path: root/arch/xtensa
diff options
authorMax Filippov <jcmvbkbc@gmail.com>2015-11-02 17:51:02 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2015-11-03 17:19:37 +0300
commita9df9338c1a32e7cdc8c6c6fa7c73f0a63a1ca56 (patch)
tree75d949020909e03886b31035931bb75e28d782ca /arch/xtensa
parent6c33dc33cefbd16b288f73024a10f438236a5124 (diff)
xtensa: add FORCE_MAX_ZONEORDER to Kconfig
Make maximal memory allocation order configurable, so that drivers could allocate huge buffers when they need to. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 3d35867c61f1..82044f732323 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -398,6 +398,20 @@ config SIMDISK1_FILENAME
source "mm/Kconfig"
+ int "Maximum zone order"
+ 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.
source "drivers/pcmcia/Kconfig"
source "drivers/pci/hotplug/Kconfig"