ioping: move 64m temp working set size to rate test

And document 256k requests at linear test.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>

ioping.1

@@ -42,7 +42,7 @@ Working set size.
 Offset in input file.
 .TP
 .B \-L
-Use sequential operations rather than random.
+Use sequential operations rather than random (imply \fB-s 256k\fR).
 .TP
 .B \-C
 Use cached I/O.
@@ -51,7 +51,7 @@ Use cached I/O.
 Use direct I/O.
 .TP
 .B \-R
-Disk seek rate test (same as \fB-q -i 0 -w 3\fR).
+Disk seek rate test (same as \fB-q -i 0 -w 3 -S 64m\fR).
 .TP
 .B \-q
 Suppress human-readable output.

ioping.c

@@ -263,11 +263,11 @@ void parse_options(int argc, char **argv)
 			case 'L':
 				randomize = 0;
 				size = 1<<18;
-				temp_wsize = 1<<26;
 				break;
 			case 'R':
 				interval = 0;
 				deadline = 3000000;
+				temp_wsize = 1<<26;
 				quiet = 1;
 				break;
 			case 'D':