Within a driver, the mmap function is implemented through the remap_pfn_range kernel function, which provides a linear mapping of device memory into a user's address space.
在一个驱动程序中，mmap函数通过remap _ pfn_range内核函数实现，它提供设备内存到用户地址空间的线性映射。
A 64-bit application can directly access 4 exabytes of virtual memory, and the Intel Itanium processor provides a contiguous linear address space.
位的应用程序可以直接访问4eb的虚拟内存，Intel Itanium处理器提供了连续的线性地址空间。
In order to solve the high order linear system of equations, we have used the frontal method with high accuracy and considerable economy of main memory space.
用节省内存空间而精度又高的波前法来求解此特大型方程组。
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