Make pre_read imply invalidate=0
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/HOWTO b/HOWTO
index e22f745..494b3e6 100644
--- a/HOWTO
+++ b/HOWTO
@@ -714,7 +714,9 @@
when it's time to do IO to that file.
pre_read=bool If this is given, files will be pre-read into memory before
- starting the given IO operation.
+ starting the given IO operation. This will also clear
+ the 'invalidate' flag, since it is pointless to pre-read
+ and then drop the cache.
unlink=bool Unlink the job files when done. Not the default, as repeated
runs of that job would then waste time recreating the file