Sleep and Wakeup in xv6 – Missed Wakeup Prevention and Synchronization
Describes sleep/wakeup mechanism for process synchronization in xv6: channels, spinlocks, examples with pipes and wait/exit, missed wakeup prevention.
Locking in xv6
Explains spinlock implementation using xchg instruction, interrupt disabling, ptable.lock across context switching, and critical section protection.
Memory Management of User Processes
Details process memory management in xv6: page table construction, fork memory copying, sbrk heap expansion, and exec system call memory setup.
Virtual Memory and Paging in xv6
Covers virtual addressing, page tables, two-level page table structure, process address space, kernel mappings, memory allocation, and free list management.
Context Switching in xv6
Explains context switching mechanism in xv6: scheduler loop, sched function, context structure, swtch assembly function, and kernel stack management during process switches.