Bug 603990

Summary:	Default to cache=none for block devices
Product:	Red Hat Enterprise Linux 7	Reporter:	Amit Shah <amit.shah>
Component:	qemu-kvm	Assignee:	Paolo Bonzini <pbonzini>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	low
Version:	7.0	CC:	ehabkost, juzhang, kwolf, mjenner, mkenneth, pbonzini, syeghiay, tburke, virt-maint
Target Milestone:	rc
Target Release:	7.0
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-10-25 13:33:37 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	580954

Description Amit Shah 2010-06-15 05:42:20 UTC

Description of problem:

We recommend running qemu with 'cache=none' for block devices. Set the default to 'cache=none' so that libvirt, vdsm, virt-manager, cmd-line users, all don't have to explicitly do that.

Comment 1 RHEL Program Management 2010-06-15 06:02:59 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.

Comment 12 Paolo Bonzini 2012-10-25 13:33:37 UTC

Upstream now has cache=writeback as the default.  However, this is a non-issue for RHEL since we always go through libvirt.