dm cache: track IO to the origin device using io_tracker

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Joe Thornber 2015-05-15 15:18:01 +01:00 • committed by Mike Snitzer
commit 066dbaa386