If I run: $ sudo dmsetup create baddev '--table=0 1024 zero' $ sudo dmsetup load baddev '--table=0 1024 linear /dev/mapper/baddev 0' $ sudo dmsetup suspend baddev $ sudo dmsetup resume baddev the kernel immediately panics. Console output indicates infinite recursion in dm_block_ioctl. This is Fedora’s Linux 6.0.5 in case it matters. -- Sincerely, Demi Marie Obenour (she/her/hers) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/dm-devel