Several ARM64 Changes Queued For Linux 4.14, VMAP_STACK Support
Written by Michael Larabel in Hardware on 5 September 2017 at 01:07 PM EDT. 7 Comments
HARDWARE --
There are a few noteworthy ARM64 (64-bit ARM) architecture updates worth noting for the ongoing Linux 4.14 merge window.

First up, ARM64 (AArch64) now supports VMAP_STACK to let kernel stacks be allocated in vmalloc space with a guard page for trapping possible stack overflows. It was back during Linux 4.9 that x86_64 picked up the vmap'ed stack support.

There is also support for contiguous PTE hugetlb support has been re-enabled, initial support for persistent memory on ARM, RAID6 improvements for ARM64 via algorithm optimizations and recovery routines using NEON, FP/SIMD code refactoring, and perf subsystem support for Cortex A35 and A73 processors.

There is also a number of lower-level code improvements and bug fixes via this ARM64 update.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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