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dm cache: fix incorrect 'idle_time' reset in IO tracker
author
Joe Thornber
<ejt@redhat.com>
Thu, 11 May 2017 10:14:16 +0000
(06:14 -0400)
committer
Mike Snitzer
<snitzer@redhat.com>
Mon, 15 May 2017 01:53:11 +0000
(21:53 -0400)
Some bios have no payload (eg, a FLUSH), don't reset the idle_time when
these come in.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
drivers/md/dm-cache-target.c
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diff --git
a/drivers/md/dm-cache-target.c
b/drivers/md/dm-cache-target.c
index 1db375f50a1321aae81492d1b3ac6392c52a00c2..0760ba409c21cd5489e7dd8e6ca3a01305e6abac 100644
(file)
--- 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;