How to validate rsyslog filter printk messaging

Solution Verified - Updated -


  • Need to confirm that rsyslog filtering configuration and printk messaging is working appropriately. This is important when using the hung task timeout kernel settings.
  • The task X blocked for more than Y seconds message is generated at KERN_ERR level, and the stack dump that follows it is generated and KERN_INFO level
  • The rsyslog line in question looks like this:
*.info;mail.none;news.none;authpriv.none;cron.none;local3.none;local3.error     /var/log/messages

# cat /proc/sys/kernel/printk
3       4       1       7


  • Red Hat Enterprise Linux 6.3

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