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authorMike Rapoport (IBM) <rppt@kernel.org>2023-03-24 08:22:30 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-04-19 02:29:46 +0300
commitb2a37fb2b54fd46bfa799268717f558d9e168376 (patch)
tree46d750cbfde3553e6ed920eae711c660b01f2ea7 /arch/sh
parent1e8fed873e7499bab8da05b2006f6a3960796c68 (diff)
downloadlinux-b2a37fb2b54fd46bfa799268717f558d9e168376.tar.xz
sh: reword ARCH_FORCE_MAX_ORDER prompt and help text
The prompt and help text of ARCH_FORCE_MAX_ORDER are not even close to describe this configuration option. Update both to actually describe what this option does. [rppt@kernel.org: tweak ARCH_FORCE_MAX_ORDER's `range'] Link: https://lkml.kernel.org/r/20230325060828.2662773-12-rppt@kernel.org Link: https://lkml.kernel.org/r/20230324052233.2654090-12-rppt@kernel.org Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Zi Yan <ziy@nvidia.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: David Miller <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Rich Felker <dalias@libc.org> Cc: "Russell King (Oracle)" <linux@armlinux.org.uk> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/mm/Kconfig16
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 40271090bd7d..238b2772751e 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -19,7 +19,7 @@ config PAGE_OFFSET
default "0x00000000"
config ARCH_FORCE_MAX_ORDER
- int "Maximum zone order"
+ int "Order of maximal physically contiguous allocations"
range 8 63 if PAGE_SIZE_16KB
default "8" if PAGE_SIZE_16KB
range 6 63 if PAGE_SIZE_64KB
@@ -28,16 +28,18 @@ config ARCH_FORCE_MAX_ORDER
default "13" if !MMU
default "10"
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.
+ The kernel page allocator limits the size of maximal physically
+ contiguous allocations. The limit is called MAX_ORDER and it
+ defines the maximal power of two of number of pages that can be
+ allocated as a single contiguous block. This option allows
+ overriding the default setting when ability to allocate very
+ large blocks of physically contiguous memory is required.
The page size is not necessarily 4KB. Keep this in mind when
choosing a value for this option.
+ Don't change if unsure.
+
config MEMORY_START
hex "Physical memory start address"
default "0x08000000"