Bug 985662

Summary:	guest cant get ip address after resume from s4 with assigned vf
Product:	Red Hat Enterprise Linux 6	Reporter:	mazhang <mazhang>
Component:	qemu-kvm	Assignee:	Hai Huang <hhuang>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.5	CC:	acathrow, amit.shah, bsarathy, chayang, flang, juzhang, michen, mkenneth, qiguo, qzhang, virt-maint
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:	2014-06-05 22:15:43 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:
Bug Depends On:
Bug Blocks:	912287

Description mazhang 2013-07-18 04:06:55 UTC

Description of problem:
assign a vf to guest, boot up guest then suspend to disk, after resume guest cant get ip address, try restart network and dhclient , also cant get ip, but if reboot guest network will works well

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

host configuration:
qemu-kvm-0.12.1.2-2.378.el6.x86_64
2.6.32-398.el6.x86_64
Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)
#lspci -v -s 06:10.2
06:10.2 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function (rev 01)
	Subsystem: Intel Corporation Device 7a11
	Flags: bus master, fast devsel, latency 0
	[virtual] Memory at df404000 (64-bit, non-prefetchable) [size=16K]
	[virtual] Memory at df504000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [70] MSI-X: Enable+ Count=3 Masked-
	Capabilities: [a0] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
	Kernel driver in use: pci-stub
	Kernel modules: ixgbevf


guest:
RHEL6.5-20130712.n.0
2.6.32-398.el6.x86_64


How reproducible:
100%

Steps to Reproduce:
1.Unbind a physical nic device from host (VF)
#echo "8086 10ed" >/sys/bus/pci/drivers/pci-stub/new_id 
#echo 0000:06:10.2 >/sys/bus/pci/devices/0000\:06\:10.2/driver/unbind 
#echo 0000:06:10.2 >/sys/bus/pci/drivers/pci-stub/bind

2.Boot up guest with the vf
/usr/libexec/qemu-kvm \
-M pc \
-cpu SandyBridge \
-m 2G \
-smp 2,sockets=1,cores=2,threads=1,maxcpus=16 \
-enable-kvm \
-name rhel6u5 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67170 \
-k en-us \
-rtc base=localtime,clock=host,driftfix=slew \
-nodefaults \
-monitor stdio \
-qmp tcp:0:6666,server,nowait \
-boot menu=on \
-bios /usr/share/seabios/bios.bin \
-vga qxl \
-spice port=5900,disable-ticketing \
-global PIIX4_PM.disable_s3=0 \
-global PIIX4_PM.disable_s4=0 \
-drive file=/home/rhel6u5.raw,if=none,id=drive-virtio-disk0,format=raw,cache=none,werror=stop,rerror=stop,aio=threads \
-device virtio-blk-pci,scsi=off,bus=pci.0,drive=drive-virtio-disk0,id=virtio-disk0 \
-device pci-assign,host=06:10.2,id=hostnet \

3. do s4
#echo disk >/sys/power/state

4. after qemu quit boot up guest again, and check guest network.


Actual results:
cant get ip address

Expected results:
can get ip address, network works well.

Additional info:

Comment 2 langfang 2013-07-18 10:15:46 UTC

Windows guest (2008r2-64) after S3/S4 have same problem.

Test Version:

# uname -r 
2.6.32-398.el6.x86_64
# rpm -q qemu-kvm
qemu-kvm-0.12.1.2-2.378.el6.x86_64

Guest:win2008r2-64

Comment 4 mazhang 2013-09-11 09:57:15 UTC

Can not hit this problem with qemu-kvm-0.12.1.2-2.400.el6.x86_64

host:
RHEL6.5-20130905.1
qemu-kvm-0.12.1.2-2.400.el6.x86_64

[root@intel-e5530-8-2 ~]# lspci -v -s 06:10.1
06:10.1 Ethernet controller: Intel Corporation 82576 Virtual Function (rev 01)
	Subsystem: Intel Corporation Device a03c
	Flags: bus master, fast devsel, latency 0
	[virtual] Memory at dd440000 (64-bit, non-prefetchable) [size=16K]
	[virtual] Memory at dd460000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [70] MSI-X: Enable+ Count=3 Masked-
	Capabilities: [a0] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
	Kernel driver in use: pci-stub
	Kernel modules: igbvf

guest:
RHEL6.5-20130905.1

CLI:
/usr/libexec/qemu-kvm \
-M pc \
-cpu SandyBridge \
-m 2G \
-smp 4,sockets=2,cores=2,threads=1,maxcpus=16 \
-enable-kvm \
-name rhel6 \
-uuid 990ea161-6b67-47b2-b803-19fb01d30d12 \
-smbios type=1,manufacturer='Red Hat',product='RHEV Hypervisor',version=el6,serial=koTUXQrb,uuid=feebc8fd-f8b0-4e75-abc3-e63fcdb67170 \
-k en-us \
-rtc base=localtime,clock=host,driftfix=slew \
-nodefaults \
-monitor stdio \
-qmp tcp:0:6666,server,nowait \
-boot menu=on \
-bios /usr/share/seabios/bios.bin \
-vga qxl \
-spice port=5900,disable-ticketing \
-global PIIX4_PM.disable_s3=0 \
-global PIIX4_PM.disable_s4=0 \
-drive file=/home/rhel6u5.raw,if=none,id=drive-virtio-disk0,format=raw,cache=none,werror=stop,rerror=stop,aio=threads \
-device virtio-blk-pci,scsi=off,bus=pci.0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=2 \
-device pci-assign,host=06:10.1,id=vf1,romfile=/home/808610ca.rom \

after resume from s4, guest network works well, can get ip addr.

Comment 6 Ademar Reis 2014-06-05 22:15:43 UTC

S3/S4 support is tech-preview in RHEL6 and it'll be promoted to fully supported
at some point, but only in RHEL7.

Therefore we're closing all S3/S4 related bugs in RHEL6. New bugs will be
considered only if they're regressions or break some important use-case or
certification.

RHEL7 is being more extensively tested and effort from QE is underway in
certifying that this particular bug is not present there.

Please reopen with a justification if you believe this bug should not be
closed. We'll consider them on a case-by-case basis following a best effort
approach.


Thank you.