| Summary: | windows guest can not ping ext host using packet size 65500 when using rtl8139 and vhost is on | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | yunpingzheng <yunzheng> |
| Component: | qemu-kvm | Assignee: | Yvugenfi <yvugenfi> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.0 | CC: | acathrow, dfleytma, hhuang, juzhang, michen, rhod, shuang, sluo, virt-maint, yunzheng |
| 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: | 2014-08-19 07:54:12 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: | |
|
Description
yunpingzheng
2013-08-22 09:44:50 UTC
Please retest with latest RHEL7.0 kernel. Hi Sibiao, Can you have a try this? Best Regards, Junyi (In reply to yunpingzheng from comment #0) > Description of problem: > when boot a windows guest with rtl8139 and vhost=on. > can not ping ext host with packet size 65500(the max packet size support is > 63632) > when ping host that vm is runing can ping with packet size 65500. > > when using e1000 and virtio_net it works ok > > test on rhel6.4 host it works ok. > > Version-Release number of selected component (if applicable): > host: RHEL.7 > kernel-3.10.0-2.el7.x86_64 > qemu-kvm-1.5.2-3.el7.x86_64 > > guest: any windows guest. > > How reproducible: > 100% > > Steps to Reproduce: > 1. boot guest wit rtl8139 nic, and vhost=on > 2. from an ext host ping the guest > #ping -s 65507 $ip_win_guest > 3. in guest ping the ext host > # ping -l 65500 $ext_host_ip > 4. in guest ping the host > #ping -l 65500 $host_ip. > > Actual results: > in step 3 and step 4, ping timeout. when using -l 63632 it works, 63233 it > can not works. > > Expected results: > > all ping should works > > Additional info: > qemu_cmd: > /usr/libexec/qemu-kvm -M pc -name vm0 \ > -chardev socket,id=qmp_monitor1,path=/tmp/qmp_monitor1,server,nowait \ > -mon chardev=qmp_monitor1,mode=control \ > -drive > file=/mnt/windows/win8-64.qcow2,index=0,if=none,id=drive-virtio-disk1, > media=disk,cache=none,snapshot=on,format=qcow2,aio=native \ > -device > virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,id=virtio-disk1 \ > -drive > file=/home/kvm_autotest_root/iso/windows/winutils.iso,if=none,id=iso1, > media=cdrom,format=raw \ > -device ide-drive,bus=ide.1,unit=0,drive=iso1,id=cdrom1 \ > -device e1000,netdev=idKF4XM9,mac=9a:9b:68:24:99:73,id=ndev00idKF4XM9 \ > -netdev tap,id=idKF4XM9,vhost=on,script=qemu-ifup-switch \ > -smp 4,cores=2,threads=1,sockets=4,maxcpus=255 \ > -m 4096 -vnc :0 -monitor stdio -boot order=cdn,once=c,menu=on > > host nic: > 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network > Connection (rev 04) Retried with the same testing on the latest kernel version which did not hit it any more, all the ping works successfully. host info: # uname -r && rpm -q qemu-kvm-rhev && rpm -q seabios 3.10.0-145.el7.x86_64 qemu-kvm-rhev-2.1.0-2.el7.x86_64 seabios-1.7.5-4.el7.x86_64 guest info: win7 64bit host nic info: # lspci | grep Ether 00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04) Best Regards, sluo Closing based on comment #6. Thanks! |