VirtualBox

Ticket #4889 (closed defect: fixed)

Opened 5 years ago

Last modified 4 years ago

VM sporadically crashes with "Bus Error" on disk access

Reported by: nablaman Owned by:
Priority: major Component: virtual disk
Version: VirtualBox 3.0.4 Keywords:
Cc: Guest type: Linux
Host type: Linux

Description

I have an installation with 8 VBox VMs running on a Dell Poweredge machine. After weeks of operation, suddenly last night a couple of the VMs stopped functioning properly. When logging into the VMs using SSH and doing something that involved disk access (such as ls), all you get back in the console is "Bus Error". There are some ATA problems reported in the VBox.log, so I'm guessing it has something to do with the storage subsystem. I hope someone can make sense of the log.

Attachments

VBox.log Download (68.7 KB) - added by nablaman 5 years ago.

Change History

Changed 5 years ago by nablaman

comment:1 Changed 4 years ago by aeichner

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

We had some bad experience with the host I/O cache on Linux. If the host experiences a high I/O load it happens that requests can take up to 5 minutes. The Linux kernel has a default timeout of 30 seconds and tries to cancel the operation but that fails because the I/O thread is blocked and can't resume operation until the request completed. Iti is possible to turn of the host I/O cache for the VM since 3.2. This should fix the problem.

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