Bug 861442

Summary:	dm-thin lacks discard support
Product:	Red Hat Enterprise Linux 6	Reporter:	Neil Wilson <neil>
Component:	kernel	Assignee:	Red Hat Kernel Manager <kernel-mgr>
Status:	CLOSED DUPLICATE	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.3	CC:	msnitzer
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-01-18 21:58:31 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Neil Wilson 2012-09-28 15:38:57 UTC

Description of problem:

dm-thin lacks support for BLKDISCARD in the current kernel version, which means that the partitions only ever grow and they can't be efficiently zeroed.


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

 2.6.32-279.9.1.el6


How reproducible:


Source code notes that discard support is missing in this technology preview.

Comment 2 RHEL Program Management 2012-12-14 08:24:58 UTC

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Comment 3 Mike Snitzer 2013-01-18 21:58:31 UTC

Discard support has been added to dm-thin in RHEL6.4.

*** This bug has been marked as a duplicate of bug 828955 ***