This does look resolved on WS2016 and Azure. However, SR-IOV is broken in another way now on WS2019.
Affected proposed kernels: - cosmic proposed - bionic proposed edge - 4.18 based. Tested this with cosmic linux-azure 4.18.0.1006.7 from proposed, same vhd: - SR-IOV with Mellanox CX3 works fine on WS2016, all testing has passed. - SR-IOV with Mellanox CX3/CX4 is broken on WS2019. These are the relevant log portions showing the issue when the kernel attempts to load the driver: dmesg: [ 21.059766] mlx4_core: Mellanox ConnectX core driver v4.0-0 [ 21.059775] mlx4_core: Initializing 9488:00:02.0 [ 21.191481] mlx4_core 9488:00:02.0: Detected virtual function - running in slave mode [ 21.191508] mlx4_core 9488:00:02.0: Sending reset [ 21.191602] mlx4_core 9488:00:02.0: Sending vhcr0 [ 21.193338] mlx4_core 9488:00:02.0: HCA minimum page size:512 [ 21.193804] mlx4_core 9488:00:02.0: Timestamping is not supported in slave mode [ 93.148028] mlx4_core 9488:00:02.0: communication channel command 0x5 (op=0x31) timed out [ 93.148031] mlx4_core 9488:00:02.0: device is going to be reset [ 93.171917] mlx4_core 9488:00:02.0: VF is sending reset request to Firmware [ 93.172584] mlx4_core 9488:00:02.0: VF Reset succeed [ 93.172585] mlx4_core 9488:00:02.0: device was reset successfully [ 93.195311] mlx4_core 9488:00:02.0: NOP command failed to generate MSI-X interrupt IRQ 24) [ 93.195312] mlx4_core 9488:00:02.0: Trying again without MSI-X [ 93.196258] mlx4_core 9488:00:02.0: Failed to close slave function [ 93.196866] mlx4_core: probe of 9488:00:02.0 failed with error -5 ---- syslog: Dec 4 14:35:18 ubuntu kernel: [ 21.059766] mlx4_core: Mellanox ConnectX core driver v4.0-0 Dec 4 14:35:18 ubuntu kernel: [ 21.059775] mlx4_core: Initializing 9488:00:02.0 Dec 4 14:35:18 ubuntu kernel: [ 21.191481] mlx4_core 9488:00:02.0: Detected virtual function - running in slave mode Dec 4 14:35:18 ubuntu kernel: [ 21.191508] mlx4_core 9488:00:02.0: Sending reset Dec 4 14:35:18 ubuntu kernel: [ 21.191602] mlx4_core 9488:00:02.0: Sending vhcr0 Dec 4 14:35:18 ubuntu kernel: [ 21.193338] mlx4_core 9488:00:02.0: HCA minimum page size:512 Dec 4 14:35:18 ubuntu kernel: [ 21.193804] mlx4_core 9488:00:02.0: Timestamping is not supported in slave mode Dec 4 14:35:18 ubuntu kernel: [ 93.148028] mlx4_core 9488:00:02.0: communication channel command 0x5 (op=0x31) timed out Dec 4 14:35:18 ubuntu kernel: [ 93.148031] mlx4_core 9488:00:02.0: device is going to be reset Dec 4 14:35:18 ubuntu kernel: [ 93.171917] mlx4_core 9488:00:02.0: VF is sending reset request to Firmware Dec 4 14:35:18 ubuntu kernel: [ 93.172584] mlx4_core 9488:00:02.0: VF Reset succeed Dec 4 14:35:18 ubuntu kernel: [ 93.172585] mlx4_core 9488:00:02.0: device was reset successfully Dec 4 14:35:18 ubuntu kernel: [ 93.195311] mlx4_core 9488:00:02.0: NOP command failed to generate MSI-X interrupt IRQ 24) Dec 4 14:35:18 ubuntu kernel: [ 93.195312] mlx4_core 9488:00:02.0: Trying again without MSI-X Dec 4 14:35:18 ubuntu kernel: [ 93.196258] mlx4_core 9488:00:02.0: Failed to close slave function Dec 4 14:35:18 ubuntu kernel: [ 93.196866] mlx4_core: probe of 9488:00:02.0 failed with error -5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1794477 Title: Accelerated networking (SR-IOV VF) broken in 18.10 daily To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794477/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
