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Linux 5.9 Set To Bring ARMv8 TTL Support

Written by Michael Larabel in Arm on 14 July 2020 at 06:45 AM EDT. Add A Comment

In addition to Linux 5.9 poised to bring ARMv8 Memory Tagging Extension support (MTE), another ARM architectural feature now queued up for introduction in this next kernel cycle is Translation Table Level support.

Translation Table Level, or TTL, is a feature supported in ARMv8.4+ for reducing the cost/overhead of TLB invalidation. TTL can speed up the translation lookaside buffer invalidation process as it contains a level hint of the page table walk holding the leaf entry for the address being invalidated.

As of this week the ARM TTL support is queued as part of the ARM64 changes slated to go into Linux 5.9 when the merge window opens next month.

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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 20,000 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, LinkedIn, or contacted via MichaelLarabel.com.