1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/kalloc.c b/kernel/kalloc.c
index 0699e7e..c2fdb86 100644
--- a/kernel/kalloc.c
+++ b/kernel/kalloc.c
@@ -80,3 +80,17 @@ kalloc(void)
     memset((char*)r, 5, PGSIZE); // fill with junk
   return (void*)r;
 }
+
+int
+get_freemem(void)
+{
+  int n;
+  struct run *r;
+
+  acquire(&kmem.lock);
+  for (n = 0, r = kmem.freelist; r; r = r->next)
+    n++;
+  release(&kmem.lock);
+
+  return n * PGSIZE;
+}