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Clarify.
author
Ben Pfaff
<blp@cs.stanford.edu>
Tue, 23 Nov 2004 01:45:21 +0000
(
01:45
+0000)
committer
Ben Pfaff
<blp@cs.stanford.edu>
Tue, 23 Nov 2004 01:45:21 +0000
(
01:45
+0000)
doc/vm.texi
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diff --git
a/doc/vm.texi
b/doc/vm.texi
index 72bd6b9470f1c367ca40f302f20ef2a4e28ec20d..ef2eb80050c77efc5b08cdc5da6f6696e35aed2d 100644
(file)
--- a/
doc/vm.texi
+++ b/
doc/vm.texi
@@
-278,6
+278,12
@@
Some way of translating from physical page frames back to virtual page
frames, so that when you evict a physical page from its frame, you can
invalidate its translation(s).
frames, so that when you evict a physical page from its frame, you can
invalidate its translation(s).
+It is possible to do this translation without adding a new data
+structure, by modifying the code in @file{userprog/pagedir.c}. However,
+if you do that you'll need to carefully study and understand section 3.7
+in @bibref{IA32-v3}, and in practice it is probably easier to add a new
+data structure.
+
@item
Some way of finding a page on disk if it is not in memory. You won't
need this data structure until problem 3-2, but planning ahead is a
@item
Some way of finding a page on disk if it is not in memory. You won't
need this data structure until problem 3-2, but planning ahead is a