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Bug 1894067

Summary: [Docs][4.4.3] NVDIMM persistence limitation
Product: Red Hat Enterprise Virtualization Manager Reporter: Milan Zamazal <mzamazal>
Component: DocumentationAssignee: rhev-docs <rhev-docs>
Status: CLOSED CURRENTRELEASE QA Contact: rhev-docs <rhev-docs>
Severity: low Docs Contact:
Priority: low    
Version: 4.4.2CC: apinnick, emarcus, lsurette, mhicks, srevivo
Target Milestone: ---Keywords: Documentation, EasyFix, NoDocsQEReview
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: docscope 4.5
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-03-16 12:28:47 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: Docs RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Milan Zamazal 2020-11-03 13:54:38 UTC 
Description of problem:

In addition to the NVDIMM limitations already documented as part of BZ 1879175, the following limitation should be added:

Data persistence cannot be guaranteed in case of a host crash unless the NVDIMM host device is in devdax mode.

Version-Release number of selected component (if applicable):

4.4.3

Additional info:

See https://github.com/qemu/qemu/blob/master/docs/nvdimm.txt, section Guest Data Persistence, for a more detailed explanation.

NVDIMM cannot be currently used in devdax mode on the host due to BZ 1855336.
Comment 2 Eli Marcus 2023-03-13 15:56:46 UTC 
PR https://github.com/oVirt/ovirt-site/pull/3138
Comment 3 Eli Marcus 2023-03-16 12:28:33 UTC 
merged PR