View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001563 | channel: elrepo/el10 | kmod-mlx4 | public | 2025-09-18 14:07 | 2025-09-20 11:30 |
| Reporter | ap75 | Assigned To | pperry | ||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | resolved | Resolution | fixed | ||
| Summary | 0001563: mlx4 driver for el10 | ||||
| Description | RHEL 10 has removed the mlx4 driver from the kernel, as shown in this release note link: https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/10/html/10.0_release_notes/removed-features#removed-features-networking According to Azure documentation, different Azure hosts use different models of Mellanox physical NIC, and therefore Linux automatically determines whether to use the mlx4 or mlx5 driver. https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-how-it-works Therefore, Azure accelerated networking will not work with RHEL 10 based virtual machines unless an Azure host with mlx5 (instead of mlx4) driver is used, and this seems to be random. Would be great if mlx4 driver would be available in el10 as well, since Azure mlx4 based hardware is still in use. Thanks | ||||
| Tags | No tags attached. | ||||
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@ap75 While we are working on the kmod package, you may want to test-install our kernel-ml. The mlx4 driver is enabled there. |
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I have built kmod-mlx4 for el10 and have uploaded packages to our testing repository. The following should be available on our mirror sites shortly: kmod-mlx4-4.0-1.el10_0.elrepo.x86_64.rpm kmod-mlx4-4.0-1.el10_0.elrepo.src.rpm Please install and test with: dnf --enablerepo=elrepo-testing install kmod-mlx4 and please report back if the driver works for you. Thanks. |
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@toracat mlx4 in kernel-ml does work, thank you for the info! @pperry Thank you for this, I will test and report back. |
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@pperry The kmod-mlx4 for el10 works as well, please see below: 1. before installing kmod-mlx4 [code] [root@testvm ~]# dmesg | grep mlx4 [root@testvm ~]# [root@testvm ~]# ethtool -S eth0 | grep ' vf_' vf_rx_packets: 0 vf_rx_bytes: 0 vf_tx_packets: 0 vf_tx_bytes: 0 vf_tx_dropped: 0 [root@testvm ~]# [/code] 2. after installing kmod-mlx4 [code] [root@testvm ~]# dmesg | grep mlx4 [ 8.418623] mlx4_core: loading out-of-tree module taints kernel. [ 8.418684] mlx4_core: module verification failed: signature and/or required key missing - tainting kernel [ 8.468817] mlx4_core: Mellanox ConnectX core driver v4.0-0 [ 8.468892] mlx4_core: Initializing 82b7:00:02.0 [ 8.469567] mlx4_core 82b7:00:02.0: enabling device (0000 -> 0002) [ 8.487550] mlx4_core 82b7:00:02.0: Detected virtual function - running in slave mode [ 8.487621] mlx4_core 82b7:00:02.0: Sending reset [ 8.487742] mlx4_core 82b7:00:02.0: Sending vhcr0 [ 8.490491] mlx4_core 82b7:00:02.0: HCA minimum page size:512 [ 8.491160] mlx4_core 82b7:00:02.0: Timestamping is not supported in slave mode [ 9.686246] mlx4_en: Mellanox ConnectX HCA Ethernet driver v4.0-0 [ 9.687440] mlx4_en 82b7:00:02.0: Activating port:1 [ 9.709708] mlx4_en: 82b7:00:02.0: Port 1: Using 8 TX rings [ 9.709748] mlx4_en: 82b7:00:02.0: Port 1: Using 8 RX rings [ 9.710089] mlx4_en: 82b7:00:02.0: Port 1: Initializing port [ 9.711209] mlx4_core 82b7:00:02.0 eth1: joined to eth0 [ 11.650141] mlx4_en: eth1: Steering Mode 2 [ 11.672498] mlx4_en: eth1: Link Up [ 13.889755] mlx4_en: eth1: Close port called [ 14.269201] mlx4_en: eth1: Steering Mode 2 [ 14.291477] mlx4_en: eth1: Link Up [root@testvm ~]# [root@testvm ~]# ethtool -S eth0 | grep ' vf_' vf_rx_packets: 94 vf_rx_bytes: 15505 vf_tx_packets: 404 vf_tx_bytes: 127331 vf_tx_dropped: 0 [root@testvm ~]# [/code] 3. I have tested this with the kernel versions below, with both RHEL and Rocky Linux 6.12.0-55.25.1.el10_0.x86_64 in RHEL 10 6.12.0-55.30.1.el10_0.x86_64 in Rocky Linux 10 6.12.0-55.32.1.el10_0.x86_64 in Rocky Linux 10 6.12.0-55.33.1.el10_0.x86_64 in RHEL 10 All looks good! Thank you very much for this. Regards, |
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@ap75 Thank you for the feedback. I'll move kmod-mlx4 from testing to the main repo now. The the module stops working after RHEL updates (e.g, 10.0 to 10.1), please let us know as it may require a rebuild for newer kernel series. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2025-09-18 14:07 | ap75 | New Issue | |
| 2025-09-18 14:48 | toracat | Status | new => acknowledged |
| 2025-09-18 14:48 | toracat | Category | --elrepo--OTHER-- => kmod-mlx4 |
| 2025-09-19 00:57 | pperry | Assigned To | => pperry |
| 2025-09-19 00:57 | pperry | Status | acknowledged => assigned |
| 2025-09-19 12:15 | toracat | Note Added: 0010641 | |
| 2025-09-19 14:46 | pperry | Note Added: 0010642 | |
| 2025-09-19 15:11 | ap75 | Note Added: 0010643 | |
| 2025-09-19 16:01 | ap75 | Note Added: 0010644 | |
| 2025-09-20 11:30 | pperry | Note Added: 0010645 | |
| 2025-09-20 11:30 | pperry | Status | assigned => resolved |
| 2025-09-20 11:30 | pperry | Resolution | open => fixed |
