From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: [RFC V2 PATCH 0/4] Multiqueue support for tap and virtio-net/vhost Date: Mon, 25 Jun 2012 18:04:03 +0800 Message-ID: <20120625095059.8096.49429.stgit@amd-6168-8-1.englab.nay.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: krkumar2@in.ibm.com, habanero@linux.vnet.ibm.com, aliguori@us.ibm.com, rusty@rustcorp.com.au, mst@redhat.com, mashirle@us.ibm.com, qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org, tahm@linux.vnet.ibm.com, jwhan@filewood.snu.ac.kr, akong@redhat.com Cc: kvm@vger.kernel.org List-Id: virtualization@lists.linuxfoundation.org Hello all: This seires is an update of last version of multiqueue support to add multiqueue capability to both tap and virtio-net. Some kinds of tap backends has (macvatp in linux) or would (tap) support multiqueue. In such kind of tap backend, each file descriptor of a tap is a qeueu and ioctls were prodived to attach an exist tap file descriptor to the tun/tap device. So the patch let qemu to use this kind of backend, and let it can transmit and receving packets through multiple file descriptors. Patch 1 introduce a new help to get all matched options, after this patch, we could pass multiple file descriptors to a signle netdev by: qemu -netdev tap,id=hn0,fd=10,fd=11,... Patch 2 introduce generic helpers in tap to attach or detach a file descriptor from a tap device, emulated nics could use this helper to enable/disable queues. Patch 3 modifies the NICState to allow multiple VLANClientState to be stored in it, with this patch, qemu has basic support of multiple capable tap backend. Patch 4 converts virtio-net/vhost to be multiple capable. The vhost device were created per tx/rx queue pairs as usual. Changes from V1: - rebase to the latest - fix memory leak in parse_netdev - fix guest notifiers assignment/de-assignment - changes the command lines to: qemu -netdev tap,queues=2 -device virtio-net-pci,queues=2 TODO: - netdev_add - bridge helper for multiple queue backend References: - V1 http://comments.gmane.org/gmane.comp.emulators.qemu/100481 Please review and comments. --- Jason Wang (4): option: introduce qemu_get_opt_all() tap: multiqueue support net: multiqueue support virtio-net: add multiqueue support hw/dp8393x.c | 2 hw/mcf_fec.c | 2 hw/qdev-properties.c | 33 +++- hw/qdev.h | 3 hw/vhost.c | 58 ++++-- hw/vhost.h | 1 hw/vhost_net.c | 7 + hw/vhost_net.h | 2 hw/virtio-net.c | 461 +++++++++++++++++++++++++++++++++----------------- hw/virtio-net.h | 3 net.c | 62 ++++++- net.h | 16 +- net/tap-aix.c | 13 + net/tap-bsd.c | 13 + net/tap-haiku.c | 13 + net/tap-linux.c | 55 ++++++ net/tap-linux.h | 3 net/tap-solaris.c | 13 + net/tap-win32.c | 11 + net/tap.c | 189 +++++++++++++------- net/tap.h | 7 + qemu-option.c | 19 ++ qemu-option.h | 2 23 files changed, 714 insertions(+), 274 deletions(-) -- Signature