Memory Management in Linux Kernel

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Aggiornare: 16th Oct 2020: Added Notes/Examples used in the course

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• Physical Address space of processor and how to view it in Linux

• Virtual Address space of processor

• Kernel and User space virtual address space

• Pages and Page Fault

• How to convert virtual address into physical address and the format specifiers used to print

• Low Memory and High Memory

• Memory Allocation Mechanism – Buddy Allocator

• Zones – /proc/buddyinfo

• Dynamic Memory Allocation in Linux Kernel

• Various flags used in kmalloc – GFP_KERNEL, GFP_ATOMIC, GFP_DMA

• Differences between kmalloc and vmalloc

• What happens when you pass 0 in kmalloc and vmalloc

• Kernel Stack

API’s covered in this course:

• virt_to_phys

• phys_to_virt

• kmalloc

• kfree

• krealloc

• ksize

• vmalloc

• vfree

Commands used in this course:

• qemu-system-x86