| Summary: | The md5sum value changed after migration between destination host and guest | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Xueqiang Wei <xuwei> |
| Component: | qemu-kvm | Assignee: | pagupta |
| Status: | CLOSED NOTABUG | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.8 | CC: | ailan, amit.shah, dgilbert, mdeng, michen, mkenneth, ngu, quintela, qzhang, rbalakri, shuang, virt-maint, xuwei, zhanghm.zhm, zhanghongming |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | x86_64 | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-01-30 12:05:10 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: | |
Downgrade to the below version also hit the issue. kernel-2.6.32-595.el6.x86_64 qemu-kvm-rhev-0.12.1.2-2.482.el6 Downgrade to the below version also hit the issue. It is not a regression bug. kernel-2.6.32-573.19.1.el6.x86_64 qemu-kvm-rhev-0.12.1.2-2.479.el6_7.3 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: