Reference to threads/exception.c should be to userprog/exception.c.

[pintos-anon] / doc / vm.texi

diff --git a/doc/vm.texi b/doc/vm.texi
index 25135f067efb66cee2aa2016a9ed5e5ea9e64e9f..31a8f1ea54a8f3b81131334dcfb53d8e156b2413 100644 (file)
--- a/doc/vm.texi
+++ b/doc/vm.texi
@@ -260,7 +260,7 @@ page fault might only indicate that the page must be brought in from a
 file or swap.  You will have to implement a more sophisticated page
 fault handler to handle these cases.  Your page fault handler, which you
 should implement by modifying @func{page_fault} in
-@file{threads/exception.c}, needs to do roughly the following:
+@file{userprog/exception.c}, needs to do roughly the following:
 
 @enumerate 1
 @item
@@ -714,6 +714,12 @@ process.  If you carefully designed your data structures,
 sharing of read-only pages should not make this part significantly
 harder.
 
+@item How do we resume a process after we have handled a page fault?
+
+Returning from @func{page_fault} resumes the current user process
+(@pxref{Internal Interrupt Handling}).
+It will then retry the instruction to which the instruction pointer points.
+
 @item Does the virtual memory system need to support data segment growth?
 
 No.  The size of the data segment is determined by the linker.  We still