Known Issues

Workaround: Use the following command instead:

            

            
echo 0 > /sys/kernel/mm/hugepages/hugepages-<Size>/nr_hugepages
        

Description: On CentOS 7.6 with kernel 4.19, bringing up OVS bridge interface causes call traces:

WARNING: CPU: 5 PID: 14339 at kernel/rcu/tree_plugin.h:342 rcu_note_context_switch+0x48/0x538

Description: To reset or shut down the BlueField Arm, it is mandatory to specify the --sync 0 argument. For example:

            

            
mlxfwreset -d <device> -l 1 -t 4 --sync 0  r
        

Description: During BFB installation in NIC mode on BlueField-3, too much information is added into RShim log which fills it, causing the Linux installation progress log to not appear in the RShim log.

            

            
echo "DISPLAY_LEVEL 2" > /dev/rshim0/misc
cat /dev/rshim0/misc
        

Workaround: Monitor the BlueField-3 Arm's UART console to check whether BFB installation has completed or not for NIC mode.

            

            
[13:58:39] INFO: Installation finished
...
[14:01:53] INFO: Rebooting...
        

Workaround:

1. Fix root partition UUID in the /etc/fstab:

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   Copied!

               
   
               
   mount -o remount,rw /dev/nvme0n1p2 /
           

2. Get UUID:

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   # lsblk -o UUID /dev/nvme0n1p2
   UUID
   ae1d5e37-7aee-4234-984b-9a9203bfd182 
           

3. Update UUID in the /etc/fstab to match the one printed by lsblk:

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   UUID=ae1d5e37-7aee-4234-984b-9a9203bfd182  /           xfs     defaults                   0 1
           

Workaround: Set PCIE_HAS_VFIO=0 and PCIE_HAS_UIO=0 in /etc/rshim.conf and restart the RShim driver. Then re-run the mlxfwreset command.

If host Linux kernel lockdown is enabled, then manually unbind the RShim driver before mlxfwreset and bind it back after mlxfwreset:

            

            
echo "DROP_MODE 1" > /dev/rshim0/misc
mlxfwreset <arguments>
echo "DROP_MODE 0" > /dev/rshim0/misc
        

Description: UEFI synchronous exception is observed at address 0x479B7xxxx where the UEFI module names are not printed. See the following example:

            

            
ERR[UEFI]: PC=0x479B78480(B4000040 3900001F A94153F3 F94013F5)
ERR[UEFI]: PC=0x479B78480
ERR[UEFI]: PC=0x479B7E684
ERR[UEFI]: PC=0x47A0E93F4
ERR[UEFI]: PC=0x47A0E9608
        

Workaround: Run:

            

            
sudo dpkg-reconfigure locales
        

Description: On Debian 12, the first boot after BFB installation may fail with the following kernel panic:

            

            
[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000100 ]
        

Workaround: Reset the DPU using the RShim interface:

            

            
echo "SW_RESET 1" > /dev/rshim0/misc
        

Description: On Debian 12, /etc/init.d/openibd restart fails with the following error:

            

            
rmmod: ERROR: Module rdma_cm is in use by: nvme_rdma
        

Workaround: Run:

            

            
modprobe -r nvme_rdma; /etc/init.d/openibd restart
        

Description: On Debian 12, Arm ports remain in Legacy mode after multiple Arm reboot iterations. The following error message appears in /var/log/syslog:

            

            
mlnx_bf_configure[2601]: ERR: Failed to configure switchdev mode for 0000:03:00.0 after 61 retries
        

Workaround: Run:

            

            
$ echo SET_MODE_RETRY_NUM=300 >> /etc/mellanox/mlnx-bf.conf
$ reboot
        

Workaround: Create /etc/bf.cfg with the following lines, then run bfcfg to recreate the PXE boot entries:

            

            
BOOT0=DISK
BOOT1=NET-NIC_P0-IPV4
BOOT2=NET-NIC_P0-IPV6
BOOT3=NET-NIC_P1-IPV4
BOOT4=NET-NIC_P1-IPV6
BOOT5=NET-OOB-IPV4
BOOT6=NET-OOB-IPV6
        

Workaround: Use netplan configuration. For example:

            

            
# cat /etc/netplan/tmfifo_net0.yaml
network:
  version: 2
  renderer: networkd
  ethernets:
    tmfifo_net0:
      addresses:
      - 192.168.100.1/30
      dhcp4: false
        

Then run "netplan apply".

Description: After rebooting a BlueField-3 DPU running Rocky Linux 8.6 BFB, the kernel log shows the following error:

            

            
[    3.787135] mlxbf_gige MLNXBF17:00: Error getting PHY irq. Use polling instead
        

This message indicates that the Ethernet driver will function normally in all aspects, except that PHY polling is enabled.

Description: When trying to perform a PXE installation when UEFI Secure Boot is enabled, the following error messages may be observed:

            

            
error: shim_lock protocol not found.
error: you need to load the kernel first.
        

Workaround: Use ib_core module parameter netns_mode=0. For example:

            

            
echo "options ib_core netns_mode=0" >> /etc/modprobe.d/mlnx-bf.conf
        

Workaround: Set OPENSSL_CONF=/etc/ssl/openssl.cnf.orig before using the curl utility. For example:

            

            
# OPENSSL_CONF=/etc/ssl/openssl.cnf.orig curl -O https://tpo.pe/pathogen.vim
        

Description: The host may crash when the number of PCIe devices overflows the PCIe device address. According to the PCIe spec, the device address space is 8 bits in total—device (5 bits) and function (3 bits)—which means that the total number of devices cannot be more than 256.

The second PF maximum number of VFs is limited by the total number of additional PCIe devices that precedes it. By default, the preceding PCIe devices are 2 PFs + RShim DMA + 127 VFs of the first PF. This means that the maximum valid number of VFs for the second port will be 126.