Rewrite palloc code so that it only touches the first 4 MB of RAM.

[pintos-anon] / src / threads / palloc.h

diff --git a/src/threads/palloc.h b/src/threads/palloc.h
index 45e0f42b21e2e8261235df0e6936aa5e19d1b1f7..44cfb0efb406c35d2046ebb75fe57cae0b1fa31f 100644 (file)
--- a/src/threads/palloc.h
+++ b/src/threads/palloc.h
@@ -3,6 +3,7 @@
 
 #include <stddef.h>
 
+/* How to allocate pages. */
 enum palloc_flags
   {
     PAL_ASSERT = 001,           /* Panic on failure. */
@@ -10,6 +11,9 @@ enum palloc_flags
     PAL_USER = 004              /* User page. */
   };
 
+/* Maximum number of pages to put in user pool. */
+extern size_t max_user_pages;
+
 void palloc_init (void);
 void *palloc_get_page (enum palloc_flags);
 void *palloc_get_multiple (enum palloc_flags, size_t page_cnt);