EXT4 Rolls Up Some Fixes & Performance Optimizations For Linux 6.1

Written by Michael Larabel in Linux Storage on 5 October 2022 at 04:43 AM EDT. 1 Comment
LINUX STORAGE --
Ted Ts'o has submitted the EXT4 file-system updates for the Linux 6.1 kernel.

While there is a lot of Btrfs performance work for Linux 6.1, over on the EXT4 side it's a relatively quiet cycle. There are some bug fixes as well as some performance optimization tuning but overall nothing dramatic with EXT4 continuing to prove itself as a reliable and robust Linux file-system.

Some of the EXT4 highlights for Linux 6.1 include:
Performance:

- Always enable i_version counter (as btrfs and xfs already do). Remove some uneeded i_version bumps to avoid unnecessary nfs cache invalidations.

- Wake up journal waters in FIFO order, to avoid some journal users from not getting a journal handle for an unfairly long time.

- In ext4_write_begin() allocate any necessary buffer heads before starting the journal handle.

- Don't try to prefetch the block allocation bitmaps for a read-only file system.

Bug Fixes:

- Fix a number of fast commit bugs, including resources leaks and out of bound references in various error handling paths and/or if the fast commit log is corrupted.

- Avoid stopping the online resize early when expanding a file system which is less than 16TiB to a size greater than 16TiB.

- Fix apparent metadata corruption caused by a race with a metadata buffer head getting migrated while it was trying to be read.

- Mark the lazy initialization thread freezable to prevent suspend failures.

More details on the EXT4 changes for Linux 6.1 via this pull request.
Related News
About The Author
Author picture

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.

Popular News This Week