iolog: Added new option description to HOWTO

Signed-off-by: Adam Kupczyk <akupczyk@redhat.com>

diff --git a/HOWTO b/HOWTO
index 70eed2805c2d96811d4238afaed645f4f3a10e45..4d905d16f3ecda61adebdc3910015077bd4629e1 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -2324,6 +2324,12 @@ I/O replay
        replay, the file needs to be turned into a blkparse binary data file first
        (``blkparse <device> -o /dev/null -d file_for_fio.bin``).
 
+.. option:: read_iolog_chunked=bool
+
+       Determines how iolog is read. If false(default) entire :option:`read_iolog`
+       will be read at once. If selected true, input from iolog will be read
+       gradually. Useful when iolog is very large, or it is generated.
+
 .. option:: replay_no_stall=bool
 
        When replaying I/O with :option:`read_iolog` the default behavior is to