Mark Johnston a65d524afc Stop mirror synchronization before draining the I/O queue.
Regular I/O requests may be blocked by concurrent synchronization requests
targeted to the same LBAs, in which case they are moved to a holding queue
until the conflicting I/O completes. We therefore want to stop
synchronization before completing pending I/O in g_mirror_destroy_provider()
since this ensures that blocked I/O requests are completed as well.

Tested by:	pho
MFC after:	2 weeks
Sponsored by:	Dell EMC Isilon
2017-04-14 16:54:50 +00:00
..
2017-01-28 02:22:15 +00:00
2016-12-21 01:39:11 +00:00