The following are known limitations of this NVMe/virtio-blk SNAP software version.
| Ref # | Issue |
|---|---|
| – | Description: NVMeTCP XLIO is currently not supported when running 64K page size kernels on the DPU Arm cores (as is the case for CentOS 8.x, Rocky 8.x, or openEuler 20.x). |
| Workaround: N/A | |
| Keywords: 64K page size; NVMeTCP XLIO | |
| Discovered in version: 4.1.0 | |
| 3264154 | Description: NVMeTCP XLIO is not supported when running 64K page size kernels on the DPU Arm cores (such is the case with CentOS 8.x, Rocky 8.x, or openEuler 20.x). |
| Workaround: N/A | |
| Keywords: Page size; NVMeTCP XLIO | |
| Discovered in version: 4.1.0 | |
| – | Description: NVMe over RDMA full offload is not supported. |
| Workaround: N/A | |
| Keywords: NVMe over RDMA; support | |
| Discovered in version: 4.0.0 | |
| – | Description: SNAP is not supported on a host with Windows OS. |
| Workaround: N/A | |
| Keywords: Windows; OS; support | |
| Discovered in version: 4.0.0 |
OS Issues
The following are not BlueField SNAP limitations.
| Ref # | Issue |
|---|---|
| - | Description: RedHat/Centos 7.x does not handle "online" (post driver probe) namespace additions/removals correctly. |
Workaround: Use --quirks=0x2 option in snap_rpc.py nvme_controller_create. | |
| Keywords: NVMe; CentOS; RedHat; kernel | |
| Discovered in version: 4.1.0 | |
| - | Description: Some Windows drivers have experimental support for "online" (post driver probe) namespace additions/removal, although such support is not communicated with the device. |
Workaround: Use --quirks=0x1 option in snap_rpc.py nvme_controller_create. | |
| Keywords: NVMe; Windows | |
| Discovered in version: 4.1.0 | |
| - | Description: VMWare ESXi supports "online" (post driver probe) namespace additions/removal, only if “Namespace Management” is supported by controller. |
Workaround: Use --quirks=0x8 option in snap_rpc.py nvme_controller_create. | |
| Keywords: NVMe, ESXi | |
| Discovered in version: 4.1.0 | |
| - | Description: Ubuntu 22.04 does not support 500 VFs. |
| Workaround: N/A | |
| Keywords: Virtio-blk; kernel driver; Ubuntu 22.04 | |
| Discovered in version: 4.1.0 | |
| – | Description: Virtio-blk Linux kernel driver does not handle PCIe FLR events. |
| Workaround: N/A | |
| Keywords: Virtio-blk; kernel driver | |
| Discovered in version: 4.0.0 | |
| – | Description: A new virtio-blk Linux kernel driver (starting kernel 4.18) does not support hot-unplug during traffic. Since the kernel may self-generate spontaneous IOs, on rare occasions, an issue may happen even when no traffic is explicitly being run. |
| Workaround: N/A | |
| Keywords: Virtio-blk; kernel driver | |
| Discovered in version: 4.0.0 |
