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Hi all, These 2 patches added virtio-nvme to kernel and qemu, basically modified from virtio-blk and nvme code. As title said, request for your comments. Play it in Qemu with: -drive file=disk.img,format=raw,if=none,id=D22 \ -device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4 The goal is to have a full NVMe stack from VM guest(virtio-nvme) to host(vhost_nvme) to LIO NVMe-over-fabrics

Hi all, These 2 patches added virtio-nvme to kernel and qemu, basically modified from virtio-blk and nvme code. As title said, request for your comments. Play it in Qemu with: -drive file=disk.img,format=raw,if=none,id=D22 \ -device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4 The goal is to have a full NVMe stack from VM guest(virtio-nvme) to host(vhost_nvme) to LIO NVMe-over-fabrics

...en the drive is removed): [67720.177959] pciehp 0000:40:01.2:pcie004: Slot(238-1): Link Down [67720.178027] vfio-pci 0000:42:00.0: Relaying device request to user (#0) And naturally, inside of the Linux VM, we see the NVMe controller drop: [ 1203.491536] nvme nvme1: controller is down; will reset: CSTS=0xffffffff, PCI_STATUS=0xffff [ 1203.522759] blk_update_request: I/O error, dev nvme1n2, sector 33554304 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 [ 1203.560505] nvme 0000:01:0f.0: Refused to change power state, currently in D3 [ 1203.561104] nvme nvme1: Removing after probe failure statu...

...| 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 1bfef66..0a0fc48 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -251,6 +251,9 @@ static void nvmet_start_ctrl(struct nvmet_ctrl *ctrl) } ctrl->csts = NVME_CSTS_RDY; + + if (ctrl->start) + ctrl->start(ctrl->opaque); } static void nvmet_clear_ctrl(struct nvmet_ctrl *ctrl) diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 9335584..eac008b 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/n...

...... __o .... _-\<, .... (_)/(_) ---<( o ^ o )>--------------------------------------------------------------- Chris May EDS CSTS Renascence Center 248-528-4338 (8-224) 300 E. Big Beaver Rd. Unix: cmay01@csos.eds.com Troy, MI 48083 Lotus: lnuscsts.cmay01@eds.com fax: 248-528-4390 (8-224) MSmail: msustr11.cmay01@eds.com

...uters from the central file server (NetApp). I am new to samba and trying to have some feel whether it is possible and what kind of issues we can expect to face in this project. I appreciate any comment. -------------------------------------------------------------------------- Ivan Matousek, CSTS Email:matousek{at}cs{dot}sfu{dot}ca School of Computing Science Simon Fraser University Phone: (604) 291-4422 Burnaby, B.C. V5A 1S6 Canada Fax: (604) 291-3045

...[67720.177959] pciehp 0000:40:01.2:pcie004: Slot(238-1): Link Down > [67720.178027] vfio-pci 0000:42:00.0: Relaying device request to user (#0) > > And naturally, inside of the Linux VM, we see the NVMe controller drop: > [ 1203.491536] nvme nvme1: controller is down; will reset: > CSTS=0xffffffff, PCI_STATUS=0xffff > [ 1203.522759] blk_update_request: I/O error, dev nvme1n2, sector > 33554304 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 0 > [ 1203.560505] nvme 0000:01:0f.0: Refused to change power state, currently in D3 > [ 1203.561104] nvme nvme1: Removing after...

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

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

...7130: 19 49 47 44 4d 00 53 49 47 4e 40 08 53 49 5a 45 .IGDM.SIGN at .SIZE 7140: 20 4f 56 45 52 20 53 56 45 52 40 10 56 56 45 52 OVER SVER at .VVER 7150: 40 08 47 56 45 52 40 08 4d 42 4f 58 20 44 4d 4f @.GVER at .MBOX DMO 7160: 44 20 00 40 50 44 52 44 59 20 43 53 54 53 20 43 D . at PDRDY CSTS C 7170: 45 56 54 20 00 40 0a 44 49 44 4c 20 44 44 4c 32 EVT . at .DIDL DDL2 7180: 20 44 44 4c 33 20 44 44 4c 34 20 44 44 4c 35 20 DDL3 DDL4 DDL5 7190: 44 44 4c 36 20 44 44 4c 37 20 44 44 4c 38 20 43 DDL6 DDL7 DDL8 C 71a0: 50 44 4c 20 43 50 4c 32 20 43 50 4c 33 20 43 50 PDL CPL2 CPL3 C...