how is kernel and user space addressing layed out on HIGHMEM kernels?
if a Linux 2.6.x kernel has these options enabled:
CONFIG_X86_4G=y
CONFIG_X86_SWITCH_PAGETABLES=y
CONFIG_X86_4G_VM_LAYOUT=y
CONFIG_X86_UACCESS_INDIR开发者_运维百科ECT=y
CONFIG_X86_HIGH_ENTRY=y
how does the address layout change?
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