Kirk McKusick 7e1a6d4777 When using the force option to shut down a memory-disk device, ... I/O operations already in its queue were not being properly drained. The GEOM framework does the queue draining, but the device driver needs to wait for the draining to happen. The waiting is done by adding a g_md_providergone() function to wait for the I/O operations to finish up. It is likely that every GEOM provider that implements orphaning attached GEOM consumers needs to use the "providergone" mechanism for this same reason, but some of them do not do so. Apparently Kenneth Merry (ken@) added the drain for just such races, but he missed adding it to some of the device drivers that needed it. Submitted by: Chuck Silvers Reviewed by: imp Tested by: Chuck Silvers MFC after: 1 week Sponsored by: Netflix		2019-03-31 21:34:58 +00:00
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md.c	When using the force option to shut down a memory-disk device,	2019-03-31 21:34:58 +00:00