> On Thu, Aug 10, 2006 at 01:29:08PM +0200, Stefan Bader wrote: >> But what effect should a missing queue have? Same >> as device is congested or not or let the call fail somehow? > > I'm curious - under what circumstances is this missing: > Is it intentional, or is it perhaps a race that needs fixing? > More or less intentional. If a device is (virtually) ripped from the system the driver will throw everything away. Device-mapper still has a reference to the bdev but the queue is cleaned and removed. I am not sure whether the any congested call would ever be triggered in that situation. But at least the unplug all is when user-space tries to change the maps to remove or replace the missing device. And very likely the flush all call would be used as well (probably after that). Stefan -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
