6 Linux Issues
This section describes important operating notes and known Linux operating system issues for Oracle Server X8-2.
Upgrade to the Latest UEK 5 Kernel With Systems That Have Oracle Storage 12 Gb/s SAS PCIe HBAs
Important Operating Note
After installing the Oracle Linux 7 operating system (OS) on a system that has internal and/or external Oracle Storage 12 Gb/s SAS PCIe HBAs, upgrade to the latest Unbreakable Enterprise Kernel (UEK) 5 before rebooting the system. Otherwise, a kernel panic failure might occur upon rebooting the system after OS installation. In the event that a kernel panic failure does occur, upgrading to the latest UEK 5 kernel addresses the failure.
For more information and instructions on updating the UEK for Oracle Linux, refer to the Unbreakable Enterprise Kernel web site at: https://docs.oracle.com/cd/E93554_01/ .
Parent topic: Linux Issues
Perform a Yum Update When Using Unbreakable Enterprise Kernel
Important Operating Note
When using the Unbreakable Enterprise Kernel (UEK) with supported versions of Oracle Linux, perform a yum update to obtain the latest UEK release updates.
For more information and instructions on updating the UEK for Oracle Linux, refer to the Unbreakable Enterprise Kernel web site at: https://docs.oracle.com/cd/E93554_01/ .
Parent topic: Linux Issues
Linux MMIO Kernel Configuration Can Affect Oracle Hardware Management Pack fwupdate Tool for Intel NIC/LOM Updates
Important Operating Note
On systems running Linux with Intel network interface cards or LAN-on-Motherboard (LOM) controllers, if MMIO memory access is set to strict access in the Linux kernel (iomem=strict or as part of the kernel build configuration) you will see the following message in syslog/dmeg when running the Oracle Hardware Management Pack fwupdate tool:
kernel: Program fwupdate tried to access /dev/mem between c4a00000->c4a01000. (Address may vary)
This message is expected and should not cause an issue with the operation of the
operating system. There will be one message each time fwupdate is run
and the kernel is in strict MMIO access mode.
However, when the kernel is running in this mode, fwupdate will not
be able to access Intel-based network controllers to either list information or update
firmware.
For more information on this issue including a workaround, see the "Linux MMIO Access
Settings Can Affect fwupdate Commands On Intel Network Controllers"
section in the Oracle Hardware Management Pack 2.4 Server CLI Tools User's
Guide at:
https://www.oracle.com/goto/ohmp/docs
.
Parent topic: Linux Issues