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如题:Force the highmem memory zone to have an exact size of n bytes. This will work even on boxes that have no highmem zones by default. It can also reduce the size of the highmem zone for machines with a lot of memory.
Override the default number of hash buckets for the kernel's inode cache. Recommended only for kernel experts.
Cause the kernel to ignore all physical memory greater than or equal to the physical address n.
Set the specific ammount of memory used by the kernel. When used with the memmap= option, physical address space collisions can be avoided. Without the memmap= option, this option could cause PCI devices to be placed at addresses that belong to unused RAM. n specifies the amount of memory to force and is measured in units of kilobytes (K), megabytes (M), or gigabytes (G).
Enable or disable the kernel's ability to map sections of memory as nonexecutable. By default, the mapping is enabled (on). |
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