1. A data access processing method, comprising: copying a kernel code and a global descriptor table on a memory of each of nodes respectively; making base addresses of kernel code segments on the respective nodes in the global descriptor table respectively point to linear addresses of the kernel code corresponding to the respective nodes based on a virtual address of the kernel code; and recording a mapping relation between the linear addresses of the kernel code corresponding to the respective nodes and physical addresses of the respective nodes in a kernel page table respectively, to enable a process to access the kernel code locally in the respective nodes.