On Thu, Jan 16, 2014 at 08:55:53AM +0000, WANG Cheng D wrote: > Dear Daniel, > > The thirty-party PCIe card is based on the Xilinx’ FPGA which is off the > shelf, the main features are as follows: > 1) x8 Gen3, 8Gb/s per lane/direction > 2) MSI and legacy interrupt support > 3) Scatter-gather packet DMA engine provide by Northwest Logic > We hope multiple Linux Containers to access the PCIe card in time division > mode, for example, during slot 1, lxc1 read/write the PCIe card; during slot > 2, lxc2 read/write the PCIe card. > Taking reading operation (data flows from PCIe card to host memory) as > example, in native mode, the PCIe driver should tell PCIe card the host > memory address where to store the incoming data from PCIe card. With this > address, the PCIe card will transmit the data to host memory itself. > In container case, the problem is how application running in the container > knows the expected host memory address. > I wonder if we can have a process running in the which solely operates the > PCIe card, all the containers will send/receive data to this process via > socket.
Ok, so from the LXC driver POV I guess this card is accessed via some special device node with ioctls or something ? If so then you can just expose the device node to as many containers as you like at the same time without restrictions. http://libvirt.org/formatdomain.html#elementsHostDevCaps Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ libvirt-users mailing list libvirt-users@redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users
