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Virtual Machine's Root File System Becomes Read Only (Doc ID 2552609.1)

Last updated on JUNE 09, 2021

Applies to:

Oracle VM - Version 3.2.1 and later
Linux x86-64

Symptoms

The symptoms of this issue range from virtual machine file systems going into read-only to IO related commands go hang on dom0. The most conclusive error text is in syslog, 

May 24 07:32:04 <hostname> kernel: INFO: task lsi_mrdsnmpagen:7102 blocked for more than 120 seconds.
May 24 07:32:04 <hostname> kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
May 24 07:32:04 <hostname> kernel: lsi_mrdsnmpagen D ffff88085ee33980 0 7102 1 0x00000080
May 24 07:32:04 <hostname> kernel: ffff88082341bc98 0000000000000286 ffff88082341bfd8 0000000000013980
May 24 07:32:04 <hostname> kernel: ffff88082341a010 0000000000013980 0000000000013980 0000000000013980
May 24 07:32:04 <hostname> kernel: ffff88082341bfd8 0000000000013980 ffff88084fb6c300 ffff880820634080
May 24 07:32:04 <hostname> kernel: Call Trace:
May 24 07:32:04 <hostname> kernel: [] schedule+0x29/0x70
May 24 07:32:04 <hostname> kernel: [ megasas_issue_blocked_cmd+0xc5/0x170 [megaraid_sas]
May 24 07:32:04 <hostname> kernel: [] ? wake_up_bit+0x40/0x40
May 24 07:32:04 <hostname> kernel: [] megasas_mgmt_fw_ioctl+0x4ce/0x940 [megaraid_sas]
May 24 07:32:04 <hostname> kernel: [] megasas_mgmt_ioctl_fw+0x19b/0x220 [megaraid_sas]
May 24 07:32:04 <hostname> kernel: [] ? error_swapgs+0xdd/0x110
May 24 07:32:04 <hostname> kernel: [] megasas_mgmt_ioctl+0x30/0x50 [megaraid_sas]
May 24 07:32:04 <hostname> kernel: [] do_vfs_ioctl+0x8c/0x350
May 24 07:32:04 <hostname> kernel: [] ? error_swapgs+0x97/0x110
May 24 07:32:04 <hostname> kernel: [] ? error_swapgs+0x90/0x110
May 24 07:32:04 <hostname> kernel: [] ? error_swapgs+0x89/0x110
May 24 07:32:04 <hostname> kernel: [] ? error_swapgs+0x82/0x110
May 24 07:32:04 <hostname> kernel: [] ? error_swapgs+0x7b/0x110
May 24 07:32:04 <hostname> kernel: [] sys_ioctl+0xa1/0xb0
May 24 07:32:04 <hostname> kernel: [] ? system_call_after_swapgs+0xd4/0x1a6
May 24 07:32:04 <hostname> kernel: [] ? system_call_after_swapgs+0xcd/0x1a6
May 24 07:32:04 <hostname> kernel: [] ? system_call_after_swapgs+0xc6/0x1a6
May 24 07:32:04 <hostname> kernel: [] ? system_call_after_swapgs+0xb8/0x1a6
May 24 07:32:04 <hostname> kernel: [] system_call_fastpath+0x16/0x1b
May 24 07:32:04 <hostname> kernel: [] ? system_call_after_swapgs+0x33/0x1a6

...

May 24 07:32:04 <hostname> kernel: megasas: [ 5]waiting for 149 commands to complete for scsi0
May 24 07:32:04 <hostname> kernel: megasas: [10]waiting for 149 commands to complete for scsi0
May 24 07:32:04 <hostname> kernel: megasas: [15]waiting for 149 commands to complete for scsi0
...
May 24 07:32:04 <hostname> kernel: megaraid_sas: pending commands remain after waiting, will reset adapter scsi0.
May 24 07:32:04 <hostname> kernel: megaraid_sas: resetting fusion adapter scsi0.
May 24 07:32:04 <hostname> kernel: megasas: Waiting for FW to come to ready state
May 24 07:32:04 <hostname> kernel: megasas: FW now in Ready state
May 24 07:32:04 <hostname> kernel: megasas:IOC Init cmd success

 

Changes

No changes has been made to this system. 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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