来自 syslog@localhost 的消息表示什么？

Question

Message from syslogd@saskappcu at Mar 18 13:24:54 ...
 kernel:BUG: soft lockup - CPU#30 stuck for 61s! [events/30:161]

Message from syslogd@saskappcu at Mar 18 13:24:54 ...
 kernel:Process events/30 (pid: 161, ti=f4ea4000 task=f4e5faa0 task.ti=f4ea4000)

Message from syslogd@saskappcu at Mar 18 13:24:54 ...
 kernel:Stack:

Message from syslogd@saskappcu at Mar 18 13:24:54 ...
 kernel:Call Trace:

Message from syslogd@saskappcu at Mar 18 13:24:54 ...
 kernel:Code: 00 89 51 04 89 0a 89 43 20 89 43 24 8b 43 08 39 d8 74 23 83 40 7c 01 31 c9 8b 7b 0c 8b 15 58 09 ac c0 8b 02 39 c2 75 09 eb 31 90 <8b> 00 39 d0 74 2a 3b 78 0c 75 f5 89 d8 ba 00 00 04 00 e8 b9 a0

Message from syslogd@saskappcu at Mar 18 13:24:58 ...
 kernel:BUG: soft lockup - CPU#8 stuck for 61s! [buildop:2223]

Message from syslogd@saskappcu at Mar 18 13:24:58 ...
 kernel:Process buildop (pid: 2223, ti=e9724000 task=f3ba0aa0 task.ti=e9724000)

Message from syslogd@saskappcu at Mar 18 13:24:58 ...
 kernel:Stack:

Message from syslogd@saskappcu at Mar 18 13:24:58 ...
 kernel:Call Trace:

Message from syslogd@saskappcu at Mar 18 13:24:58 ...
 kernel:Code: 26 00 89 c8 f0 81 28 00 00 00 01 74 05 e8 2c fe ff ff c3 8d b4 26 00 00 00 00 66 ba 00 01 f0 66 0f c1 10 38 f2 74 0e f3 90 8a 10 <eb> f6 66 83 38 00 75 f4 eb e5 c3 8d 74 26 00 f0 81 28 00 00 00

Answer 1

A softlockup is defined as a bug that causes the kernel to loop in kernel mode for more than 20 seconds without giving other tasks a chance to run.

日志

kernel:BUG: soft lockup - CPU#30 stuck for 61s! [events/30:161]

由kernel/kernel/watchdog.c

中的以下行生成

pr_emerg("BUG: soft lockup - CPU#%d stuck for %us! [%s:%d]\n",
         smp_processor_id(),
         duration,
         current->comm,
         task_pid_nr(current));

意思是

系统中CPU core 30,
过去 61 秒一直忙于执行内核代码。
系统上的当前线程是 events/30、
其进程 ID 为 161。

有关更多详细信息，请查看 kernel/Documentation/lockup-watchdogs.txt。

来自 syslog@localhost 的消息表示什么？

What does this message from syslog@localhost signifies?

unix

syslog

linux-kernel

syslog-ng