Chapter 8. Kernel

KVM Hypervisor supports 240 vCPUs per virtual machine

The KVM hypervisor has been improved to support 240 virtual CPUs (vCPUs) per KVM guest virtual machine.

iwlwifi supports Intel® Wireless 7265/3165 (Stone Peak) wireless adapter

The iwlwifi device driver now supports the Intel® Wireless 7265/3165 (Stone Peak) wireless adapter.

Support for Wacom 22HD Touch tablets

This update adds support for Wacom 22HD Touch tablets, which are now correctly recognized in Red Hat Enterprise Linux and thus functional.

Improved page fault scalability for HugeTLB

The updated Linux kernel has improved page fault scalability for HugeTLB. Previously only one HugeTLB page fault could be processed at a time because a single mutex was used. The improved method uses a table of mutexes, allowing for page faults to be processed in parallel. Calculation of the mutex table includes the number of page faults occurring and memory in use.

kdump supports hugepage filtering

To reduce both vmcore size and capture run time, kdump now treats hugepages as userpages and can filter them out. As hugepages are primarily used for application data, they are unlikely to be relevant in the event a vmcore analysis is required.

Support for 802.1X EAP packet forwarding on bridges

Bridge forwarding of 802.1x EAP packets is now supported, allowing for selective forwarding of some non-control link-local packets. This change also enables the use of 802.1X to authenticate a guest on a RHEL6 hypervisor using Linux bridge on a switch port.

Rebase of the mtip32xx driver

The Red Hat Enterprise Linux 6.7 kernel includes the most recent upstream version of the mtip32xx device driver. This version adds support for Micron SSD devices.

turbostat supports 6th Generation Intel Core Processors

The turbostat application now supports Intel's 6th Generation Intel Core Processors.