What is the method of memory management in the Linux operating system?

The methods of memory management in Linux system mainly include the following aspects:

1. Memory allocation: In Linux systems, the allocation and release of kernel memory is managed through memory allocators such as SLUB, SLAB, kmalloc, and the allocation of user space memory is implemented through C library functions like malloc and free.
2. Page swapping: Linux systems utilize page swapping technology to move infrequently used memory pages to the disk in order to free up memory space. When these pages are needed again, they are retrieved from the disk back into memory.
3. Page reclamation: Linux systems use a page reclaim mechanism to recover memory pages that are no longer in use. This process primarily relies on the Least Recently Used (LRU) algorithm to determine which pages need to be reclaimed.
4. Memory mapping is a technique used by the Linux system to map disk files into memory in order to access files, reducing IO costs and improving file access speed.

Overall, the Linux system manages memory resources through these methods to improve system performance and stability.