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Bug 2154127 - [RFE] Expose discard_granularity
Summary: [RFE] Expose discard_granularity
Keywords:
Status: CLOSED DUPLICATE of bug 1849570
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: libvirt
Version: 9.1
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Virtualization Maintenance
QA Contact: Han Han
URL:
Whiteboard:
Depends On: 2020998
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-12-15 22:22 UTC by Germano Veit Michel
Modified: 2023-03-01 14:12 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-03-01 14:12:41 UTC
Type: Feature Request
Target Upstream Version:
Embargoed:
pm-rhel: mirror+


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-142668 0 None None None 2022-12-15 22:28:49 UTC
Red Hat Knowledge Base (Solution) 6990677 0 None None None 2022-12-16 04:58:47 UTC

Description Germano Veit Michel 2022-12-15 22:22:42 UTC
Description of problem:

A fix for BZ202099 requires setting discard_granularity to > 8M (default 4k if unset) for the VM disks with discard support, otherwise the discard is just too slow and resource consuming for Windows guests.

Currently this is available only in qemu command line. Please consider adding this to libvirt domain definition so it can be set to a better value by customers and layered products.

Comment 2 Germano Veit Michel 2022-12-15 22:23:19 UTC
I found this, but it seems it was forgotten: https://patchew.org/Libvirt/20200616075438.5726-1-lma@suse.com/20200616075438.5726-2-lma@suse.com/

Comment 3 Germano Veit Michel 2022-12-15 22:24:39 UTC
(In reply to Germano Veit Michel from comment #0)
> A fix for BZ202099...

Typo, its BZ2020998

Comment 7 Peter Krempa 2023-03-01 14:12:41 UTC

*** This bug has been marked as a duplicate of bug 1849570 ***


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