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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 <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
hifive-unleashed-5.1
Joe Thornber 2017-05-11 06:14:16 -04:00 committed by Mike Snitzer
parent 2ea659a9ef
commit 072792dcdf
1 changed files with 3 additions and 0 deletions
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3
drivers/md/dm-cache-target.c
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@ -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;