Add --debug for enabling internal dumps on various actions
A little weak currently, when it's fully integrated everywhere in
fio it'll help find fio problems that I can't trigger.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/README b/README
index 3ef13ea..a13151c 100644
--- a/README
+++ b/README
@@ -62,6 +62,7 @@
------------
$ fio
+ --debug Enable some debugging options (see below)
--output Write output to file
--runtime Runtime in seconds
--latency-log Generate per-job latency logs
@@ -87,6 +88,18 @@
be used as an extra precaution. It will also enable a write check in the
io engine core to prevent an accidental write due to a fio bug.
+The debug switch allows adding options that trigger certain logging
+options in fio. Currently the options are:
+
+ process Dump info related to processes
+ file Dump info related to file actions
+ io Dump info related to IO queuing
+ mem Dump info related to memory allocations
+
+You can specify as many as you want, eg --debug=file,mem will enable
+file and memory debugging. Specifying --debug=help or --debug=? will
+dump the current modifier list.
+
Job file
--------