There's no reason to set wbt min lat and freeze request queue if current value is the same. Signed-off-by: Aleksei Zakharov <zakharov.a.g@xxxxxxxxx> --- block/blk-sysfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 590d1ef..d0df883 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -468,6 +468,9 @@ static ssize_t queue_wb_lat_store(struct request_queue *q, const char *page, else if (val >= 0) val *= 1000ULL; + if (wbt_get_min_lat(q) == val) + return count; + /* * Ensure that the queue is idled, in case the latency update * ends up either enabling or disabling wbt completely. We can't -- 2.7.4
