我在虚拟机中有一个挂起的任务，我认为它通常需要REISSUB Syskey风格的重新启动，而这在Google开发人员控制台中不可用。还有别的办法吗？通过开发人员控制台的reboot命令似乎也没有任何作用。这是一个相当大的问题-不知道如何恢复。
[505440.360052] INFO: task first-boot:21323 blocked for more than 120 seconds.
[505440.361344] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[505440.362581] first-boot D ffff88006c813780 0 21323 21314 0x00000000
[505440.362585] ffff880037095690 0000000000000086 ffff88006748a180 ffffffff8160d020
[505440.362587] 0000000000013780 ffff8800697fbfd8 ffff8800697fbfd8 ffff880037095690
[505440.362590] 0000000000000246 ffffffff8134fd89 ffff88006cbdf4a8 ffff8800247705f8
[505440.362592] Call Trace:
[505440.362599] [<ffffffff8134fd89>] ? _raw_spin_lock_irqsave+0x9/0x25
[505440.362608] [<ffffffffa0098660>] ? do_get_write_access+0x1ad/0x36a [jbd2]
[505440.362612] [<ffffffff8105fcfd>] ? autoremove_wake_function+0x2a/0x2a
[505440.362618] [<ffffffffa00b15b4>] ? ext4_dirty_inode+0x2a/0x45 [ext4]
[505440.362620] [<ffffffffa0098911>] ? jbd2_journal_get_write_access+0x21/0x38 [jbd2]
[505440.362626] [<ffffffffa00d1263>] ? __ext4_journal_get_write_access+0x4f/0x5e [ext4]
[505440.362631] [<ffffffffa00afb5e>] ? ext4_reserve_inode_write+0x37/0x7a [ext4]
[505440.362634] [<ffffffffa00afc09>] ? ext4_mark_inode_dirty+0x68/0x1da [ext4]
[505440.362638] [<ffffffffa00b159e>] ? ext4_dirty_inode+0x14/0x45 [ext4]
[505440.362643] [<ffffffffa00c66d8>] ? ext4_journal_start_sb+0x139/0x14f [ext4]
[505440.362647] [<ffffffffa00b15b4>] ? ext4_dirty_inode+0x2a/0x45 [ext4]
[505440.362650] [<ffffffffa00b158a>] ? ext4_evict_inode+0x2af/0x2af [ext4]
[505440.362654] [<ffffffff811174b3>] ? __mark_inode_dirty+0x22/0x17a
[505440.362657] [<ffffffffa00b006d>] ? ext4_setattr+0x2f2/0x377 [ext4]
[505440.362660] [<ffffffff8104b2a6>] ? current_fs_time+0x31/0x37
[505440.362662] [<ffffffff8110e393>] ? notify_change+0x1cb/0x293
[505440.362665] [<ffffffff81036628>] ? should_resched+0x5/0x23
[505440.362668] [<ffffffff810f94f8>] ? do_truncate+0x68/0x86
[505440.362669] [<ffffffff810f91ca>] ? __dentry_open+0x1cd/0x2c2
[505440.362672] [<ffffffff811056b7>] ? do_last+0x4b9/0x58d
[505440.362674] [<ffffffff81105d83>] ? path_openat+0xce/0x33a
[505440.362676] [<ffffffff810ce865>] ? pte_offset_kernel+0x16/0x35
[505440.362678] [<ffffffff811060b1>] ? do_filp_open+0x2a/0x6e
[505440.362680] [<ffffffff8134ea6c>] ? _cond_resched+0x7/0x1c
[505440.362683] [<ffffffff811b4589>] ? __strncpy_from_user+0x18/0x48
[505440.362686] [<ffffffff8110ee37>] ? alloc_fd+0x64/0x109
[505440.362687] [<ffffffff810fa07d>] ? do_sys_open+0x5e/0xe5
[505440.362690] [<ffffffff81354d92>] ? system_call_fastpath+0x16/0x1b
[505440.362692] INFO: task emulator64-x86:21325 blocked for more than 120 seconds.
[505440.363880] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[505440.365178] emulator64-x86 D ffff88006c813780 0 21325 21283 0x00000004
[505440.365181] ffff88003735f610 0000000000000086 0000000000000282 ffff8800374ef8d0
[505440.365183] 0000000000013780 ffff8800373b5fd8 ffff8800373b5fd8 ffff88003735f610
[505440.365185] 0000000000000246 ffffffff8134fd89 ffff88006cbdf4a8 ffff8800247705f8
[505440.365187] Call Trace:
[505440.365190] [<ffffffff8134fd89>] ? _raw_spin_lock_irqsave+0x9/0x25
[505440.365194] [<ffffffffa0098660>] ? do_get_write_access+0x1ad/0x36a [jbd2]
[505440.365196] [<ffffffff8105fcfd>] ? autoremove_wake_function+0x2a/0x2a
[505440.365200] [<ffffffffa00b15b4>] ? ext4_dirty_inode+0x2a/0x45 [ext4]
[505440.365203] [<ffffffffa0098911>] ? jbd2_journal_get_write_access+0x21/0x38 [jbd2]
[505440.365208] [<ffffffffa00d1263>] ? __ext4_journal_get_write_access+0x4f/0x5e [ext4]
[505440.365212] [<ffffffffa00afb5e>] ? ext4_reserve_inode_write+0x37/0x7a [ext4]
[505440.365216] [<ffffffffa00afc09>] ? ext4_mark_inode_dirty+0x68/0x1da [ext4]
[505440.365219] [<ffffffffa00b159e>] ? ext4_dirty_inode+0x14/0x45 [ext4]
[505440.365224] [<ffffffffa00c66d8>] ? ext4_journal_start_sb+0x139/0x14f [ext4]
[505440.365228] [<ffffffffa00b15b4>] ? ext4_dirty_inode+0x2a/0x45 [ext4]
[505440.365231] [<ffffffffa00b158a>] ? ext4_evict_inode+0x2af/0x2af [ext4]
[505440.365234] [<ffffffff811174b3>] ? __mark_inode_dirty+0x22/0x17a
[505440.365236] [<ffffffff8110cbbf>] ? touch_atime+0xe7/0x10c
[505440.365239] [<ffffffff810b6729>] ? generic_file_aio_read+0x570/0x5cf
[505440.365241] [<ffffffff811056ea>] ? do_last+0x4ec/0x58d
[505440.365243] [<ffffffff810fa464>] ? do_sync_read+0xb4/0xec
[505440.365245] [<ffffffff810fab4f>] ? vfs_read+0x9f/0xe6
[505440.365247] [<ffffffff810fabdb>] ? sys_read+0x45/0x6b
[505440.365249] [<ffffffff81036628>] ? should_resched+0x5/0x23
[505440.365251] [<ffffffff81354d92>] ? system_call_fastpath+0x16/0x1b
[505800.364068] INFO: task sshd:21522 blocked for more than 120 seconds.
[505800.365213] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[505800.366502] sshd D ffff88006c813780 0 21522 21519 0x00000000
[505800.366506] ffff8800677b08f0 0000000000000086 ffff880000000000 ffffffff8160d020
[505800.366508] 0000000000013780 ffff880037275fd8 ffff880037275fd8 ffff8800677b08f0
[505800.366510] 0000000000000246 ffffffff8134fd89 ffff88006cbd6460 ffff88003cb91748
[505800.366513] Call Trace:
[505800.366520] [<ffffffff8134fd89>] ? _raw_spin_lock_irqsave+0x9/0x25
[505800.366528] [<ffffffffa0098660>] ? do_get_write_access+0x1ad/0x36a [jbd2]
[505800.366532] [<ffffffff8105fcfd>] ? autoremove_wake_function+0x2a/0x2a
[505800.366535] [<ffffffff8110cf1d>] ? inode_init_always+0xfa/0x1aa
[505800.366538] [<ffffffffa0098911>] ? jbd2_journal_get_write_access+0x21/0x38 [jbd2]
[505800.366545] [<ffffffffa00d1263>] ? __ext4_journal_get_write_access+0x4f/0x5e [ext4]
[505800.366549] [<ffffffffa00aaf59>] ? ext4_new_inode+0x418/0xc6b [ext4]
[505800.366552] [<ffffffffa009779c>] ? jbd2__journal_start+0x8a/0xce [jbd2]
[505800.366556] [<ffffffffa00b4e1e>] ? ext4_mknod+0x77/0x13a [ext4]
[505800.366561] [<ffffffffa00c66d8>] ? ext4_journal_start_sb+0x139/0x14f [ext4]
[505800.366564] [<ffffffff8113bfa2>] ? __dquot_initialize+0x1d/0xfe
[505800.366568] [<ffffffffa00b4e5f>] ? ext4_mknod+0xb8/0x13a [ext4]
[505800.366571] [<ffffffff8110498d>] ? vfs_mknod+0x9c/0xbe
[505800.366573] [<ffffffff81036628>] ? should_resched+0x5/0x23
[505800.366576] [<ffffffff812f9f7b>] ? unix_bind+0x15a/0x2b4
[505800.366591] [<ffffffff8128074d>] ? sys_bind+0x75/0xad
[505800.366594] [<ffffffff81280532>] ? sys_socket+0x39/0x57
[505800.366596] [<ffffffff81354d92>] ? system_call_fastpath+0x16/0x1b
[505800.366598] INFO: task mktemp:21529 blocked for more than 120 seconds.
[505800.367748] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[505800.369024] mktemp D ffff88006c813780 0 21529 21528 0x00000000
[505800.369027] ffff88006754b060 0000000000000086 ffffffff00000000 ffffffff8160d020
[505800.369030] 0000000000013780 ffff880036e63fd8 ffff880036e63fd8 ffff88006754b060
[505800.369032] 0000000000000246 ffffffff8134fd89 ffff88006cbd6460 ffff88003cb91748
[505800.369034] Call Trace:
[505800.369037] [<ffffffff8134fd89>] ? _raw_spin_lock_irqsave+0x9/0x25
[505800.369040] [<ffffffffa0098660>] ? do_get_write_access+0x1ad/0x36a [jbd2]
[505800.369043] [<ffffffff8105fcfd>] ? autoremove_wake_function+0x2a/0x2a
[505800.369046] [<ffffffffa0098911>] ? jbd2_journal_get_write_access+0x21/0x38 [jbd2]
[505800.369051] [<ffffffffa00d1263>] ? __ext4_journal_get_write_access+0x4f/0x5e [ext4]
[505800.369055] [<ffffffffa00aaf59>] ? ext4_new_inode+0x418/0xc6b [ext4]
[505800.369057] [<ffffffffa009779c>] ? jbd2__journal_start+0x8a/0xce [jbd2]
[505800.369061] [<ffffffffa00b4f55>] ? ext4_create+0x74/0x12f [ext4]
[505800.369066] [<ffffffffa00c66d8>] ? ext4_journal_start_sb+0x139/0x14f [ext4]
[505800.369068] [<ffffffff8113bfa2>] ? __dquot_initialize+0x1d/0xfe
[505800.369072] [<ffffffffa00b4f97>] ? ext4_create+0xb6/0x12f [ext4]
[505800.369074] [<ffffffff81104a15>] ? vfs_create+0x66/0x88
[505800.369076] [<ffffffff81102a2d>] ? d_alloc_and_lookup+0x3a/0x60
[505800.369078] [<ffffffff81105459>] ? do_last+0x25b/0x58d
[505800.369080] [<ffffffff81105d83>] ? path_openat+0xce/0x33a
[505800.369083] [<ffffffff810ce865>] ? pte_offset_kernel+0x16/0x35
[505800.369085] [<ffffffff811060b1>] ? do_filp_open+0x2a/0x6e
[505800.369087] [<ffffffff8134ea6c>] ? _cond_resched+0x7/0x1c
[505800.369090] [<ffffffff811b4589>] ? __strncpy_from_user+0x18/0x48
[505800.369092] [<ffffffff8110ee37>] ? alloc_fd+0x64/0x109
[505800.369094] [<ffffffff810fa07d>] ? do_sys_open+0x5e/0xe5
[505800.369096] [<ffffffff81354d92>] ? system_call_fastpath+0x16/0x1b
似乎在5分钟后，通过开发人员控制台发出的重新启动命令确实对虚拟机进行了有力的重新启动，并且重新启动正常。开发人员控制台在此期间没有给出任何反馈，所以我认为它也挂起了，等待挂起的任务完成。