Memory Management in Linux Kernel

Course Curriculum

Chapter 1: Memory Management Part 1

Lecture 1: What is Physical Address Space

Lecture 2: How to view memory map/physical address space in Linux – /proc/iomem

Lecture 3: Running 32-bit Buildroot image in QEMU

Lecture 4: View/Change RAM Size in QEMU – /proc/meminfo, free -m

Lecture 5: Virtual Address Space for 32-bit processors

Lecture 6: Why kernel shares its address space for all processes

Lecture 7: 64-bit Memory Map

Lecture 8: Converting Virtual address to physical address and vice versa

Lecture 9: Pages – PAGE_SIZE macro

Lecture 10: struct page

Lecture 11: Page Fault

Lecture 12: Page Faults when memory is 4 KB

Lecture 13: User space virtual address space

Lecture 14: Kernel Virtual address space – low mem and high mem

Lecture 15: Low Memory

Lecture 16: How can i find out how much is my low mem and high mem

Lecture 17: High Memory

Lecture 18: Memory Allocation Mechanism

Lecture 19: kmalloc and kfree

Lecture 20: Linux Kernel Module example of kmalloc and kfree

Chapter 2: Memory Management Part 2

Lecture 1: Zones

Lecture 2: Buddy System allocator

Lecture 3: Virtual Kernel Memory Layout

Lecture 4: Can i use virt_to_phy to get physical address of kmalloc pointer

Lecture 5: Example of passing various GFP_FLAGS to kmalloc

Lecture 6: Maximum size that can be allocated using kmalloc

Lecture 7: What happens if we don't free memory allocated using kmalloc

Lecture 8: ksize

Lecture 9: kzalloc

Lecture 10: krealloc

Lecture 11: Example to demonstrate kmalloc is contiguous in physical and virtual

Lecture 12: vmalloc

Lecture 13: Maximum size that can be allocated using vmalloc

Lecture 14: vmalloc vs kmalloc

Lecture 15: Maximum size that can be allocated using vmalloc on 32-bit

Lecture 16: Why is VmallocUsed always 0

Lecture 17: Can i use ksize with vmalloc

Lecture 18: Maximum amount of memory that can be allocated using vmalloc

Lecture 19: What happens when i do kmalloc of 0 zero bytes

Lecture 20: What happens when i do vmalloc of 0 bytes

Lecture 21: Kernel Stack

Lecture 22: CONFIG_FRAME_WARN

Lecture 23: check_stack.pl script

Chapter 3: Resources

Lecture 1: Resources