ARM: 6206/1: CONFIG_FORCE_MAX_ZONEORDER update for SH-Mobile ARM (c1b2d970) · Commits · 戴 / test

Allow SH-Mobile ARM users to adjust FORCE_MAX_ZONEORDER. The Kconfig entry is taken from SH and non-4K page size stuff has been trimmed away. For now only SH-Mobile ARM is allowed to change this variable, SA1111 configs are kept at "9" and the rest at "11". CONFIG_FORCE_MAX_ZONEORDER lets the user tweak the maximum amount of physically contiguous memory that can be allocated by the kernel. Signed-off-by:

Magnus Damm <damm@opensource.se> Signed-off-by:

Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

+16 −5

Original line number	Diff line number	Diff line
		@@ -1031,11 +1031,6 @@ endmenu

		source "arch/arm/common/Kconfig"

		config FORCE_MAX_ZONEORDER
		int
		depends on SA1111
		default "9"

		menu "Bus support"

		config ARM_AMBA
		@@ -1304,6 +1299,22 @@ config SPARSE_IRQ

		source "mm/Kconfig"

		config FORCE_MAX_ZONEORDER
		int "Maximum zone order" if ARCH_SHMOBILE
		range 11 64 if ARCH_SHMOBILE
		default "9" if SA1111
		default "11"
		help
		The kernel memory allocator divides physically contiguous memory
		blocks into "zones", where each zone is a power of two number of
		pages. This option selects the largest power of two that the kernel
		keeps in the memory allocator. If you need to allocate very large
		blocks of physically contiguous memory, then you may need to
		increase this value.

		This config option is actually maximum order plus one. For example,
		a value of 11 means that the largest free memory block is 2^10 pages.

		config LEDS
		bool "Timer and CPU usage LEDs"
		depends on ARCH_CDB89712 \|\| ARCH_EBSA110 \|\| \

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