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Oracle VM Guest processes are stuck in D state: "barrier or flush: disabled using persistent grants" (Doc ID 2019115.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle VM - Version 3.2.1 and later
Linux x86-64

Symptoms

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

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

Cause

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