@@ -1,10 +1,11 @@
# SPDX-License-Identifier: GPL-2.0
-config 16KSTACKS
- bool "Use 16Kb for kernel stacks instead of 8Kb"
+config DEBUG_STACKS
+ bool "Use double sized kernel stacks"
help
- If you say Y here the kernel will use a 16Kb stacksize for the
+ If you say Y here the kernel will use a double sized stack for the
kernel stack attached to each process/thread. The default is 8K.
+ (depends on CONFIG_ARC_PAGE_SIZE_16K or CONFIG_ARC_PAGE_SIZE_4K)
This increases the resident kernel footprint and will cause less
threads to run on the system and also increase the pressure
on the VM subsystem for higher order allocations.
@@ -15,7 +15,7 @@
#include <asm/page.h>
-#ifdef CONFIG_16KSTACKS
+#ifdef CONFIG_DEBUG_STACKS
#define THREAD_SIZE_ORDER 1
#else
#define THREAD_SIZE_ORDER 0
Rename 16KSTACKS to DEBUG_STACKS. arch/arc/Kconfig.debug says that the default stack size is 8KB and it will become 16KB stack if 16KSTACKS is set. However, the stack size is based on PAGE_SIZE, and it is configurable by CONFIG_ARC_PAGE_SIZE_16K or CONFIG_ARC_PAGE_SIZE_4K. See arch/arc/include/uapi/asm/page.h: /* PAGE_SHIFT determines the page size */ \#if defined(CONFIG_ARC_PAGE_SIZE_16K) \#define PAGE_SHIFT 14 \#elif defined(CONFIG_ARC_PAGE_SIZE_4K) \#define PAGE_SHIFT 12 \#else \#define PAGE_SHIFT 13 \#endif See arch/arc/include/asm/thread_info.h: \#ifdef CONFIG_DEBUG_STACKS \#define THREAD_SIZE_ORDER 1 \#else \#define THREAD_SIZE_ORDER 0 \#endif \#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) \#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER) To make CONFIG_16KSTACKS less confusing, rename it to DEBUG_STACKS (as it is defined in Kconfig.debug) and modify the Kconfig description. No functional changes intended. Signed-off-by: Min-Hua Chen <minhuadotchen@gmail.com> --- arch/arc/Kconfig.debug | 7 ++++--- arch/arc/include/asm/thread_info.h | 2 +- 2 files changed, 5 insertions(+), 4 deletions(-)