diff options
| author | Dave Kleikamp <dave.kleikamp@oracle.com> | 2016-10-28 10:12:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-11-18 11:16:58 -0800 |
| commit | c88c545bf3202ca2cdb45df93eb40e3bcdbb3742 (patch) | |
| tree | 432eda20e70b4d1af107fbd15c8a851aace7ead8 /arch/sparc/Kconfig | |
| parent | 87a349f9cc0908bc0cfac0c9ece3179f650ae95a (diff) | |
| download | linux-c88c545bf3202ca2cdb45df93eb40e3bcdbb3742.tar.gz | |
sparc64: Add FORCE_MAX_ZONEORDER and default to 13
This change allows ATU (new IOMMU) in SPARC systems to request
large (32M) contiguous memory during boot for creating IOTSB backing
store.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/Kconfig')
| -rw-r--r-- | arch/sparc/Kconfig | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index b23c76b42d6e..5202eb4ba2db 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -89,6 +89,10 @@ config ARCH_DEFCONFIG config ARCH_PROC_KCORE_TEXT def_bool y +config ARCH_ATU + bool + default y if SPARC64 + config IOMMU_HELPER bool default y if SPARC64 @@ -304,6 +308,20 @@ config ARCH_SPARSEMEM_ENABLE config ARCH_SPARSEMEM_DEFAULT def_bool y if SPARC64 +config FORCE_MAX_ZONEORDER + int "Maximum zone order" + default "13" + 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 13 means that the largest free memory block is 2^12 pages. + source "mm/Kconfig" if SPARC64 |