diff options
Diffstat (limited to 'mm/Kconfig')
| -rw-r--r-- | mm/Kconfig | 52 |
1 files changed, 52 insertions, 0 deletions
@@ -370,3 +370,55 @@ config CLEANCACHE in a negligible performance hit. If unsure, say Y to enable cleancache + +config CMA + bool "Contiguous Memory Allocator framework" + # Currently there is only one allocator so force it on + select CMA_BEST_FIT + help + This enables the Contiguous Memory Allocator framework which + allows drivers to allocate big physically-contiguous blocks of + memory for use with hardware components that do not support I/O + map nor scatter-gather. + + If you select this option you will also have to select at least + one allocator algorithm below. + + To make use of CMA you need to specify the regions and + driver->region mapping on command line when booting the kernel. + +config CMA_DEVELOPEMENT + bool "Include CMA developement features" + depends on CMA + help + This lets you enable some developement features of the CMA + freamework. + +config CMA_DEBUG + bool "CMA debug messages" + depends on CMA_DEVELOPEMENT + help + Enable debug messages in CMA code. + +config CMA_SYSFS + bool "CMA SysFS interface support" + depends on CMA_DEVELOPEMENT + help + Enable support for SysFS interface. + +config CMA_CMDLINE + bool "CMA command line parameters support" + depends on CMA_DEVELOPEMENT + help + Enable support for cma, cma.map and cma.asterisk command line + parameters. + +config CMA_BEST_FIT + bool "CMA best-fit allocator" + depends on CMA + help + This is a best-fit algorithm running in O(n log n) time where + n is the number of existing holes (which is never greater then + the number of allocated regions and usually much smaller). It + allocates area from the smallest hole that is big enough for + allocation in question. |