Deficit based Weighted Round Robin Scheduler

src/context/context.rs

@@ -13,6 +13,7 @@ use crate::{
     context::{
         self, arch,
         file::{FileDescriptor, LockedFileDescription},
+        run_contexts_mut,
     },
     cpu_set::{LogicalCpuId, LogicalCpuSet},
     cpu_stats,
@@ -137,6 +138,10 @@ pub struct Context {
     pub userspace: bool,
     pub being_sigkilled: bool,
     pub fmap_ret: Option<Frame>,
+    /// Priority
+    pub prio: usize,
+    /// Enqueued
+    pub enqueued: bool,
 
     // TODO: id can reappear after wraparound?
     pub owner_proc_id: Option<NonZeroUsize>,
@@ -194,6 +199,8 @@ impl Context {
             files: Arc::new(RwLock::new(FdTbl::new())),
             userspace: false,
             fmap_ret: None,
+            prio: 20,
+            enqueued: false,
             being_sigkilled: false,
             owner_proc_id,