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如何自动生成一个 vmcore 以帮助分析软死锁（soft lockup）的问题?

Solution Verified - Updated 2018-03-13T01:19:40+00:00 -

Issue

系统出现软死锁的问题，如 BUG: soft lockup - CPU#3 stuck for 11s! [frob:2342]
红帽技术支持需要您提供出现软死锁问题时系统的 vmcore 以帮助对问题进行分析。
使用 What is the Sysrq facility and how do I use it? 中介绍的方法监控并手工转储 vmcore 不太现实。
需要在软死锁发生时自动产生一个 vmcore 转储。

Environment

Red Hat Enterprise Linux 5.3 (或更新版本) - 所有架构
Red Hat Enterprise Linux 6 - 所有架构
Red Hat Enterprise Linux 7 - 所有架构
日志文件中的软死锁信息。

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