Oracle VM Guest processes are stuck in D state: "barrier or flush: disabled using persistent grants"

(Doc ID 2019115.1)

Last updated on OCTOBER 22, 2015

Applies to:

Oracle VM - Version 3.2.1 and later
Linux x86-64


VM guests are hanging while I/O are being initiated on Disks.

Processes are in D state, while in dmesg below message is visible:


Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms