From 072792dcdfc8d5f91a26050e5665285f50afebf5 Mon Sep 17 00:00:00 2001 From: Joe Thornber Date: Thu, 11 May 2017 06:14:16 -0400 Subject: dm cache: fix incorrect 'idle_time' reset in IO tracker Some bios have no payload (eg, a FLUSH), don't reset the idle_time when these come in. Signed-off-by: Joe Thornber Signed-off-by: Mike Snitzer --- drivers/md/dm-cache-target.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/md') diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 1db375f50a13..0760ba409c21 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -94,6 +94,9 @@ static void iot_io_begin(struct io_tracker *iot, sector_t len) static void __iot_io_end(struct io_tracker *iot, sector_t len) { + if (!len) + return; + iot->in_flight -= len; if (!iot->in_flight) iot->idle_time = jiffies; -- cgit v1.2.3