Remove old code

Signed-off-by: Richard Qin <richard.qin.x@gmail.com>

1 files changed, 0 insertions, 37 deletions

diff --git a/docs/dev/dev_memory.md b/docs/dev/dev_memory.md
deleted file mode 100644
index f05e336..0000000
--- a/docs/dev/dev_memory.md
+++ /dev/null
@@ -1,37 +0,0 @@
-# Dev log 
-## **1. Process Management:** 
-The core architecture has been upgraded from a simple single queue to a Per-CPU scheduler, supporting multi-core concurrency. 
-
-* Process lifecycle: A complete process state machine has been implemented, including UNUSED, RUNNABLE, RUNNING, SLEEPING, and ZOMBIE states. 
-
-* Core operations: 
-    * fork(): process cloning, supporting COW (copy-on-write) isolation of memory space between parent and child processes. 
-    * exit(): process termination and resource cleanup. 
-    * wait(): parent process waits for child process to exit. 
-    * sleep()/wakeup(): channel-based sleep and wakeup mechanism. 
-
-* Scheduling algorithm: 
-    * O(1) priority scheduling has been implemented (supporting 4 priority queues). 
-
-    * Per-CPU RunQueue: each CPU has its own independent run queue. 
-
-    * Supports Work Stealing: idle CPUs can fetch tasks from other CPUs’ queues. 
-
-## **2. Memory Management:** 
-A complete virtual and physical memory management system has been implemented. 
-
-* Physical Memory (PMM): Implements the Buddy System, supporting memory allocation and deallocation in $2^n$ pages. 
-
-* Virtual Memory (VM): Based on RISC-V Sv39 paging mode. Provides secure data copying from user space to kernel space (copyin). 
-
-* COW (Copy-On-Write): During fork, only page table entries are copied and pages are set to read-only; writes trigger page faults for physical copy, greatly improving process creation efficiency. 
-
-* Kernel heap: Implements a Slab Allocator, providing efficient allocation of small objects (such as struct Proc). 
-
-## **3. Synchronization:**
-
-* Spinlock: Used to protect very short critical sections (e.g., scheduler lock, PMM lock), supports disabling interrupts to prevent deadlocks. 
-
-* Mutex (sleeping lock): Used for long critical sections (e.g., file I/O), allowing sleep while holding the lock. 
-
-* Lock Handoff: Implements a complex lock handoff mechanism in the scheduler to ensure atomicity of context switches. 
\ No newline at end of file