From 47cb393ee4815e10ab66f981fed581afdcc7caac Mon Sep 17 00:00:00 2001
From: John Pittman <jpittman@redhat.com>
Date: Tue, 8 Jan 2019 16:56:13 -0500
Subject: [PATCH] block: doc: add slice_idle_us to bfq documentation

Of the tunables available for the bfq I/O scheduler, the only one
missing from the documentation in 'Documentation/block/bfq-iosched.txt'
is slice_idle_us. Add this tunable to the documentation and a short
explanation of its purpose.

Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 Documentation/block/bfq-iosched.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/block/bfq-iosched.txt b/Documentation/block/bfq-iosched.txt
index 8d8d8f06cab29..98a8dd5ee385d 100644
--- a/Documentation/block/bfq-iosched.txt
+++ b/Documentation/block/bfq-iosched.txt
@@ -357,6 +357,13 @@ video playing/streaming, a very low drop rate may be more important
 than maximum throughput. In these cases, consider setting the
 strict_guarantees parameter.
 
+slice_idle_us
+-------------
+
+Controls the same tuning parameter as slice_idle, but in microseconds.
+Either tunable can be used to set idling behavior.  Afterwards, the
+other tunable will reflect the newly set value in sysfs.
+
 strict_guarantees
 -----------------