clean code

Author: loongs-zhang

core/src/scheduler.rs

@@ -227,8 +227,6 @@ impl<'s> Scheduler<'s> {
                     co.syscall(val, syscall, SyscallState::Callback)
                         .expect("change syscall state failed");
                 }
-                //协程在系统调用执行期间被信号抢占，直接放回就绪队列
-                CoroutineState::Syscall((), _, SyscallState::Executing) => {}
                 _ => unreachable!("try_resume unexpect CoroutineState"),
             }
             self.ready.push(co);
@@ -391,23 +389,6 @@ impl<'s> Scheduler<'s> {
                 }
             }
         }
-        // Check for coroutines preempted during syscall execution (SIGURG race).
-        // These have SyscallState::Executing and no syscall_suspend entry,
-        // so they would be stuck in the syscall map forever without this.
-        let executing: Vec<u64> = self
-            .syscall
-            .iter()
-            .filter(|entry| {
-                matches!(
-                    entry.value().state(),
-                    CoroutineState::Syscall((), _, SyscallState::Executing)
-                )
-            })
-            .map(|entry| *entry.key())
-            .collect();
-        for co_id in executing {
-            self.try_resume(co_id);
-        }
         Ok(())
     }