Hi, all Recently, I have a VM with a vhost-user network card created by qemu 2.6.0. Once, I restart OpenVSwitch service and start this VM in the same time. I found qemu may probably crash with following stack:
(gdb) bt #0 0x00007f0f9179a5d7 in raise () from /usr/lib64/libc.so.6 #1 0x00007f0f9179bcc8 in abort () from /usr/lib64/libc.so.6 #2 0x000000000045a202 in kvm_io_ioeventfd_add () #3 0x000000000045cffc in address_space_add_del_ioeventfds () #4 0x000000000045fa0e in address_space_update_ioeventfds () #5 0x0000000000460f40 in memory_region_transaction_commit () #6 0x0000000000461ce5 in memory_region_add_eventfd () #7 0x000000000066a1e5 in virtio_pci_set_host_notifier_internal () #8 0x00000000004ae08a in vhost_dev_enable_notifiers () #9 0x0000000000492743 in vhost_net_start_one () #10 0x00000000004930bf in vhost_net_start () #11 0x000000000048efd4 in virtio_net_vhost_status () #12 0x000000000048f16a in virtio_net_set_status () #13 0x0000000000686bcd in qmp_set_link () #14 0x000000000068dcc3 in net_vhost_user_event () #15 0x000000000051f043 in tcp_chr_new_client () #16 0x000000000051f10f in qemu_chr_socket_connected () #17 0x000000000073cb10 in qio_task_complete () #18 0x000000000073cb7b in gio_task_thread_result () #19 0x00007f0f929fb99a in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 #20 0x00000000006d2275 in os_host_main_loop_wait () #21 0x00000000006d2393 in main_loop_wait () #22 0x000000000052a0f2 in main_loop () #23 0x000000000041bcd3 in main () This seems a bug triggering when backend starts vhost_net and meanwhile the frontend rmmod/modprobe virtio-net. Is this a known issue or any patch can fix this? Thanks all~
