Added CONFIG_USERMAIN_STACKSIZE

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1227 42af7a65-404d-4744-a932-0658087f49c3

configs/README.txt

@@ -369,7 +369,13 @@ defconfig -- This is a configuration file similar to the Linux
 		CONFIG_BOOT_FROM_FLASH - Some configurations support XIP
 		  operation from FLASH.
 		CONFIG_STACK_POINTER - The initial stack pointer
-		CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+		CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+		  This is the thread that (1) performs the inital boot of the system up
+		  to the point where user_start() is spawned, and (2) there after is the
+		  IDLE thread that executes only when there is no other thread ready to
+		  run.
+		CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+		  for the main user thread that begins at the user_start() entry point.
 		CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 		CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 		CONFIG_HEAP_BASE - The beginning of the heap

configs/c5471evm/defconfig

@@ -373,7 +373,13 @@ CONFIG_NET_C5471_BASET10=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -383,6 +389,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/c5471evm/dhcpconfig

@@ -373,7 +373,13 @@ CONFIG_NET_C5471_BASET10=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -383,6 +389,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/c5471evm/netconfig

@@ -373,7 +373,13 @@ CONFIG_NET_C5471_BASET10=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -383,6 +389,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/c5471evm/nshconfig

@@ -373,7 +373,13 @@ CONFIG_NET_C5471_BASET10=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -383,6 +389,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/ez80f910200kitg/ostest/defconfig

@@ -345,7 +345,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -354,6 +360,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=256
+CONFIG_USERMAIN_STACKSIZE=256
 CONFIG_PTHREAD_STACK_MIN=128
 CONFIG_PTHREAD_STACK_DEFAULT=256
 CONFIG_HEAP_SIZE=

configs/m68332evb/defconfig

@@ -323,7 +323,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 #   operation from FLASH.
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -332,6 +338,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/mcu123-lpc214x/nsh/defconfig

@@ -554,7 +554,13 @@ CONFIG_EXAMPLES_NSH_MMCSDMINOR=0
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -564,6 +570,7 @@ CONFIG_BOOT_FROM_FLASH=y
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_HEAP_BASE=

configs/mcu123-lpc214x/ostest/defconfig

@@ -549,7 +549,13 @@ CONFIG_EXAMPLES_NSH_MMCSDMINOR=0
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -559,6 +565,7 @@ CONFIG_BOOT_FROM_FLASH=y
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_HEAP_BASE=

configs/mcu123-lpc214x/usbserial/defconfig

@@ -566,7 +566,13 @@ CONFIG_EXAMPLES_USBSERIAL_ONLYBIG=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -576,6 +582,7 @@ CONFIG_BOOT_FROM_FLASH=y
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_HEAP_BASE=

configs/mcu123-lpc214x/usbstorage/defconfig

@@ -609,7 +609,13 @@ CONFIG_EXAMPLES_USBSTRG_TRACEINTERRUPTS=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -619,6 +625,7 @@ CONFIG_BOOT_FROM_FLASH=y
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_HEAP_BASE=

configs/ntosd-dm320/nettest/defconfig

@@ -485,7 +485,13 @@ CONFIG_DM9X_ETRANS=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -495,6 +501,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/ntosd-dm320/nsh/defconfig

@@ -547,7 +547,13 @@ CONFIG_DM9X_ETRANS=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -557,6 +563,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/ntosd-dm320/ostest/defconfig

@@ -479,7 +479,13 @@ CONFIG_DM9X_ETRANS=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -489,6 +495,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/ntosd-dm320/udp/defconfig

@@ -493,7 +493,13 @@ CONFIG_DM9X_ETRANS=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -503,6 +509,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/ntosd-dm320/uip/defconfig

@@ -485,7 +485,13 @@ CONFIG_DM9X_ETRANS=n
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -495,6 +501,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_BASE=

configs/olimex-strp711/ostest/defconfig

@@ -616,7 +616,13 @@ CONFIG_EXAMPLES_NSH_MMCSDMINOR=0
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -626,6 +632,7 @@ CONFIG_BOOT_FROM_FLASH=y
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=2048
+CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_HEAP_BASE=

configs/pjrc-8051/defconfig

@@ -321,7 +321,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -330,6 +336,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=y
 CONFIG_IDLETHREAD_STACKSIZE=
+CONFIG_USERMAIN_STACKSIZE=
 CONFIG_PTHREAD_STACK_MIN=
 CONFIG_PTHREAD_STACK_DEFAULT=
 CONFIG_HEAP_BASE=

configs/sim/mount/defconfig

@@ -329,7 +329,13 @@ CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -337,7 +343,8 @@ CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 #
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
-CONFIG_IDLETHREAD_STACKSIZE=0x00001000
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_HEAP_BASE=

configs/sim/nettest/defconfig

@@ -328,7 +328,13 @@ CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -336,7 +342,8 @@ CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 #
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
-CONFIG_IDLETHREAD_STACKSIZE=0x00001000
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_HEAP_BASE=

configs/sim/nsh/defconfig

@@ -372,7 +372,13 @@ CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -380,7 +386,8 @@ CONFIG_EXAMPLES_MOUNT_DEVNAME="/dev/ram0"
 #
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
-CONFIG_IDLETHREAD_STACKSIZE=0x00001000
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_HEAP_BASE=

configs/sim/ostest/defconfig

@@ -323,7 +323,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -331,7 +337,8 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 #
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
-CONFIG_IDLETHREAD_STACKSIZE=0x00001000
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_HEAP_BASE=

configs/sim/pashello/defconfig

@@ -317,7 +317,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -325,7 +331,8 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 #
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
-CONFIG_IDLETHREAD_STACKSIZE=0x00001000
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_HEAP_BASE=

configs/us7032evb1/nsh/defconfig

@@ -545,7 +545,13 @@ CONFIG_EXAMPLES_NSH_MMCSDMINOR=0
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -555,6 +561,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_BASE=

configs/us7032evb1/ostest/defconfig

@@ -545,7 +545,13 @@ CONFIG_EXAMPLES_NSH_MMCSDMINOR=0
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer (arm7tdmi only)
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -555,6 +561,7 @@ CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_STACK_POINTER=
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_BASE=

configs/xtrs/nsh/defconfig

@@ -360,7 +360,13 @@ CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -369,6 +375,7 @@ CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_SIZE=

configs/xtrs/ostest/defconfig

@@ -317,7 +317,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -326,6 +332,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_SIZE=

configs/xtrs/pashello/defconfig

@@ -317,7 +317,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -326,6 +332,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_SIZE=

configs/z16f2800100zcog/ostest/defconfig

@@ -343,7 +343,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -352,6 +358,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_SIZE=

configs/z16f2800100zcog/pashello/defconfig

@@ -343,7 +343,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -352,6 +358,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_USERMAIN_STACKSIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_SIZE=

configs/z80sim/nsh/defconfig

@@ -350,7 +350,13 @@ CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -359,6 +365,7 @@ CONFIG_EXAMPLES_NSH_FATMOUNTPT=/tmp
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_SIZE=

configs/z80sim/ostest/defconfig

@@ -307,7 +307,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -316,6 +322,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_SIZE=

configs/z80sim/pashello/defconfig

@@ -307,7 +307,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -316,6 +322,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=1024
+CONFIG_USERMAIN_STACKSIZE=1024
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=1024
 CONFIG_HEAP_SIZE=

configs/z8encore000zco/ostest/defconfig

@@ -346,7 +346,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -355,6 +361,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=256
+CONFIG_USERMAIN_STACKSIZE=256
 CONFIG_PTHREAD_STACK_MIN=128
 CONFIG_PTHREAD_STACK_DEFAULT=256
 CONFIG_HEAP_SIZE=

configs/z8f64200100kit/ostest/defconfig

@@ -346,7 +346,13 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 # CONFIG_CUSTOM_STACK - The up_ implementation will handle
 #   all stack operations outside of the nuttx model.
 # CONFIG_STACK_POINTER - The initial stack pointer
-# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack
+# CONFIG_IDLETHREAD_STACKSIZE - The size of the initial stack.
+#  This is the thread that (1) performs the inital boot of the system up
+#  to the point where user_start() is spawned, and (2) there after is the
+#  IDLE thread that executes only when there is no other thread ready to
+#  run.
+# CONFIG_USERMAIN_STACKSIZE - The size of the stack to allocate
+#  for the main user thread that begins at the user_start() entry point.
 # CONFIG_PTHREAD_STACK_MIN - Minimum pthread stack size
 # CONFIG_PTHREAD_STACK_DEFAULT - Default pthread stack size
 # CONFIG_HEAP_BASE - The beginning of the heap
@@ -355,6 +361,7 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
 CONFIG_IDLETHREAD_STACKSIZE=256
+CONFIG_USERMAIN_STACKSIZE=256
 CONFIG_PTHREAD_STACK_MIN=128
 CONFIG_PTHREAD_STACK_DEFAULT=256
 CONFIG_HEAP_SIZE=