From mboxrd@z Thu Jan 1 00:00:00 1970 From: Linhaifeng Subject: Re: [PATCH] vhost: notify guest to fill buffer when there is no buffer Date: Fri, 6 Feb 2015 12:02:23 +0800 Message-ID: <54D43CCF.1000509@huawei.com> References: <1422527404-12424-1-git-send-email-haifeng.lin@huawei.com> <54CA29F4.8080108@huawei.com> <54CA3ABF.3010203@huawei.com> <82F45D86ADE5454A95A89742C8D1410E01C9FC50@shsmsx102.ccr.corp.intel.com> <54CDC1D3.9000806@huawei.com> <82F45D86ADE5454A95A89742C8D1410E01CA1DA3@shsmsx102.ccr.corp.intel.com> <54CF6BB3.7080002@huawei.com> <54D08AFA.2030404@huawei.com> <82F45D86ADE5454A95A89742C8D1410E01CA3197@shsmsx102.ccr.corp.intel.com> <54D0926D.9010304@huawei.com> <82F45D86ADE5454A95A89742C8D1410E01CA3873@shsmsx102.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Cc: "liuyongan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org" , "dev-VfR2kkLFssw@public.gmane.org" To: "Xu, Qian Q" , "Xie, Huawei" Return-path: In-Reply-To: <82F45D86ADE5454A95A89742C8D1410E01CA3873-E2R4CRU6q/6iAffOGbnezLfspsVTdybXVpNB7YpNyf8@public.gmane.org> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces-VfR2kkLFssw@public.gmane.org Sender: "dev" On 2015/2/4 9:38, Xu, Qian Q wrote: > 4. Launch the VM1 and VM2 with virtio device, note: you need use qemu version>2.1 to enable the vhost-user server's feature. Old qemu such as 1.5,1.6 didn't support it. > Below is my VM1 startup command, for your reference, similar for VM2. > /home/qemu-2.2.0/x86_64-softmmu/qemu-system-x86_64 -name us-vhost-vm1 -cpu host -enable-kvm -m 2048 -object memory-backend-file,id=mem,size=2048M,mem-path=/mnt/huge,share=on -numa node,memdev=mem -mem-prealloc -smp 2 -drive file=/home/img/dpdk1-vm1.img -chardev socket,id=char0,path=/home/dpdk-vhost/vhost-net -netdev type=vhost-user,id=mynet1,chardev=char0,vhostforce -device virtio-net-pci,mac=00:00:00:00:00:01, -nographic > > 5. Then in the VM, you can have the same operations as before, send packet from virtio1 to virtio2. > > Pls let me know if any questions, issues. Hi xie & xu When I try to start VM vhost-switch crashed. VHOST_CONFIG: read message VHOST_USER_SET_MEM_TABLE VHOST_CONFIG: mapped region 0 fd:19 to 0xffffffffffffffff sz:0xa0000 off:0x0 VHOST_CONFIG: mmap qemu guest failed. VHOST_CONFIG: read message VHOST_USER_SET_VRING_NUM VHOST_CONFIG: read message VHOST_USER_SET_VRING_BASE VHOST_CONFIG: read message VHOST_USER_SET_VRING_ADDR run_dpdk_vhost.sh: line 19: 1854 Segmentation fault ${RTE_SDK}/examples/vhost/build/app/vhost-switch -c 0x300 -n 4 --huge-dir /dev/hugepages -m 2048 -- -p 0x1 --vm2vm 2 --mergeable 0 --zero-copy 0 -- Regards, Haifeng