Hello list,
So the OpenZFS testing framework experiences deadlocks on 10.12, which were
not present in 10.11. I'm perfectly willing to accept we have a problem in
OpenZFS, but the last one doesn't have any ZFS volumes mounted. (The last
ZFS dataset is trying to unmount - but stuck in vfs_busy)
The most interesting stacks are;
0xffffff90c1dabc10 0xffffff8029f8e973 _sleep((caddr_t) chan =
0xffffff8036f52a8c "\x02", (int) pri = 20, (const char *) wmsg =
0xffffff802a195750 "vnode_drain", (u_int64_t) abstime = 0, (int (*)(int))
continuation = <>, , (lck_mtx_t *) mtx = 0xffffff8036f52a28)
0xffffff90c1dabc50 0xffffff8029d1e808 msleep [inlined]((int) pri = 20,
(const char *) wmsg = 0xffffff802a195750 "vnode_drain")
0xffffff90c1dabc50 0xffffff8029d1e7e8 vnode_drain [inlined](void)
0xffffff90c1dabc50 0xffffff8029d1e7bb vnode_reclaim_internal((vnode *)
vp = <>, , (int) locked = 1, (int) reuse = <>, , (int) flags = <>, )
0xffffff90c1dabcd0 0xffffff8029d22c12 vflush((mount *) mp = <>, ,
(vnode *) skipvp = 0x0000000000000000, (int) flags = <>, )
0xffffff90c1dabd70 0xffffff8029d2dea4 dounmount((mount *) mp = <>, ,
(int) flags = <>, , (int) withref = 1, (vfs_context_t) ctx = <>, )
0xffffff90c1dabf50 0xffffff8029d2d98a unmount((proc_t) p = <>, ,
(unmount_args *) uap = 0xffffff8037f79660, (int32_t *) retval = <>, )
0xffffff90c1dabfb0 0xffffff802a02a366 unix_syscall64((x86_saved_state_t
*) state = <>, )
0x0000000000000000 0xffffff8029aa9f46 kernel`hndl_unix_scall64 + 0x16
Zombie Stacks:
0xffffff90e5f23aa0 0xffffff8029f8e973 _sleep((caddr_t) chan =
0xffffff8036f52a80 "\x0eà, (int) pri = 20, (const char *) wmsg =
0xffffff802a195f86 "vnode getiocount", (u_int64_t) abstime = 0, (int
(*)(int)) continuation = <>, , (lck_mtx_t *) mtx = 0xffffff8036f52a28)
0xffffff90e5f23af0 0xffffff8029d1e550 msleep [inlined]((const char *)
wmsg = <no location, value may have been optimized out>, )
0xffffff90e5f23af0 0xffffff8029d1e536 vnode_getiocount((vnode_t) vp =
<>, , (unsigned int) vid = 0, (int) vflags = <>, )
0xffffff90e5f23b60 0xffffff8029fb6e44 vget_internal [inlined]((vnode_t)
vp = 0xffffff8036f52a28, (int) vid = 0, (int) vflags = 0)
0xffffff90e5f23b60 0xffffff8029fb6e33 vnode_getwithref
[inlined]((vnode_t) vp = 0xffffff8036f52a28)
0xffffff90e5f23b60 0xffffff8029fb6e33 ubc_unmap((vnode *) vp =
0xffffff8036f52a28)
0xffffff90e5f23b70 0xffffff8029b60f3d
vnode_pager_last_unmap((memory_object_t) mem_obj = <>, )
0xffffff90e5f23bb0 0xffffff8029b92ebe memory_object_last_unmap
[inlined]((memory_object_t) memory_object = <>, )
0xffffff90e5f23bb0 0xffffff8029b92eb4
vm_object_deallocate((vm_object_t) object = <>, )
0xffffff90e5f23c80 0xffffff8029b83dfe
vm_map_enter_mem_object_control((vm_map_t) target_map = <>, ,
(vm_map_offset_t *) address = <>, , (vm_map_size_t) initial_size = <>, ,
(vm_map_offset_t) mask = <>, , (int) flags = <>, ,
(memory_object_control_t) control = <>, , (vm_object_offset_t) offset = <>,
, (boolean_t) copy = <>, , (vm_prot_t) cur_protection = <no location, value
may have been optimized out>, , (vm_prot_t) max_protection = <no location,
value may have been optimized out>, , (vm_inherit_t) inheritance = <no
location, value may have been optimized out>, )
0xffffff90e5f23f50 0xffffff8029f7b4c8 mmap((proc_t) p = <>, ,
(mmap_args *) uap = <>, , (user_addr_t *) retval = <>, )
0xffffff90e5f23fb0 0xffffff802a02a366 unix_syscall64((x86_saved_state_t
*) state = <>, )
0x0000000000000000 0xffffff8029aa9f46 kernel`hndl_unix_scall64 + 0x16
All other IO threads are hence stuck in vfs_busy(), and the other threads
appear to be doing normal sleep.
The full stackdump is available here; http://www.lundman.net/hardcopy9.txt
--
Jorgen Lundman | <lund...@lundman.net>
Unix Administrator | +81 (0)90-5578-8500
Shibuya-ku, Tokyo | Japan
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