Known Issues
The following are known limitations of this NVMe/virtio-blk SNAP software version.
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Ref # |
Issue |
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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). |
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Workaround: N/A |
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Keywords: 64K page size; NVMeTCP XLIO |
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Discovered in version: 4.1.0 |
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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). |
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Workaround: N/A |
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Keywords: Page size; NVMeTCP XLIO |
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Discovered in version: 4.1.0 |
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Description: NVMe over RDMA full offload is not supported. |
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Workaround: N/A |
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Keywords: NVMe over RDMA; support |
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Discovered in version: 4.0.0 |
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Description: SNAP is not supported on a host with Windows OS. |
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Workaround: N/A |
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Keywords: Windows; OS; support |
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Discovered in version: 4.0.0 |
The following are not BlueField SNAP limitations.
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Ref # |
Issue |
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Description: RedHat/Centos 7.x does not handle "online" (post driver probe) namespace additions/removals correctly. |
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Workaround: Use --quirks=0x2 option in snap_rpc.py nvme_controller_create. |
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Keywords: NVMe; CentOS; RedHat; kernel |
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Discovered in version: 4.1.0 |
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Description: Some Windows drivers have experimental support for "online" (post driver probe) namespace additions/removal, although such support is not communicated with the device. |
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Workaround: Use --quirks=0x1 option in snap_rpc.py nvme_controller_create. |
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Keywords: NVMe; Windows |
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Discovered in version: 4.1.0 |
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Description: VMWare ESXi supports "online" (post driver probe) namespace additions/removal, only if “Namespace Management” is supported by controller. |
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Workaround: Use --quirks=0x8 option in snap_rpc.py nvme_controller_create. |
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Keywords: NVMe, ESXi |
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Discovered in version: 4.1.0 |
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Description: Ubuntu 22.04 does not support 500 VFs. |
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Workaround: N/A |
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Keywords: Virtio-blk; kernel driver; Ubuntu 22.04 |
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Discovered in version: 4.1.0 |
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Description: Virtio-blk Linux kernel driver does not handle PCIe FLR events. |
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Workaround: N/A |
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Keywords: Virtio-blk; kernel driver |
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Discovered in version: 4.0.0 |
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Description: A n ew 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. |
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Workaround: N/A |
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Keywords: Virtio-blk; kernel driver |
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Discovered in version: 4.0.0 |