Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Description of problem:
connect to host side virtio serial to read data on destination host after migration, the md5sum value changed between host and guest.
Version-Release number of selected component (if applicable):
kernel-2.6.32-595.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.483.el6
How reproducible:
3/3
Steps to Reproduce:
1. start guest A with virtio-serial
/usr/libexec/qemu-kvm \
-m 2048 \
-smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \
-cpu 'Penryn' \
-vga qxl \
-monitor stdio \
-device virtio-net-pci,mac=fa:f7:f8:5f:fa:5b,id=idn0VnaA,vectors=4,netdev=id8xJhp7,bus=pci.0,addr=06 \
-netdev tap,id=id8xJhp7,vhost=on \
-device virtio-scsi-pci,id=scsi1,bus=pci.0 \
-drive file=/home/autotest/client/tests/virt/shared/data/images/RHEL-Server-7.2-64-virtio-scsi.raw,id=drive-data-disk,if=none,cache=none,snapshot=off,format=raw,media=disk,aio=threads \
-device scsi-hd,id=data-disk,bus=scsi1.0,drive=drive-data-disk \
-spice port=8001,disable-ticketing,agent-mouse=on \
-device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=07 \
-chardev socket,id=channel0,path=/tmp/port0,server,nowait \
-device virtserialport,chardev=channel0,name=org.linux-kvm.port.0,bus=virtio-serial0.0,id=port0,nr=2 \
2. on the host, open the chardev but don't read from it.
[root@intel-q9400-4-1 staf-kvm]# python
Python 2.6.6 (r266:84292, May 22 2015, 08:34:51)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-15)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> sock = socket.socket(socket.AF_UNIX)
>>> sock.connect("/tmp/port0")
3. create 2G size a big file in guest
# dd if=/dev/zero of=2g bs=1M count=2000
send data from guest
#cat 2g >/dev/vport0p1
4. boot up dst :B guest
/usr/libexec/qemu-kvm \
-m 2048 \
-smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \
-cpu 'Penryn' \
-vga qxl \
-monitor stdio \
-device virtio-net-pci,mac=fa:f7:f8:5f:fa:5b,id=idn0VnaA,vectors=4,netdev=id8xJhp7,bus=pci.0,addr=06 \
-netdev tap,id=id8xJhp7,vhost=on \
-device virtio-scsi-pci,id=scsi1,bus=pci.0 \
-drive file=/home/autotest/client/tests/virt/shared/data/images/RHEL-Server-7.2-64-virtio-scsi.raw,id=drive-data-disk,if=none,cache=none,snapshot=off,format=raw,media=disk,aio=threads \
-device scsi-hd,id=data-disk,bus=scsi1.0,drive=drive-data-disk \
-spice port=8001,disable-ticketing,agent-mouse=on \
-device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=07 \
-chardev socket,id=channel0,path=/tmp/port0,server,nowait \
-device virtserialport,chardev=channel0,name=org.linux-kvm.port.0,bus=virtio-serial0.0,id=port0,nr=2 \
-incoming tcp:0:2222 \
5. migrate from A to B
(qemu)migrate -d tcp:ip:2222
6.start listener on B
#nc -U $host_socket > 2g-host
7. do md5sum for 2g and 2g-host
Actual results:
the md5sum value is different between 2g and 2g-host
Expected results:
the value should be same
Additional info:
What is the result if transfer data without migration?
There's a bug closed as wontfix:
Bug 677886 - MD5 of file is different from the original one after transferred via virtio serial
(In reply to Qunfang Zhang from comment #4)
> What is the result if transfer data without migration?
>
> There's a bug closed as wontfix:
>
> Bug 677886 - MD5 of file is different from the original one after
> transferred via virtio serial
The result is passed if follow the test steps in Bug 677886
(In reply to Qunfang Zhang from comment #4)
> What is the result if transfer data without migration?
>
> There's a bug closed as wontfix:
>
> Bug 677886 - MD5 of file is different from the original one after
> transferred via virtio serial
The result is passed if follow the test steps in Bug 677886
In Bug 677886, only transfer data via virtio serial, not contains the following steps:
2. on the host, open the chardev but don't read from it.
[root@intel-q9400-4-1 staf-kvm]# python
Python 2.6.6 (r266:84292, May 22 2015, 08:34:51)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-15)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> sock = socket.socket(socket.AF_UNIX)
>>> sock.connect("/tmp/port0")
5. migrate from A to B
(qemu)migrate -d tcp:ip:2222
(In reply to Xueqiang Wei from comment #6)
> (In reply to Qunfang Zhang from comment #4)
> > What is the result if transfer data without migration?
> >
> > There's a bug closed as wontfix:
> >
> > Bug 677886 - MD5 of file is different from the original one after
> > transferred via virtio serial
>
>
> The result is passed if follow the test steps in Bug 677886
>
> In Bug 677886, only transfer data via virtio serial, not contains the
> following steps:
>
> 2. on the host, open the chardev but don't read from it.
> [root@intel-q9400-4-1 staf-kvm]# python
> Python 2.6.6 (r266:84292, May 22 2015, 08:34:51)
> [GCC 4.4.7 20120313 (Red Hat 4.4.7-15)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import socket
> >>> sock = socket.socket(socket.AF_UNIX)
> >>> sock.connect("/tmp/port0")
Even then, the src will have some data in its buffers. After migration is successful, try this command on the same python prompt:
buffer = sock.recv(4096); print buffer
This should show some data that was cached on the src. If you concatenate the output on the dest with this output on the src, the files should match.
If that's not the case, please reopen.
Description of problem: connect to host side virtio serial to read data on destination host after migration, the md5sum value changed between host and guest. Version-Release number of selected component (if applicable): kernel-2.6.32-595.el6.x86_64 qemu-kvm-rhev-0.12.1.2-2.483.el6 How reproducible: 3/3 Steps to Reproduce: 1. start guest A with virtio-serial /usr/libexec/qemu-kvm \ -m 2048 \ -smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \ -cpu 'Penryn' \ -vga qxl \ -monitor stdio \ -device virtio-net-pci,mac=fa:f7:f8:5f:fa:5b,id=idn0VnaA,vectors=4,netdev=id8xJhp7,bus=pci.0,addr=06 \ -netdev tap,id=id8xJhp7,vhost=on \ -device virtio-scsi-pci,id=scsi1,bus=pci.0 \ -drive file=/home/autotest/client/tests/virt/shared/data/images/RHEL-Server-7.2-64-virtio-scsi.raw,id=drive-data-disk,if=none,cache=none,snapshot=off,format=raw,media=disk,aio=threads \ -device scsi-hd,id=data-disk,bus=scsi1.0,drive=drive-data-disk \ -spice port=8001,disable-ticketing,agent-mouse=on \ -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=07 \ -chardev socket,id=channel0,path=/tmp/port0,server,nowait \ -device virtserialport,chardev=channel0,name=org.linux-kvm.port.0,bus=virtio-serial0.0,id=port0,nr=2 \ 2. on the host, open the chardev but don't read from it. [root@intel-q9400-4-1 staf-kvm]# python Python 2.6.6 (r266:84292, May 22 2015, 08:34:51) [GCC 4.4.7 20120313 (Red Hat 4.4.7-15)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> sock = socket.socket(socket.AF_UNIX) >>> sock.connect("/tmp/port0") 3. create 2G size a big file in guest # dd if=/dev/zero of=2g bs=1M count=2000 send data from guest #cat 2g >/dev/vport0p1 4. boot up dst :B guest /usr/libexec/qemu-kvm \ -m 2048 \ -smp 2,maxcpus=2,cores=1,threads=1,sockets=2 \ -cpu 'Penryn' \ -vga qxl \ -monitor stdio \ -device virtio-net-pci,mac=fa:f7:f8:5f:fa:5b,id=idn0VnaA,vectors=4,netdev=id8xJhp7,bus=pci.0,addr=06 \ -netdev tap,id=id8xJhp7,vhost=on \ -device virtio-scsi-pci,id=scsi1,bus=pci.0 \ -drive file=/home/autotest/client/tests/virt/shared/data/images/RHEL-Server-7.2-64-virtio-scsi.raw,id=drive-data-disk,if=none,cache=none,snapshot=off,format=raw,media=disk,aio=threads \ -device scsi-hd,id=data-disk,bus=scsi1.0,drive=drive-data-disk \ -spice port=8001,disable-ticketing,agent-mouse=on \ -device virtio-serial-pci,id=virtio-serial0,max_ports=16,bus=pci.0,addr=07 \ -chardev socket,id=channel0,path=/tmp/port0,server,nowait \ -device virtserialport,chardev=channel0,name=org.linux-kvm.port.0,bus=virtio-serial0.0,id=port0,nr=2 \ -incoming tcp:0:2222 \ 5. migrate from A to B (qemu)migrate -d tcp:ip:2222 6.start listener on B #nc -U $host_socket > 2g-host 7. do md5sum for 2g and 2g-host Actual results: the md5sum value is different between 2g and 2g-host Expected results: the value should be same Additional info: