tree 21867997b4b5be3b677e0265adbfd33d3a6ef4ad
parent 2bb812df63bbd246bd39d10f2e810b2a0a59e99e
author Joe Thornber <ejt@redhat.com> 1417090868 +0000
committer Mike Snitzer <snitzer@redhat.com> 1417451412 -0500

dm cache: only use overwrite optimisation for promotion when in writeback mode

Overwrite causes the cache block and origin blocks to diverge, which
is only allowed in writeback mode.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org