Question

linux memmap是什么时候建立的

Answer 1

mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory

Amount of memory to be used when the kernel is not able

to see the whole system memory or for test.

[IA-32] Use together with memmap= to avoid physical

address space collisions. Without memmap= PCI devices

could be placed at addresses belonging to unused RAM.

mem=nopentium [BUGS=IA-32] Disable usage of 4MB pages for kernel

memory.

memmap=exactmap [KNL,IA-32] Enable setting of an exact

E820 memory map, as specified by the user.

Such memmap=exactmap lines can be constructed based on

BIOS output or other requirements. See the memmap=nn@ss

option description.

memmap=nn[KMG]@ss[KMG]

[KNL] Force usage of a specific region of memory

Region of memory to be used, from ss to ss+nn.