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Commit c9bace7c authored by David Daney's avatar David Daney Committed by Ralf Baechle
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MIPS: Add a CONFIG_FORCE_MAX_ZONEORDER Kconfig option. 



For huge page support with base page size of 16K or 32K, we have to
increase the MAX_ORDER so that huge pages can be allocated.

[Ralf: I don't think a user should have to configure obscure constants like
this but for the time being this will have to suffice.]

Signed-off-by: default avatarDavid Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1685/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 82b89152

arch/mips/Kconfig

+22 −0
Original line number Diff line number Diff line
@@ -1666,6 +1666,28 @@ config PAGE_SIZE_64KB 


endchoice



config FORCE_MAX_ZONEORDER

	int "Maximum zone order"

	range 13 64 if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_32KB

	default "13" if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_32KB

	range 12 64 if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_16KB

	default "12" if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_16KB

	range 11 64

	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.



	  The page size is not necessarily 4KB.  Keep this in mind

	  when choosing a value for this option.



config BOARD_SCACHE

	bool