Recommend integrating cache early.

diff --git a/doc/filesys.texi b/doc/filesys.texi
index e0c1618b49e46b74786b28d1476aa0521019a5a6..47b9e282ae65bb79737fe8fe10a6f95db7be5342 100644 (file)
--- a/doc/filesys.texi
+++ b/doc/filesys.texi
@@ -261,6 +261,11 @@ return to the process immediately.  The read-ahead request for disk
 block 2 should be handled asynchronously, in the background.
 @end table
 
+@strong{We recommend integrating the cache into your design early.}  In
+the past, many groups have tried to tack the cache onto a design late in
+the design process.  This is very difficult.  These groups have often
+turned in projects that failed most or all of the tests.
+
 @node File System Synchronization
 @subsection Synchronization