Comment 42 for bug 159031

Looks like a hung sshfs also breaks hibernating:

[58492.144636] PM: Marking nosave pages: 000000000009d000 - 0000000000100000
[58492.144640] PM: Marking nosave pages: 00000000da99f000 - 00000000dafff000
[58492.144661] PM: Marking nosave pages: 00000000db000000 - 0000000100000000
[58492.145172] PM: Basic memory bitmaps created
[58492.145174] PM: Syncing filesystems ... done.
[58492.156416] Freezing user space processes ...
[58512.124270] Freezing of tasks failed after 20.00 seconds (1 tasks refusing to freeze, wq_busy=0):
[58512.124315] synapse D 0000000000000000 0 15217 1623 0x00800004
[58512.124318] ffff880157397ac8 0000000000000082 ffff880157397fd8 ffff880157396000
[58512.124321] 0000000000013d00 ffff880195479a98 ffff880157397fd8 0000000000013d00
[58512.124323] ffff8801dc118000 ffff8801954796e0 ffff880184204000 ffff880184204000
[58512.124326] Call Trace:
[58512.124332] [<ffffffff8125b70d>] request_wait_answer+0xbd/0x230
[58512.124337] [<ffffffff81087fb0>] ? autoremove_wake_function+0x0/0x40
[58512.124339] [<ffffffff8125b8fd>] fuse_request_send+0x7d/0xc0
[58512.124341] [<ffffffff8125f4e3>] fuse_dentry_revalidate+0x153/0x2a0
[58512.124345] [<ffffffff8116f0b7>] do_revalidate+0x17/0x60
[58512.124347] [<ffffffff81171606>] do_lookup+0x236/0x2e0
[58512.124350] [<ffffffff8118165e>] ? vfsmount_lock_local_unlock+0x1e/0x30
[58512.124352] [<ffffffff8118165e>] ? vfsmount_lock_local_unlock+0x1e/0x30
[58512.124354] [<ffffffff81171816>] link_path_walk+0x166/0xc40
[58512.124356] [<ffffffff8108bcdc>] ? hrtimer_try_to_cancel+0x4c/0xe0
[58512.124359] [<ffffffff811725eb>] do_path_lookup+0x5b/0x160
[58512.124361] [<ffffffff81172957>] user_path_at+0x57/0xa0
[58512.124363] [<ffffffff815c326e>] ? _raw_spin_lock+0xe/0x20
[58512.124366] [<ffffffff8109abc3>] ? futex_wake+0x103/0x120
[58512.124369] [<ffffffff81169649>] vfs_fstatat+0x39/0x70
[58512.124371] [<ffffffff8109cebb>] ? do_futex+0xbb/0x210
[58512.124374] [<ffffffff81055e11>] ? finish_task_switch+0x41/0xe0
[58512.124376] [<ffffffff8116969e>] vfs_lstat+0x1e/0x20
[58512.124378] [<ffffffff8116993a>] sys_newlstat+0x1a/0x40
[58512.124381] [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
[58512.124400]
[58512.124401] Restarting tasks ... done.
[58512.125483] PM: Basic memory bitmaps freed
[58512.125492] video LNXVIDEO:00: Restoring backlight state