UML - Shrink kernel stacks

PATCH In review Jeff Dike 1 participant 1 message May 9, 2007 User-mode Linux (UML)

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Jeff Dike

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2007-05-09 20:32 UTC #0 lore raw

PATCH 6/6 UML - Shrink kernel stacks

Make kernel stacks be 1 page on i386 and 2 pages on x86_64. These matche the host values.

Signed-off-by Jeff Dike <[email protected]>

 arch/um/Kconfig   |    2 +-
 arch/um/defconfig |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

arch/um/Kconfig +2 -1

Index: linux-2.6.21-mm/arch/um/Kconfig
===================================================================
@@ -277,7 +277,8 @@ config HIGHMEM
 
 config KERNEL_STACK_ORDER
 	int "Kernel stack size order"
-	default 2
+	default 1 if 64BIT
+	default 0 if !64BIT
 	help
 	This option determines the size of UML kernel stacks.  They will
 	be 1 << order pages.  The default is OK unless you're running Valgrind

arch/um/defconfig +1 -1

Index: linux-2.6.21-mm/arch/um/defconfig
===================================================================
@@ -86,7 +86,7 @@ CONFIG_MCONSOLE=y
 # CONFIG_MAGIC_SYSRQ is not set
 CONFIG_NEST_LEVEL=0
 # CONFIG_HIGHMEM is not set
-CONFIG_KERNEL_STACK_ORDER=2
+CONFIG_KERNEL_STACK_ORDER=0
 CONFIG_UML_REAL_TIME_CLOCK=y
 
 #

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