blk-iolatency: don't change the latency window

Early versions of these patches had us waiting for seconds at a time
during submission, so we had to adjust the timing window we monitored
for latency.  Now we don't do things like that so this is unnecessary
code.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index b59e545..893f888 100644 (file)
--- a/block/blk-iolatency.c
+++ b/block/blk-iolatency.c
@@ -468,16 +468,6 @@ static void iolatency_check_latencies(struct iolatency_grp *iolat, u64 now)
        }
        preempt_enable();
 
-       /*
-        * Our average exceeded our window, scale up our window so we are more
-        * accurate, but not more than the global timer.
-        */
-       if (stat.mean > iolat->cur_win_nsec) {
-               iolat->cur_win_nsec <<= 1;
-               iolat->cur_win_nsec =
-                       max_t(u64, iolat->cur_win_nsec, NSEC_PER_SEC);
-       }
-
        parent = blkg_to_lat(blkg->parent);
        if (!parent)
                return;