Bug 1420939

Summary:	[RFE] Improved integration between XFS and thinp
Product:	[Community] LVM and device-mapper	Reporter:	Andy Grover <agrover>
Component:	lvm2	Assignee:	LVM Team <lvm-team>
lvm2 sub component:	Thin Provisioning	QA Contact:	cluster-qe <cluster-qe>
Status:	NEW ---	Docs Contact:
Severity:	unspecified
Priority:	unspecified	CC:	agk, anprice, bmarzins, bmr, heinzm, jbrassow, jonathan, lvm-team, msnitzer, prajnoha, thornber, zkabelac
Version:	unspecified	Flags:	rule-engine: lvm-technical-solution? rule-engine: lvm-test-coverage?
Target Milestone:	Fedora
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:
Bug Depends On:
Bug Blocks:	1420937

Description Andy Grover 2017-02-09 22:58:27 UTC

When one uses XFS on thinp, there are a number of issues that arise:

One is just that the 'df' utility doesn't return relevant information about the space actually available to the filesystem.

Two, there may not be sufficient coordination between the two layers when running low on space in the thin pool.

Three, it's not clear (at least to me) the degree which being on thinp affects XFS performance characteristics, and how efficient XFS is in resisting fragmentation and inefficient usage of thinp blocks. It would be good to analyze and possibly improve XFS's behavior in this area.

Comment 1 Fedora End Of Life 2017-02-28 11:14:10 UTC

This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle.
Changing version to '26'.

Comment 2 Fedora End Of Life 2018-05-03 08:03:37 UTC

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