Hi, This is the first attempt to add a new qemu nvme backend using in-kernel nvme target. Most code are ported from qemu-nvme and also borrow code from Hannes Reinecke's rts-megasas. It's similar as vhost-scsi, but doesn't use virtio. The advantage is guest can run unmodified NVMe driver. So guest can be any OS that has a NVMe driver. The goal is to get as good performance as vhost-scsi. But for now, peformance is poor. MMIO is the bottleneck. One improvment could be to use google's NVMe vendor extension that I send in another thread, aslo here: https://git.kernel.org/cgit/linux/kernel/git/mlin/linux.git/log/?h=nvme-google-ext Qemu side: http://www.minggr.net/cgit/cgit.cgi/qemu/log/?h=vhost-nvme.0 Kernel side also here: https://git.kernel.org/cgit/linux/kernel/git/mlin/linux.git/log/?h=vhost-nvme.0 Thanks for any comment, Ming _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
