Release Notes

Dell EMC Express Flash Enterprise NVMe CD6/CM6
device is not detected by the kernel
Description:
Dell EMC Express Flash Enterprise NVMe CD6/CM6 device is not detected by the operating system
when connected to a Dell EMC PowerEdge server which runs on a Red Hat Enterprise Linux.
Applies to: Red Hat Enterprise Linux 7.6 and later
Workwround:
Use the command-line parameter nr_cpus=255 during and after the installation, only if the number of
processors in the system is greater than or equal to 256.
Solution:
The issue is fixed in RHEL 7.9 z-stream kernel version kernel-3.10.0-1160.13.1.el7 and later. For more
information, see https://access.redhat.com/solutions/5691581.
Systems
affected:
Dell EMC PowerEdge C6525, Dell EMC PowerEdge R6525, and Dell EMC PowerEdge R7525.
Tracking number: 182052
Dell EMC PowerEdge Express Flash Enterprise NVMe
Agnostic (AGN) device is not detected by the
operating system
Description:
The Dell EMC PowerEdge Express Flash Enterprise NVMe Agnostic (AGN) device is not detected by the
operating system when it is connected to a Dell EMC PowerEdge server running Red Hat Enterprise Linux
7.7 and later.
Applies to: Red Hat Enterprise Linux 7.7 and later
Workaround: Use the command-line parameter nr_cpus=255 during and after the installation as a workaround for
this issue only if the number of processors in the system is greater than or equal to 256.
Solution: This issue is resolved in Red Hat Enterprise Linux 7.9.
Systems
affected:
Dell EMC PowerEdge C6525, PowerEdge R6525, and PowerEdge R7525
Tracking number: 166739
IO_PAGE_FAULT messages are displayed in dmesg for
PCIe Generation 4 devices
Description:
The following IO_PAGE_FAULT messages are observed in dmesg and /var/log/messages logs for PCIe
Generation 4 devices when input or output operations are performed:
AMD-Vi: Event logged [IO_PAGE_FAULT device=21:00.0 domain=0x001e
address=0x00000000f2489000 flags=0x0000]
AMD-Vi: Event logged [IO_PAGE_FAULT device=21:00.0 domain=0x001e
address=0x00000000fbbcb000 flags=0x0000]
Applies to: Red Hat Enterprise Linux 7.8 and later
Workaround: It is required to pass the iommu=pt (pass-through) kernel command-line parameter on AMD EPYC
(Rome) processor-based servers with PCIe Generation 4 devices. For more information, see Red Hat
Enterprise Linux Knowledge Base article 5320571.
Solution: Issue is resolved in BIOS version 1.7.3 and later.
Fixes 13