drbd: fix regression, we need to close drbd epochs during normal operation
commit e2041475e6ddb081734d161f6421977323f5a9b9 drbd: Starting with protocol 96 we can allow app-IO while receiving the bitmap Contained a bad chunk that tried to optimize away drbd barriers during bitmap exchange, but accidentally dropped them for normal mode as well. Impact: depending on activity log size and access pattern, activity log extents may not be recycled in time, causeing IO to block indefinetely. Fix: skip drbd barriers only if there is no connection to send them on, or the request being completed has not been on the network at all. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
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