Add CMA_AGGRESSIVE config that depend on CMA to Linux kernel config. Add CMA_AGGRESSIVE_PHY_MAX, CMA_AGGRESSIVE_FREE_MIN and CMA_AGGRESSIVE_SHRINK that depend on CMA_AGGRESSIVE. If physical memory size (not include CMA memory) in byte less than or equal to CMA_AGGRESSIVE_PHY_MAX, CMA aggressive switch (sysctl vm.cma-aggressive-switch) will be opened. When system boot, this value will set to sysctl "vm.cma-aggressive-free-min". If this value is true, sysctl "vm.cma-aggressive-shrink-switch" will be set to true when Linux boot. Signed-off-by: Hui Zhu <zhuhui@xxxxxxxxxx> --- mm/Kconfig | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/mm/Kconfig b/mm/Kconfig index 1d1ae6b..940f5f3 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -527,6 +527,49 @@ config CMA_AREAS If unsure, leave the default value "7". +config CMA_AGGRESSIVE + bool "CMA aggressive" + depends on CMA + default n + help + Be more aggressive about taking memory from CMA when allocate MOVABLE + page. + Sysctl "vm.cma-aggressive-switch", "vm.cma-aggressive-alloc-max" + and "vm.cma-aggressive-shrink-switch" can control this function. + If unsure, say "n". + +config CMA_AGGRESSIVE_PHY_MAX + hex "Physical memory size in Bytes that auto turn on the CMA aggressive switch" + depends on CMA_AGGRESSIVE + default 0x40000000 + help + If physical memory size (not include CMA memory) in byte less than or + equal to this value, CMA aggressive switch will be opened. + After the Linux boot, sysctl "vm.cma-aggressive-switch" can control + the CMA AGGRESSIVE switch. + +config CMA_AGGRESSIVE_FREE_MIN + int "The minimum free CMA page number that CMA aggressive work" + depends on CMA_AGGRESSIVE + default 500 + help + When system boot, this value will set to sysctl + "vm.cma-aggressive-free-min". + If the number of CMA free pages is small than this sysctl value, + CMA aggressive will not work. + +config CMA_AGGRESSIVE_SHRINK + bool "CMA aggressive shrink" + depends on CMA_AGGRESSIVE + default y + help + If this value is true, sysctl "vm.cma-aggressive-shrink-switch" will + be set to true when Linux boot. + If sysctl "vm.cma-aggressive-shrink-switch" is true and free normal + memory's size is smaller than the size that it want to allocate, + do memory shrink before driver allocate pages from CMA. + If unsure, say "y". + config MEM_SOFT_DIRTY bool "Track memory changes" depends on CHECKPOINT_RESTORE && HAVE_ARCH_SOFT_DIRTY && PROC_FS -- 1.9.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>