26 +
> .../boottime/tests/cmdline-03-trace-buf-size.sh | 29 +
> .../boottime/tests/cmdline-04-trace-options.sh | 23 +
> .../boottime/tests/cmdline-05-trace-clock.sh | 19 +
> .../boottime/tests/cmdline-06-trace-instance.sh | 24 +
> .../boottime/tests/persistent-01-reserve-mem.sh | 28 +
> .../tests/persistent-02-backup-instance.sh | 40 ++
> tools/testing/selftests/ftrace/config | 6
> 34 files changed, 897 insertions(+), 2 deletions(-)
> create mode 100755 tools/testing/selftests/ftrace/boottime-ktap
> create mode 100644 tools/testing/selftests/ftrace/boottime/Makefile
> create mode 100644 tools/testing/selftests/ftrace/boottime/README
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/01-kprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/02-synth.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/03-eprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/04-fprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/05-tprobe.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/bootconfigs/06-instance.bconf
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-01-ftrace.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-02-trace-event.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-03-trace-buf-size.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-04-trace-options.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-05-trace-clock.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/cmdline-06-trace-instance.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/persistent-01-reserve-mem.cmdline
> create mode 100644 tools/testing/selftests/ftrace/boottime/cmdlines/persistent-02-backup-instance.cmdline
> create mode 100755 tools/testing/selftests/ftrace/boottime/run_boottime_test.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/01-kprobe.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/02-synth.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/03-eprobe.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/04-fprobe.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/05-tprobe.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/06-instance.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-01-ftrace.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-02-trace-event.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-03-trace-buf-size.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-04-trace-options.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-05-trace-clock.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/cmdline-06-trace-instance.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/persistent-01-reserve-mem.sh
> create mode 100644 tools/testing/selftests/ftrace/boottime/tests/persistent-02-backup-instance.sh
>
> --
> Masami Hiramatsu (Google) <mhiramat@kernel.org>
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework
2026-08-14 16:05 ` [PATCH v3 0/4] selftests/ftrace: Add a boottime tracing test framework Masami Hiramatsu
@ 2026-08-14 17:36 ` Steven Rostedt
0 siblings, 0 replies; 7+ messages in thread
From: Steven Rostedt @ 2026-08-14 17:36 UTC (permalink / raw)
To: Masami Hiramatsu (Google)
Cc: Shuah Khan, Mathieu Desnoyers, linux-kernel, linux-trace-kernel,
linux-kselftest
On Sat, 15 Aug 2026 01:05:24 +0900
Masami Hiramatsu (Google) <mhiramat@kernel.org> wrote:
> Hi Steve,
>
> Would you have any comment on this? I would like to pick this to probes/for-next
> for ensuring boottime tracing works correctly.
Hmm, it's a bit too close to the merge window for a good review of it. I'll
be traveling next week and I'm trying to get all my pull requests ready
before then. You sent v1 on Monday and v3 on Tuesday. Sounds to me a bit
rushed when you have 3 versions during the -rc7 release week.
This isn't a trivial feature. I think we should let it settle during the
next merge cycle to do it properly.
-- Steve
^ permalink raw reply [flat|nested] 7+ messages in thread