0.7.0-rc3 deadlocks constantly at zpool export

[bzzz77]

System information

Type	Version/Name
Distribution Name
Distribution Version
Linux Kernel	3.10.0-327.36.3.el7
Architecture	x86-64
ZFS Version	0.7.0-rc3
SPL Version	0.7.0-rc2

Describe the problem you're observing

zpool export got stuck:

[ 481.733056] z_zvol D 0000000000000000 0 3965 2 0x00000080
[ 481.733064] ffff880fb8e0bd18 0000000000000046 ffff880fb942c500 ffff880fb8e0bfd8
[ 481.733070] ffff880fb8e0bfd8 ffff880fb8e0bfd8 ffff880fb942c500 ffff880fe0192400
[ 481.733076] 0000000000000012 0000000000000013 ffff880fe01924d8 0000000000000000
[ 481.733082] Call Trace:
[ 481.733098] [] schedule+0x29/0x70
[ 481.733116] [] taskq_wait_outstanding+0x95/0xf0 [spl]
[ 481.733124] [] ? wake_up_atomic_t+0x30/0x30
[ 481.733207] [] zvol_task_cb+0x2c9/0x450 [zfs]
[ 481.733213] [] ? __schedule+0x2d8/0x900
[ 481.733223] [] taskq_thread+0x246/0x470 [spl]
[ 481.733234] [] ? wake_up_state+0x20/0x20
[ 481.733242] [] ? taskq_thread_spawn+0x60/0x60 [spl]
[ 481.733251] [] kthread+0xcf/0xe0
[ 481.733257] [] ? kthread_create_on_node+0x140/0x140
[ 481.733265] [] ret_from_fork+0x58/0x90
[ 481.733271] [] ? kthread_create_on_node+0x140/0x140

Describe how to reproduce the problem

zpool create -f test /dev/sdb1 /dev/sdc1 /dev/sdd1

zfs create test/test

zpool destroy test

Include any warning/errors/backtraces from the system logs

[loli10K]

Duplicated/related to #5195?

[kernelOfTruth]

@bzzz77

is it just a typo or are you really running different versions of SPL and ZFS ?

[bzzz77]

yes, I did, for quite long time :) closing as can't reproduce with refreshed SPL. thanks.