Bug 1463705 – RAID RESHAPE: enable on in-use LVs

Bug 1463705 - RAID RESHAPE: enable on in-use LVs

Summary:	RAID RESHAPE: enable on in-use LVs

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	lvm2 (Show other bugs)
Sub Component:
Version:	7.5
Hardware:	x86_64 Linux

Priority	unspecified Severity unspecified
Target Milestone:	rc
Target Release:	---
Assigned To:	Heinz Mauelshagen
QA Contact:	cluster-qe@redhat.com
Docs Contact:

URL:
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Depends On:	1447812 1492250 1506342
Blocks:
	Show dependency tree / graph

Reported:	2017-06-21 10:18 EDT by Heinz Mauelshagen
Modified:	2018-04-10 11:21 EDT (History)
CC List:	11 users (show)

See Also:
Fixed In Version:	lvm2-2.02.175-3.el7
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:	1447812
Environment:
Last Closed:	2018-04-10 11:20:44 EDT
Type:	Bug
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHEA-2018:0853	None	None	None	2018-04-10 11:21 EDT

Groups: None (edit)

Comment 3 Heinz Mauelshagen 2017-06-21 10:24:01 EDT

We disabled reshaping of in-use RaidLVs in RHEL7.4 as of bz1447812 because of a potential data corruption on reshaping striped RAIDs.

This bz tracks enabling it again once the deadlock fix is in.

Comment 4 Jonathan Earl Brassow 2017-06-21 12:33:23 EDT

... but the increased functionality is scheduled for 7.5 and is not a testblocker.

Comment 7 Marian Csontos 2017-10-10 08:31:35 EDT

Heinz, is the deadlock fix mentioned in Comment 3 in? Should this be reenabled and tested?

Comment 8 Heinz Mauelshagen 2017-10-11 09:12:52 EDT

(In reply to Marian Csontos from comment #7)
> Heinz, is the deadlock fix mentioned in Comment 3 in? Should this be
> reenabled and tested?

Yes.

LVM2 enabled reshaping of in-use LV again with
commit 6685460f5a918393edcde50d11f5cefb3a259df8.

Comment 12 Corey Marthaler 2017-11-27 15:48:56 EST

Verified that online in-use reshape/takeover is again enabled in the latest lvm rpms. 

3.10.0-799.el7.x86_64
lvm2-2.02.176-4.el7    BUILT: Wed Nov 15 04:21:19 CST 2017


That said the following 7.4 issues are again back as 7.5 regressions.

bug 1514539 kernel Deadlock in reshape on single core machine
bug 1514500 kernel RAID TAKEOVER: "divide error" panic during raid0_meta -> raid10 attempt
bug 1514215 lvm2   RAID RESHAPE: potential for data corruption when adding striped raid images to offline volumes

Comment 15 errata-xmlrpc 2018-04-10 11:20:44 EDT

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2018:0853

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