] https://bugzilla.redhat.com/show_bug.cgi?id=789632
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WARNING: at fs/btrfs/extent-tree.c:5985
btrfs_alloc_free_block+0xc5/0x292 [btrfs]()
Hardware name: ProLiant BL460c G6
Modules linked in: btrfs zlib_deflate lzo_compress ext4 jbd2 crc16
ipmi_devintf autofs4
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WARNING: at fs/btrfs/extent-tree.c:5985
btrfs_alloc_free_block+0xc5/0x292 [btrfs]()
Hardware name: ProLiant BL460c G6
Modules linked in: btrfs zlib_deflate lzo_compress ext4 jbd2 crc16
ipmi_devintf autofs4 be2iscsi iscsi_boot_sysfs ib_iser rdma_cm ib_cm
iw_cm ib_sa ib_mad