Btrfs Brings Some Great Performance Improvements With Linux 6.1

Written by Michael Larabel in Linux Kernel on 4 October 2022 at 07:30 AM EDT. 45 Comments
I always love pull requests that start off with "there's a bunch of performance improvements..." as is the case with the new Btrfs feature pull for Linux 6.1.

Btrfs with Linux 6.1 brings async buffered writes for a possible ~2x or more throughput improvement.

The Btrfs async buffered writes and with IO_uring is quite promising.

There is also a significant FIEMAP speed improvement. There is a change to the algorithm for how extents are enumerated and "leads to orders of magnitude speed boost".

There is also improved inode logging that can lead to around a 25% throughput improvement and with a maximum latency lower by about 21% with Dbench, improved buffer I/O, and a variety of other smaller performance improvements.

Plus there is initial fs-verity support in the Btrfs send code, more effective memory use in the Btrfs scrub code, various fixes, and other improvements.

Basically, lots of great improvements for Btrfs with Linux 6.1, especially in the performance department. See the complete list of Btrfs patches for Linux 6.1 via this pull request.
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Michael Larabel is the principal author of 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 automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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