[BUG] smp配置下，使用spin_lock系统卡死，动不了了 #16868
Description
Description / Steps to reproduce the issue
详细步骤如下：
./tools/configure.sh -a ./vendor/boss/app/boss1-app qemu-armv7a:smp
make menuconfig
qemu-system-arm -cpu cortex-a7 -smp 4 -nographic -machine virt,virtualization=off,gic-version=2 -net none -chardev stdio,id=con,mux=on -serial chardev:con -mon chardev=con,mode=readline -kernel ./nuttx
发现系统不能启动，错误信息如下：
[CPU0] psci_detect: Detected PSCI v0.2
[CPU0] nx_start: Entry
[CPU0] uart_register: Registering /dev/console
[CPU0] uart_register: Registering /dev/ttyS1
[CPU0] work_start_highpri: Starting high-priority kernel worker thread(s)
[CPU0] nxtask_activate: hpwork pid=4,TCB=0x40130318
[CPU0] nxtask_activate: AppBringUp pid=5,TCB=0x401313f0
[CPU3] nx_idle_trampoline: CPU3: Beginning Idle Loop
[CPU2] nx_idle_trampoline: CPU2: Beginning Idle Loop
[CPU1] nx_idle_trampoline: CPU1: Beginning Idle Loop
[CPU0] nx_start_application: Starting init thread
[CPU0] task_spawn: name=nsh_main entry=0x4010cfec file_actions=0 attr=0x4013248c argv=0x40132488
[CPU0] nxtask_activate: nsh_main pid=6,TCB=0x401324f0
[CPU1] qemu-system-arm: terminating on signal 2
添加的配置如下：
make savedefconfig
make -f tools/Makefile.host
./tools/cmpconfig defconfig ./boards/arm/qemu/qemu-armv7a/configs/smp/defconfig
file1: CONFIG_BOARD_LATE_INITIALIZE=y
file2:
file1: CONFIG_DEBUG_SCHED=y
file2:
file1: CONFIG_DEBUG_SCHED_INFO=y
file2:
file1:
file2: CONFIG_EXAMPLES_HELLO=y
file1:
file2: CONFIG_TESTING_GETPRIME=y
file1:
file2: CONFIG_TESTING_OSTEST=y
另外我想让syslog打印信息完成，添加了新的patch，patch如下：
git diff
diff --git a/libs/libc/syslog/lib_syslog.c b/libs/libc/syslog/lib_syslog.c
index 5cdb73c145..0cc1667ede 100644
--- a/libs/libc/syslog/lib_syslog.c
+++ b/libs/libc/syslog/lib_syslog.c
@@ -91,14 +91,21 @@ void vsyslog(int priority, FAR const IPTR char *fmt, va_list ap)
- None.
****************************************************************************/
+#include <nuttx/spinlock.h>
+static volatile spinlock_t g_syslog_lock = SP_UNLOCKED;
void syslog(int priority, FAR const IPTR char *fmt, ...)
{
va_list ap;
+#ifdef CONFIG_SPINLOCK
-
spin_lock(&g_syslog_lock);
+#endif
/* Let vsyslog do the work */va_start(ap, fmt);
vsyslog(priority, fmt, ap);
va_end(ap);
+#ifdef CONFIG_SPINLOCK -
spin_unlock(&g_syslog_lock);
+#endif
}
========================================================================
切换到非smp配置后，执行如下命令不会出现卡死现象：
make menuconfig
make savedefconfig
./tools/cmpconfig defconfig ./boards/arm/qemu/qemu-armv7a/configs/smp/defconfig
file1: CONFIG_BOARD_LATE_INITIALIZE=y
file2:
file1: CONFIG_DEBUG_SCHED=y
file2:
file1: CONFIG_DEBUG_SCHED_INFO=y
file2:
file1:
file2: CONFIG_EXAMPLES_HELLO=y
file1:
file2: CONFIG_SMP=y
file1: CONFIG_SPINLOCK=y
file2:
file1:
file2: CONFIG_TESTING_GETPRIME=y
file1:
file2: CONFIG_TESTING_OSTEST=y
make nuttx -j4
执行qemu
qemu-system-arm -cpu cortex-a7 -nographic -machine virt,virtualization=off,gic-version=2 -net none -chardev stdio,id=con,mux=on -serial chardev:con -mon chardev=con,mode=readline -kernel ./nuttx
正常回显：
psci_detect: Detected PSCI v0.2
nx_start: Entry
uart_register: Registering /dev/console
uart_register: Registering /dev/ttyS1
work_start_highpri: Starting high-priority kernel worker thread(s)
nxtask_activate: hpwork pid=1,TCB=0x40129310
nxtask_activate: AppBringUp pid=2,TCB=0x4012a3e0
nx_start_application: Starting init thread
task_spawn: name=nsh_main entry=0x4010adc4 file_actions=0 attr=0x4012b474 argv=0x4012b470
nxtask_activate: nsh_main pid=3,TCB=0x4012b4d8
nxtask_exit: AppBringUp pid=2,TCB=0x4012a3e0
lib_cxx_initialize: _sinit: 0x40121000 _einit: 0x40121000
NuttShell (NSH)
nsh> nx_start: CPU0: Beginning Idle Loop
nsh>
nsh>
nsh> qemu-system-arm: terminating on signal 2
On which OS does this issue occur?
[OS: Linux]
What is the version of your OS?
Linux DESKTOP-BNU9SN9 6.6.87.2-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Thu Jun 5 18:30:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
NuttX Version
master, ba3a55b
Issue Architecture
[Arch: arm]
Issue Area
[Area: Kernel]
Host information
no
Verification
- I have verified before submitting the report.