I will give that commit a try. Thanks. On 12/22/2017 05:00 PM, Bart Van Assche wrote: > On Fri, 2017-12-22 at 10:53 +0100, Christian Borntraeger wrote: >> any quick ideas? > > Hello Christian, > > Was commit afc567a4977b ("dm table: fix regression from improper dm_dev_internal.count > refcount_t conversion") included in your test kernel? > > Bart. >