Messages in this thread Patch in this message | | | Date | Mon, 28 Jun 2010 14:16:14 +0200 | From | Christoph Hellwig <> | Subject | [PATCH 2/2] x86: remove CONFIG_4KSTACKS |
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These days 4 kilobytes of stack just aren't enough for reliably operation, and people using lots of threads have long switched to 32-bit kernels, so remove the CONFIG_4KSTACKS option.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Index: linux-2.6/arch/x86/Kconfig.debug =================================================================== --- linux-2.6.orig/arch/x86/Kconfig.debug 2010-06-16 10:24:06.902272433 +0200 +++ linux-2.6/arch/x86/Kconfig.debug 2010-06-16 10:24:11.837068354 +0200 @@ -121,15 +121,6 @@ config DEBUG_NX_TEST and the software setup of this feature. If in doubt, say "N" -config 4KSTACKS - bool "Use 4Kb for kernel stacks instead of 8Kb" - depends on X86_32 - ---help--- - If you say Y here the kernel will use a 4Kb stacksize for the - kernel stack attached to each process/thread. This facilitates - running more threads on a system and also reduces the pressure - on the VM subsystem for higher order allocations. - config DOUBLEFAULT default y bool "Enable doublefault exception handler" if EMBEDDED Index: linux-2.6/arch/x86/include/asm/module.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/module.h 2010-06-16 10:24:06.922004449 +0200 +++ linux-2.6/arch/x86/include/asm/module.h 2010-06-16 10:24:23.255291640 +0200 @@ -60,12 +60,7 @@ #endif #ifdef CONFIG_X86_32 -# ifdef CONFIG_4KSTACKS -# define MODULE_STACKSIZE "4KSTACKS " -# else -# define MODULE_STACKSIZE "" -# endif -# define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY MODULE_STACKSIZE +# define MODULE_ARCH_VERMAGIC MODULE_PROC_FAMILY #endif #endif /* _ASM_X86_MODULE_H */ Index: linux-2.6/arch/x86/include/asm/page_32_types.h =================================================================== --- linux-2.6.orig/arch/x86/include/asm/page_32_types.h 2010-06-16 10:24:06.933273132 +0200 +++ linux-2.6/arch/x86/include/asm/page_32_types.h 2010-06-16 10:24:30.251005496 +0200 @@ -15,11 +15,7 @@ */ #define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) -#ifdef CONFIG_4KSTACKS -#define THREAD_ORDER 0 -#else #define THREAD_ORDER 1 -#endif #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) #define STACKFAULT_STACK 0
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