Bug 1566587 - Unable to resize image with preallocation=full mode [rhel-7.5.z]
Summary: Unable to resize image with preallocation=full mode [rhel-7.5.z]
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: qemu-kvm-rhev
Version: 7.5
Hardware: Unspecified
OS: Unspecified
Target Milestone: rc
: ---
Assignee: Max Reitz
QA Contact: Ping Li
: 1537985 (view as bug list)
Depends On: 1549231
TreeView+ depends on / blocked
Reported: 2018-04-12 14:57 UTC by Oneata Mircea Teodor
Modified: 2018-05-10 16:06 UTC (History)
17 users (show)

Fixed In Version: qemu-kvm-rhev-2.10.0-21.el7_5.2
Doc Type: If docs needed, set a value
Doc Text:
Clone Of: 1549231
Last Closed: 2018-05-10 16:04:49 UTC
Target Upstream Version:

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:1369 0 None None None 2018-05-10 16:06:08 UTC

Description Oneata Mircea Teodor 2018-04-12 14:57:32 UTC
This bug has been copied from bug #1549231 and has been proposed to be backported to 7.5 z-stream (EUS).

Comment 2 Miroslav Rezanina 2018-04-13 11:24:34 UTC
Fix included in qemu-kvm-rhev-2.10.0-21.el7_5.2

Comment 4 Tingting Mao 2018-04-17 04:43:46 UTC
Verified the issue with below packages and steps.
Package version:

1. Preallocate with mode off, falloc and full in turn
1.1 Create image and resize with preallocation=off mode
# qemu-img create -f raw test1.img 5G
# qemu-img resize -f raw --preallocation=off test1.img +1G
1.2 Resize again with preallocation=falloc mode
# qemu-img resize -f raw --preallocation=falloc test1.img +1G
1.3 Resize with preallocation=full last
# qemu-img resize -f raw --preallocation=full test1.img +1G
1.4 Check the result
# qemu-img map --output=json test1.img
[{ "start": 0, "length": 7516192768, "depth": 0, "zero": true, "data": false, "offset": 0},
{ "start": 7516192768, "length": 1073741824, "depth": 0, "zero": false, "data": true, "offset": 7516192768}

2. Preallocate with mode off and full.
2.1 Create image and resize with preallocation=off
# qemu-img create -f raw test2.img 5G
# qemu-img resize -f raw --preallocation=off test2.img +1G
2.2 Resize image with preallocation=full last
# qemu-img resize -f raw --preallocation=full test2.img +1G
2.3 Check the result
# qemu-img map --output=json test2.img
[{ "start": 0, "length": 6442450944, "depth": 0, "zero": true, "data": false, "offset": 0},
{ "start": 6442450944, "length": 1073741824, "depth": 0, "zero": false, "data": true, "offset": 6442450944}]

3. Repeat to preallocate with mode full
3.1 Create image and resize with preallocation=full
# qemu-img create -f raw test3.img 5G
# qemu-img resize -f raw --preallocation=full test3.img +1G
3.2 Resize image with preallocation=full again
# qemu-img resize -f raw --preallocation=full test3.img +1G
3.3 Check the result
# qemu-img map --output=json test3.img
[{ "start": 0, "length": 5368709120, "depth": 0, "zero": true, "data": false, "offset": 0},
{ "start": 5368709120, "length": 2147483648, "depth": 0, "zero": false, "data": true, "offset": 5368709120}]

Comment 5 Daniel Berrangé 2018-04-17 13:45:11 UTC
*** Bug 1537985 has been marked as a duplicate of this bug. ***

Comment 8 errata-xmlrpc 2018-05-10 16:04:49 UTC
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.


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