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docs(genimage): document InfiniBand driver defaults

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Vinícius Ferrão
2026-08-28 13:57:50 -03:00
parent ee18db925a
commit 01766a6c66
1 changed files with 7 additions and 3 deletions
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docs/source/guides/admin-guides/manage_clusters/common/deployment/install_new_kernel.rst
+7 -3
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@@ -84,9 +84,13 @@ The default driver list: ::
sels-ppc: tg3 e1000 e1000e igb ibmveth ehea be2net
sles-ppcle: scsi_mod libata scsi_tgt jbd2 mbcache crc16 virtio virtio_ring libahci crc-t10dif scsi_transport_srp af_packet ext3 ext4 virtio_pci virtio_blk scsi_dh ahci megaraid_sas sd_mod ibmvscsi
The Mellanox entries are conditional. ``genimage`` retains a real ``mlx_en``
module from the target kernel, otherwise uses ``mlx4_en`` when available, and
adds ``mlx5_core`` when available. Missing optional Mellanox modules are omitted.
The automatically added Mellanox entries are conditional. ``genimage`` retains
a real ``mlx_en`` module from the target kernel, otherwise uses ``mlx4_en`` when
available, and adds ``mlx5_core`` when available. Available ``mlx4_ib`` and
``mlx5_ib`` modules are also added. If either InfiniBand driver and ``ib_ipoib``
are available, ``ib_ipoib`` is added for IP over InfiniBand. Missing optional
Mellanox modules are omitted. Explicit ``netdrivers`` entries do not enable
other optional Mellanox defaults.
Note: With this approach, xCAT will search for the drivers in the rootimage. You need to make sure the drivers have been included in the rootimage before generating the initrd. You can install the drivers manually in an existing rootimage (using chroot) and run genimage again, or you can use a postinstall script to install drivers to the rootimage during your initial genimage run.