--- title: "Linux 7.3 To Overcome \"Significant Bottleneck\" For Small I/O With PCIe Gen5 NVMe SSDs" url: https://daily.dev/posts/linux-7-3-to-overcome-significant-bottleneck-for-small-i-o-with-pcie-gen5-nvme-ssds-sazbtubwn source_url: https://www.phoronix.com/news/Linux-7.3-Faster-Small-Direct type: article source: "Phoronix" published: 2026-07-01T16:12:07.897Z updated: 2026-07-01T16:12:47.796Z tags: ["linux"] reading_time: 2 upvotes: 2 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. # Linux 7.3 To Overcome "Significant Bottleneck" For Small I/O With PCIe Gen5 NVMe SSDs **[Phoronix](https://daily.dev/sources/phoronix)** · 2 min read · 2 upvotes · 0 comments ## Summary A Bytedance engineer identified a significant bottleneck in the Linux kernel's IOmap framework affecting small direct I/O performance on PCIe Gen5 NVMe SSDs. The fix introduces a simplified direct I/O path for small I/O requests (size <= inode blocksize) on EXT4 and XFS, bypassing heavy IOmap overhead. Benchmarks show an improvement from 1.92M to 2.19M IOPS for 4K random reads, with up to 10% gains when using io_uring with high queue depths. The patch has been merged into the VFS subsystem's vfs-7.3.iomap branch and is expected to land in Linux 7.3. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [IOmap Improvement For Linux 7.3 Takes EXT4 & XFS Performance Further](https://daily.dev/posts/iomap-improvement-for-linux-7-3-takes-ext4-xfs-performance-further-ayzsohqii) · Phoronix · 0 upvotes · 0 comments - [Linux 7.2 Optimization Shows \+5% IOPS For EXT4 & XFS After Moving Around Two Lines Of Code](https://daily.dev/posts/linux-7-2-optimization-shows-5-iops-for-ext4-xfs-after-moving-around-two-lines-of-code-nx631vsmn) · Phoronix · 1 upvotes · 0 comments - [Someone moved three lines of code in Linux 7.2 and got a 5% storage speed boost](https://daily.dev/posts/someone-moved-three-lines-of-code-in-linux-7-2-and-got-a-5-storage-speed-boost-4juxmldkx) · XDA Developers · 0 upvotes · 0 comments - [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 --- Tags: [#linux](https://daily.dev/tags/linux) [View this post on daily.dev](https://daily.dev/posts/linux-7-3-to-overcome-significant-bottleneck-for-small-i-o-with-pcie-gen5-nvme-ssds-sazbtubwn)