masayuki2009 commented on PR #8951:
URL: https://github.com/apache/nuttx/pull/8951#issuecomment-1495585959
>It is strange. I just rebuilt the code and can't reproduce the crash. I
will do more experiments.
@pkarashchenko
I tried this PR with
```
--- a/boards/arm/cxd56xx/spresense/configs/smp/defconfig
+++ b/boards/arm/cxd56xx/spresense/configs/smp/defconfig
@@ -40,12 +40,14 @@ CONFIG_NSH_ARCHINIT=y
CONFIG_NSH_BUILTIN_APPS=y
CONFIG_NSH_READLINE=y
CONFIG_PREALLOC_TIMERS=4
+CONFIG_PRIORITY_INHERITANCE=y
CONFIG_RAM_SIZE=1572864
CONFIG_RAM_START=0x0d000000
CONFIG_READLINE_CMD_HISTORY=y
CONFIG_RR_INTERVAL=200
CONFIG_RTC=y
CONFIG_RTC_DRIVER=y
+CONFIG_SEM_PREALLOCHOLDERS=0
CONFIG_SMP=y
CONFIG_SMP_NCPUS=2
CONFIG_SPI=y
$ arm-none-eabi-gcc --version
arm-none-eabi-gcc (Arm GNU Toolchain 12.2.MPACBTI-Rel1 (Build
arm-12-mpacbti.34)) 12.2.1 20230214
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```
And the ostest passed without any errors.
```
NuttShell (NSH) NuttX-3.6.1
nsh> uname -a
NuttX 3.6.1 7b6a424c6d-dirty Apr 4 2023 17:35:14 arm spresense
nsh> ps
PID GROUP CPU PRI POLICY TYPE NPX STATE EVENT SIGMASK
STACK COMMAND
0 0 0 0 FIFO Kthread N-- Assigned 0000000000000000
001000 CPU0 IDLE
1 1 1 0 FIFO Kthread N-- Running 0000000000000000
001000 CPU1 IDLE
3 3 --- 200 RR Task --- Waiting MQ empty 0000000000000000
000976 cxd56_pm_task
4 4 0 100 RR Task --- Running 0000000000000000
002000 spresense_main
nsh> free
total used free largest nused nfree
Umem: 1392840 15744 1377096 1374864 77 3
nsh> ostest
stdio_test: write fd=1
stdio_test: Standard I/O Check: printf
stdio_test: write fd=2
...
user_main: priority inheritance test
priority_inheritance: Started
priority_inheritance: Starting lowpri_thread-1 (of 1) at 1
priority_inheritance: Set lowpri_thread-1 priority to 1
priority_inheritance: Waiting...
lowpri_thread-1: Started
lowpri_thread-1: initial priority: 1
lowpri_thread-1: Waiting for the midle pri task to run
g_middlestate: 0
g_highstate[0]: 0
I still have a count on the semaphore
lowpri_thread-1: Waiting for the midle pri task to run
g_middlestate: 0
g_highstate[0]: 0
I still have a count on the semaphore
priority_inheritance: Starting medpri_thread at 99
priority_inheritance: Set medpri_thread priority to 99
priority_inheritance: Waiting...
medpri_thread: Started ... I won't let go of the CPU!
lowpri_thread-1: Sem count: 0, No. highpri thread: 0
lowpri_thread-1: SUCCESS priority before sem_post: 1
lowpri_thread-1: SUCCESS final priority: 1
lowpri_thread-1: Okay... I'm done!
priority_inheritance: Starting highpri_thread-1 (of 1) at 255
priority_inheritance: Set highpri_thread-1 priority to 255
priority_inheritance: Waiting for highpri_thread-1 to complete
highpri_thread-1: Started
highpri_thread-1: Calling sem_wait()
highpri_thread-1: SUCCESS midpri_thread is still running!
highpri_thread-1: Okay... I'm done!
priority_inheritance: Waiting for medpri_thread to complete
medpri_thread: Okay... I'm done!
priority_inheritance: Waiting for lowpri_thread-1 to complete
priority_inheritance: Restoration Test:
priority_inheritance: Task0 initial priority is:200
priority_inheritance: Task1 initial priority is:210
priority_inheritance: Waiting for Task-0 to complete
priority_inheritance: Task2 initial priority is:220
priority_inheritance: Task0 Started, waiting 0 uS to take count
priority_inheritance: Task1 Started, waiting 10000 uS to take count
priority_inheritance: Task2 Started, waiting 20000 uS to take count
priority_inheritance: Task0 Posted
priority_inheritance: Task0 priority was:200 is:200
priority_inheritance: Waiting for Task-1 to complete
priority_inheritance: Task2 Posted
priority_inheritance: Task2 priority was:220 is:220
priority_inheritance: Task1 Posted
priority_inheritance: Task1 priority was:210 is:210
priority_inheritance: Waiting for Task-2 to complete
priority_inheritance: PASSED Priority were correctly restored.
priority_inheritance: Finished
End of test memory usage:
VARIABLE BEFORE AFTER
======== ======== ========
arena 1540c8 1540c8
ordblks 11 12
mxordblk 143ed8 143ed8
uordblks 8520 a828
fordblks 14bba8 1498a0
user_main: vfork() test
vfork_test: Child 94 ran successfully
Final memory usage:
VARIABLE BEFORE AFTER
======== ======== ========
arena 1540c8 1540c8
ordblks 4 12
mxordblk 14b720 143ed8
uordblks 74e8 c028
fordblks 14cbe0 1480a0
user_main: Exiting
ostest_main: Exiting with status 0
```
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