Folio Improvements For Linux 5.17, Large Folio Patches Posted
Written by Michael Larabel in Linux Kernel on 18 January 2022 at 04:58 AM EST. 1 Comment
LINUX KERNEL --
Back in November memory folios were merged into Linux 5.16 as a fundamental change to the memory management code. Now for Linux 5.17 there are improvements for folios merged and then out likely for Linux 5.18 is introducing the notion of large folios.

Linux's memory folios is designed to let file-systems and the page cache manage memory in chunks larger than the default page size. With Linux 5.16 the core memory management and page cache changes landed for supporting folios. Most benchmarks of folios put the performance benefit in the 0~10% region.

Merged for Linux 5.17 is the folios update that includes converting much of the page cache code to using folios.

Meanwhile Matthew Wilcox of Oracle posted the set of patches on Sunday for enabling large folios. Those patches allow creating large folios in the readahead and fault paths and works with the XFS file-system for now. However, this large folios work isn't intended for Linux 5.17 and will likely be deemed ready for mainline inclusion with the v5.18 cycle in the spring.
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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 or contacted via MichaelLarabel.com.

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