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| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-11-02 15:51:02 +0100 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2015-11-03 15:19:37 +0100 |
| commit | a9df9338c1a32e7cdc8c6c6fa7c73f0a63a1ca56 (patch) | |
| tree | 75d949020909e03886b31035931bb75e28d782ca /arch | |
| parent | xtensa: nommu: provide defconfig for de212 on kc705 (diff) | |
| download | linux-a9df9338c1a32e7cdc8c6c6fa7c73f0a63a1ca56.tar.xz linux-a9df9338c1a32e7cdc8c6c6fa7c73f0a63a1ca56.zip | |
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')
| -rw-r--r-- | arch/xtensa/Kconfig | 14 |
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" +config FORCE_MAX_ZONEORDER + 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" |