[Bug 1377142] Re: Bcache doesn't allow full unregistering without rebooting

[Stefan Bader]

Hm, it was helping in my case. So here from my re-run with utopic KVM
host:

# lsblk
NAME      MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda         8:0    0   16G  0 disk 
└─bcache0 251:0    0    8G  0 disk /mnt
sdb         8:16   0    8G  0 disk 
└─bcache0 251:0    0    8G  0 disk /mnt

# bcache-super-show /dev/sda
sb.magic		ok
sb.first_sector		8 [match]
sb.csum			29533C7B4D0F16EA [match]
sb.version		3 [cache device]

dev.label		(empty)
dev.uuid		91706fc8-39ae-4cbd-b0a0-8a202ee6a377
dev.sectors_per_block	1
dev.sectors_per_bucket	1024
dev.cache.first_sector	1024
dev.cache.cache_sectors	33553408
dev.cache.total_sectors	33554432
dev.cache.ordered	yes
dev.cache.discard	yes
dev.cache.pos		0
dev.cache.replacement	0 [lru]

cset.uuid               a8f70bd1-48df-462f-9a2c-ca4b8af9059c

# bcache-super-show /dev/sdb
sb.magic		ok
sb.first_sector		8 [match]
sb.csum			81BB0342C7270559 [match]
sb.version		1 [backing device]

dev.label		(empty)
dev.uuid		4ae46f48-d11d-45ca-a1ec-905eaf8e1da8
dev.sectors_per_block	1
dev.sectors_per_bucket	1024
dev.data.first_sector	16
dev.data.cache_mode	1 [writeback]
dev.data.cache_state	1 [clean]

cset.uuid               a8f70bd1-48df-462f-9a2c-ca4b8af9059c

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Title:
  Bcache doesn't allow full unregistering without rebooting

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