Thanks for the effort to try to reproduce this. Yes, vmhost_net is loaded.
ubuntu5# lsmod Module Size Used by vhost_net 31873 3 macvtap 18293 1 vhost_net macvlan 19002 1 macvtap ipmi_devintf 17521 0 ipmi_si 52889 0 ipmi_msghandler 45243 2 ipmi_devintf,ipmi_si ip6table_filter 12815 0 ip6_tables 27207 1 ip6table_filter ebtable_nat 12807 0 ebtables 30671 1 ebtable_nat ipt_MASQUERADE 12759 3 iptable_nat 13182 1 nf_nat 25254 2 ipt_MASQUERADE,iptable_nat nf_conntrack_ipv4 14480 4 iptable_nat,nf_nat nf_defrag_ipv4 12729 1 nf_conntrack_ipv4 xt_state 12578 1 nf_conntrack 82633 5 ipt_MASQUERADE,iptable_nat,nf_nat,nf_conntrack_ipv4,xt_state ipt_REJECT 12541 4 xt_CHECKSUM 12549 2 iptable_mangle 12695 1 xt_tcpudp 12603 10 iptable_filter 12810 1 ip_tables 26995 3 iptable_nat,iptable_mangle,iptable_filter x_tables 29711 12 ip6table_filter,ip6_tables,ebtables,ipt_MASQUERADE,iptable_nat,xt_state,ipt_REJECT,xt_CHECKSUM,iptable_mangle,xt_tcpudp,iptable_filter,ip_tables bridge 90446 0 stp 12931 1 bridge llc 14552 2 bridge,stp bonding 107986 0 vesafb 13797 1 kvm_amd 55604 7 kvm 414070 1 kvm_amd dm_multipath 22828 0 scsi_dh 14554 1 dm_multipath ghash_clmulni_intel 13180 0 aesni_intel 51037 0 cryptd 20403 2 ghash_clmulni_intel,aesni_intel aes_x86_64 17208 1 aesni_intel amd64_edac_mod 23904 0 microcode 22803 0 edac_core 52451 6 amd64_edac_mod psmouse 95552 0 sp5100_tco 13697 0 edac_mce_amd 23303 1 amd64_edac_mod i2c_piix4 13167 0 joydev 17457 0 serio_raw 13215 0 fam15h_power 13119 0 k10temp 13126 0 mac_hid 13205 0 w83627ehf 42929 0 hwmon_vid 12783 1 w83627ehf lp 17759 0 parport 46345 1 lp xfs 837979 6 hid_generic 12493 0 usbhid 46947 0 hid 100366 2 hid_generic,usbhid r8169 61650 0 qla2xxx 471919 0 pata_atiixp 13204 0 scsi_transport_fc 58962 1 qla2xxx igb 129237 0 scsi_tgt 20065 1 scsi_transport_fc e1000e 199114 0 arcmsr 32514 6 dca 15130 1 igb ** Attachment added: "vm2.xml" https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/1079212/+attachment/3443961/+files/vm2.xml -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1079212 Title: network slow when 2 VMs using virtio net bridged to same pyhs. network device on kvm host To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079212/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
