--- title: "Btrfs Change Coming For Linux 7.2 Yields Very Healthy Performance Gain" url: https://daily.dev/posts/btrfs-change-coming-for-linux-7-2-yields-very-healthy-performance-gain-qsfimmuky source_url: https://www.phoronix.com/news/Btrfs-No-Serialize-Direct-IO type: article source: "Phoronix" published: 2026-05-29T11:28:38.884Z updated: 2026-05-29T11:29:04.448Z tags: ["performance", "linux", "file-systems"] reading_time: 2 upvotes: 10 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Btrfs Change Coming For Linux 7.2 Yields Very Healthy Performance Gain **[Phoronix](https://daily.dev/sources/phoronix)** · 2 min read · 10 upvotes · 0 comments ## Summary A one-line fix coming in Linux 7.2 restores Btrfs Direct I/O (DIO) write parallelism that was accidentally broken in 2023 during the migration to the new kernel mount API. The bug caused DIO writes to the same file to be serialized by always acquiring an exclusive inode lock, due to the SB_NOSEC flag not being set. Meta engineer Mark Harmstone identified the regression, and the fix yields roughly 59% throughput improvement (826 MB/s to ~1311 MB/s) on his hardware, with Intel's Kernel Test Robot also confirming ~12% gains. The patch is in the '-next' tree and expected to land in the Linux 7.2 merge window in June. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Btrfs Ready With More Performance Improvements For Linux 7.3: Some ~3x To ~5x Wins](https://daily.dev/posts/btrfs-ready-with-more-performance-improvements-for-linux-7-3-some-3x-to-5x-wins-b4x0ludw1) · Phoronix · 1 upvotes · 0 comments - [Btrfs Brings Performance Improvements, Shutdown ioctl Stable With Linux 7.1](https://daily.dev/posts/btrfs-brings-performance-improvements-shutdown-ioctl-stable-with-linux-7-1-wjasfn6w6) · Phoronix · 0 upvotes · 0 comments - [Btrfs Brings BS Greater Than PS For Linux 6.18, Better Parallelism For Read-Heavy Workloads](https://daily.dev/posts/btrfs-brings-bs-greater-than-ps-for-linux-6-18-better-parallelism-for-read-heavy-workloads-bhkrjekah) · Phoronix · 1 upvotes · 0 comments --- Tags: [#performance](https://daily.dev/tags/performance), [#linux](https://daily.dev/tags/linux), [#file-systems](https://daily.dev/tags/file-systems) [View this post on daily.dev](https://daily.dev/posts/btrfs-change-coming-for-linux-7-2-yields-very-healthy-performance-gain-qsfimmuky)