From d607eefa3b55c7b8cd9902e9209fc1235f88ccd9 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fb.com>
Date: Mon, 16 Jul 2018 12:12:22 -0400
Subject: [PATCH] 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>
---
block/blk-iolatency.c | 10 ----------
1 file changed, 10 deletions(-)
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index b59e5451680b5..893f888eebb1a 100644
--- 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;
--
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