From: Ben Pfaff <blp@cs.stanford.edu>
Date: Fri, 8 Dec 2006 14:52:37 +0000 (+0000)
Subject: Note that struct file, struct dir are per-thread.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9667cc796f96017951f8ac90978846918c184d7;p=pintos-anon

Note that struct file, struct dir are per-thread.
From Godmar Back.
---

diff --git a/doc/filesys.texi b/doc/filesys.texi
index 1605b2d..f245daa 100644
--- a/doc/filesys.texi
+++ b/doc/filesys.texi
@@ -394,6 +394,10 @@ if B's data is all nonzero bytes, A is not allowed to see any zeros.
 Operations on different directories should take place concurrently.
 Operations on the same directory may wait for one another.
 
+Keep in mind that only data shared by multiple threads needs to be
+synchronized.  In the base file system, @struct{file} and @struct{dir}
+are accessed only by a single thread.
+
 @node Project 4 FAQ
 @section FAQ