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authorJosef Bacik <jbacik@fb.com>2018-07-16 19:12:22 +0300
committerJens Axboe <axboe@kernel.dk>2018-07-16 19:15:17 +0300
commitd607eefa3b55c7b8cd9902e9209fc1235f88ccd9 (patch)
tree74c55cc45f8bc35b71a375f4320b556f4e3d1724
parentf6352103d2e0ad2d2066725eb19bfdfb8763239b (diff)
downloadlinux-d607eefa3b55c7b8cd9902e9209fc1235f88ccd9.tar.xz
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>
-rw-r--r--block/blk-iolatency.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c
index b59e5451680b..893f888eebb1 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;