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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 64-bit kernels, so
remove the CONFIG_4KSTACKS option.

Signed-off-by: Christoph Hellwig <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Christoph Hellwig 2010-06-28 14:16:14 +02:00 • committed by Thomas Gleixner
commit dcfa726280
3 changed files with 1 additions and 19 deletions
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9
arch/x86/Kconfig.debug
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@ -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

7
arch/x86/include/asm/module.h
View file

@ -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 */

4
arch/x86/include/asm/page_32_types.h
View file

@ -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