linux kernel error

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一台 linux 机器最近经常莫名其妙的挂掉。以下是日志信息。
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Sep 11 00:29:15 Test_mongodb kernel: INFO: task sh:2603 blocked for more than 120 seconds.
Sep 11 00:29:15 Test_mongodb kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 11 00:29:15 Test_mongodb kernel: sh            D 000000000000000a     0  2603      1 0x00000004
Sep 11 00:29:15 Test_mongodb kernel: ffff881f5f527ce8 0000000000000086 ffff881f5f527d98 ffffffffffffffe9
Sep 11 00:29:15 Test_mongodb kernel: ffff881f5f527c88 ffffffffa00b9129 ffff88200fab6040 000001010000000b
Sep 11 00:29:15 Test_mongodb kernel: ffff88200fab65f8 ffff881f5f527fd8 000000000000fb88 ffff88200fab65f8
Sep 11 00:29:15 Test_mongodb kernel: Call Trace:
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffffa00b9129>] ? ext4_check_acl+0x29/0x90 [ext4]
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffffa007fbf0>] ? ext4_file_open+0x0/0x130 [ext4]
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8150e555>] schedule_timeout+0x215/0x2e0
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8117e434>] ? nameidata_to_filp+0x54/0x70
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff812771e9>] ? cpumask_next_and+0x29/0x50
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8150e1d3>] wait_for_common+0x123/0x180
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff81063310>] ? default_wake_function+0x0/0x20
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8150e2ed>] wait_for_completion+0x1d/0x20
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8106513c>] sched_exec+0xdc/0xe0
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff81189fc0>] do_execve+0xe0/0x2c0
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff810095ea>] sys_execve+0x4a/0x80
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8100b4ca>] stub_execve+0x6a/0xc0
Sep 11 00:29:15 Test_mongodb kernel: INFO: task sh:2678 blocked for more than 120 seconds.
Sep 11 00:29:15 Test_mongodb kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 11 00:29:15 Test_mongodb kernel: sh            D 000000000000000a     0  2678      1 0x00000004
Sep 11 00:29:15 Test_mongodb kernel: ffff88200d8cdce8 0000000000000086 ffff88200d8cdd98 ffffffffffffffe9
Sep 11 00:29:15 Test_mongodb kernel: ffff88200d8cdc88 ffffffffa00b9129 ffff88201061f540 000001010000000b
Sep 11 00:29:15 Test_mongodb kernel: ffff88201061faf8 ffff88200d8cdfd8 000000000000fb88 ffff88201061faf8
Sep 11 00:29:15 Test_mongodb kernel: Call Trace:
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffffa00b9129>] ? ext4_check_acl+0x29/0x90 [ext4]
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffffa007fbf0>] ? ext4_file_open+0x0/0x130 [ext4]
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8150e555>] schedule_timeout+0x215/0x2e0
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8117e434>] ? nameidata_to_filp+0x54/0x70
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff812771e9>] ? cpumask_next_and+0x29/0x50
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8150e1d3>] wait_for_common+0x123/0x180
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff81063310>] ? default_wake_function+0x0/0x20
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8150e2ed>] wait_for_completion+0x1d/0x20
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8106513c>] sched_exec+0xdc/0xe0
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff81189fc0>] do_execve+0xe0/0x2c0
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff810095ea>] sys_execve+0x4a/0x80
Sep 11 00:29:15 Test_mongodb kernel: [<ffffffff8100b4ca>] stub_execve+0x6a/0xc0