Fix the bug of active_table_swap() wrongly force unlock in pg fault handler

crate/memory/src/swap/fifo.rs

@@ -23,6 +23,8 @@ impl SwapManager for FifoSwapManager {
             .position(|ref x| x.get_virtaddr() == addr && x.get_token() == token)
             .expect("address not found");
         self.deque.remove(id);
+        //info!("SwapManager remove token finished: {:x?} vaddr: {:x?}", token, addr);
+        
     }
 
     fn pop<T, S>(&mut self, _: &mut T, _: &mut S) -> Option<Frame>

kernel/src/memory.rs

@@ -108,7 +108,7 @@ impl Drop for KernelStack {
 */
 pub fn page_fault_handler(addr: usize) -> bool {
     info!("start handling swap in/out page fault");
-    unsafe { ACTIVE_TABLE_SWAP.force_unlock(); }
+    //unsafe { ACTIVE_TABLE_SWAP.force_unlock(); }
 
     info!("active page table token in pg fault is {:x?}", ActivePageTable::token());
     let mmset_record = memory_set_record();