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Knowledge Base

A VXVM Software Running Mechanism Defect Led to an Error

Publication Date:  2012-07-19  |   Views:  426  |   Downloads:  0  |   Author:  q00002810  |   Document ID:  EKB1000008315

Contents
Issue Description Alarm Information Handling Process Root Cause Suggestions

Issue Description

Product and version information:

  • S5500T V100R001 V100R002
  • S5600T V100R001 V100R002
  • S5800T V100R001 V100R002
  • S6800T V100R001 V100R002
  • Application server operating system: Sles 10 SP3 x86
  • Connection: iSCSI

Procedure:
1.We ran the suse11-sp1-os: # shutdown -r now command to restart the host that was running services. The host failed to shut down and halted when it was powering off.
2.Shutdown failure log: Kernel BUG at fs/jfs/super.c:119.

Alarm Information

None

Handling Process

Remove power from the host and power it on again. Then start the host.

Root Cause

Shutdown failure log:
Kernel BUG at fs/jfs/super.c:119
 

We can see from the preceding figure that the system attempted to delete a device that was already mounted when it was shutting down. However, the device was being accessed at the time, as a result, the device failed to be deleted, and therefore the shutdown failed. The symptom was that the power-off process halted. This was due to a Linux kernel bug.

Suggestions

The shutdown operation must follow this proper sequence: stop services completely and then shut down the host.
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