[PATCH] Add 'norandommap' option

With this option given, fio will not keep track of what parts of a file
has been read/written or not. So for random io, we may read/write a block
a block more than once (or not at all). Thus this option conflicts with
doing write verification.

This is a first step for doing truly randomly sized blocks of io.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h
index 4af8a4d..b48ef70 100644
--- a/fio.h
+++ b/fio.h
@@ -202,6 +202,7 @@
 	unsigned int rand_repeatable;
 	unsigned int write_lat_log;
 	unsigned int write_bw_log;
+	unsigned int norandommap;
 
 	unsigned int bs;
 	unsigned int min_bs;