From: Ben Pfaff <blp@cs.stanford.edu>
Date: Thu, 16 Oct 2008 22:49:48 +0000 (+0000)
Subject: Always make the scratch disk an even multiple of a cylinder in size.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=commitdiff_plain;h=8349a4cbeec56e4b497d98064ce51aba80c1f258

Always make the scratch disk an even multiple of a cylinder in size.

The pintos script tried to do so before but "print" and "syswrite"
are buffered differently and interfere with one another.

Thanks to Karan Misra <kmisra@stanford.edu> for pointing out the
problem and confirming the solution.
---

diff --git a/src/utils/pintos b/src/utils/pintos
index d787035..fca610a 100755
--- a/src/utils/pintos
+++ b/src/utils/pintos
@@ -259,7 +259,8 @@ sub prepare_scratch_disk {
 	  foreach @puts;
 
 	# Write end-of-archive marker.
-	print { $disks{SCRATCH}{HANDLE} } "\0" x 1024;
+	write_fully ($disks{SCRATCH}{HANDLE}, $disks{SCRATCH}{FILE_NAME},
+		     "\0" x 1024);
     }
 
     # Make sure the scratch disk is big enough to get big files.