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Bug 1283072

Summary:	cold-plugged DIMM can't be unplugged on the first unplug request
Product:	Red Hat Enterprise Linux 7	Reporter:	Jan Kurik <jkurik>
Component:	qemu-kvm-rhev	Assignee:	Igor Mammedov <imammedo>
Status:	CLOSED ERRATA	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	unspecified	Docs Contact:
Priority:	high
Version:	7.2	CC:	hhuang, huding, imammedo, jen, juzhang, mrezanin, sherold, virt-maint, xfu, yuhuang
Target Milestone:	rc	Keywords:	ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	qemu-kvm-rhev-2.3.0-31.el7_2.2	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1278894	Environment:
Last Closed:	2015-12-07 21:43:28 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:	1278894
Bug Blocks:

Description Jan Kurik 2015-11-18 07:40:09 UTC

This bug has been copied from bug #1278894 and has been proposed
to be backported to 7.2 z-stream (EUS).

Comment 3 Yumei Huang 2015-11-19 08:57:59 UTC

Reproduce:
kernel: 3.10.0-329.el7.x86_64
qemu: qemu-kvm-rhev-2.3.0-29.el7

steps:
1. start a guest:
/usr/libexec/qemu-kvm -m 4G,slots=8,maxmem=32G rhel72.img  -object memory-backend-ram,id=m0,size=128M -device pc-dimm,id=dimm0,memdev=m0  -monitor stdio
2. after guest booted do unplug in monitor:
   (qemu)device_del dimm0

Guest  print on console:
--
ACPI: \_SB_.MP00: ACPI_NOTIFY_DEVICE_CHECK event
acpi PNP0C80:00: Already enumerated
--
and DIMM isn't unplugged.

So the bug is reproduced on above environment. 


Reverify:
kernel: 3.10.0-331.el7.x86_64
qemu-kvm: qemu-kvm-rhev-2.3.0-31.el7_2.2

With same steps as above, the DIMM is unplugged. 
So the bug is fixed.

Comment 4 Yumei Huang 2015-11-23 07:01:59 UTC

Reverify:
kernel: 3.10.0-327.3.1.el7.x86_64
qemu-kvm: qemu-kvm-rhev-2.3.0-31.el7_2.3

QE test on above environment with same steps as comment 3, the DIMM is unplugged. 
So the bug is fixed.

Comment 9 errata-xmlrpc 2015-12-07 21:43:28 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.

https://rhn.redhat.com/errata/RHBA-2015-2555.html