Ticket #13476 (closed defect: worksforme)

Opened 6 years ago

Last modified 3 years ago

Filesystem corruption when VM with 4 CPU and 8 GB RAM

Reported by: Dude Owned by:
Component: virtual disk Version: VirtualBox 4.3.16
Keywords: Cc:
Guest type: Linux Host type: Mac OS X


Hardware: Mac Pro 2009 8-core, 10.6.8/ 64 bit, 24 GB RAM, Apple HW RAID 4 TB. VM: VBox 4.3.16, 4 CPU, 8 GB RAM, SATA and SAS devices. Oracle Linux 6.5 x64

I'm setting up a virtual machine to install Oracle Database 12c. The Database configuration assistant is repeatedly causing some of the following errors:

Read-error on swap-device EXT4-fs (dm-0): previous I/O error to superblock detected Buffer I/O error on device dm-0, logical block 0 EXT-fs error (device dm-0) ext4_get_inode_loc comm kworker/u:5: unable to read itable block failed command: WRITE FPDMA QUEUED kernel panic - not syncing

I've been playing all weekend trying several different kernels and settings. I tried 2.6.32, 2.6.39 and 3.8.13, but all produce the same errors. The only thing that seemed to improve was to increase the timeout of the devices, e.g. echo 180 > /sys/block/sda/device/timeout. However, although the errors at the console disappeared, the installation was still corrupt and accessing the command line and typing "ls", for example, would show "bus error".

What corrected the problem in the end was to reduce the VM to 1 CPU and the installation worked fine.

Attachments Download (485.0 KB) - added by Dude 6 years ago.
Vbox logs and error screenshots

Change History

Changed 6 years ago by Dude

Vbox logs and error screenshots

comment:1 Changed 4 years ago by Law

sorry, wrong post

Last edited 4 years ago by Law (previous) (diff)

comment:2 Changed 4 years ago by frank

First, you are using VBox 4.3.16 which is ancient. I would expect that you upgrade at least to 4.3.38 or better 5.0.24. Second, where do you install the Oracle DB? Is the target located on a shared folder?

comment:3 Changed 4 years ago by aeichner

Your host can't cope with the I/O load generated by the guest, there are I/O requests which take over 60 seconds on the host to complete. OS X is known to have a quite bad I/O stack, high I/O pressure will make UI sluggish for example. To workaround it you can try to set the following extradata to limit the amount of I/O requests the guest can generate:

VBoxManage setextradata <VM name> "VBoxInternal/Devices/ahci/0/Config/CmdSlotsAvail" <1-32>

Getting the right value will need some experiments to avoid the hangs but without crippling the I/O performance too much.

comment:4 Changed 3 years ago by frank

  • Status changed from new to closed
  • Resolution set to worksforme
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