![\"LINUX](\"https:\/\/www.newsbeep.com\/uk\/wp-content\/uploads\/2025\/09\/linuxstorage.webp.webp\")
\nThere’s yet another new Linux file-system on the block: DAXFS has been announced as a new read-only open-source file-system.<\/p>\n
\nThere’s yet another new Linux file-system on the block: DAXFS has been announced as a new read-only open-source file-system.<\/p>\n
DAXFS as implied by the name makes use of the Linux kernel’s direct access “DAX<\/a>” infrastructure. DAX is designed as a simple read-only file-system operating directly atop shared physical memory.
<\/p>\n DAXFS is designed to provide zero-copy reads from contiguous memory regions and bypasses the traditional block I\/O stack, buffer heads, and page cache entirely — a big difference compared to the likes of RAMFS or TMPFS.
<\/p>\n DAXFS is designed for zero-copy efficiency, true physical sharing, hardware integration with the likes of GPUs and CXL hardware, and simplicity:
<\/p>\n “Key Features
– Zero-Copy Efficiency: File reads resolve to direct memory loads, eliminating page cache duplication and CPU-driven copies.
– True Physical Sharing: By mapping a contiguous physical address or a dma-buf, multiple kernel instances or containers can share the same physical pages.
– Hardware Integration: Supports mounting memory exported by GPUs, FPGAs, or CXL devices via the dma-buf API.
– Simplicity: Uses a self-contained, read-only image format with no runtime allocation or complex device management.”
\n
DAXFS is being developed by Multikernel.io, the developers behind a proposed multi-kernel architecture for Linux<\/a>. As part of their DAXFS work they aim to enhance their multi-kernel efforts as well as enhancing CXL support and better accelerator data handling:
\n
“Primary Use Cases
– Multikernel Environments: Sharing a common Docker image across independent kernel instances via shared memory.
– CXL Memory Pooling: Accessing read-only data across multiple hosts without network I\/O.
– Container Rootfs Sharing: Using a single DAXFS base image for multiple containers (via OverlayFS) to save physical RAM.
– Accelerator Data: Zero-copy access to model weights or lookup tables stored in device memory.”
\n
DAXFS was announced<\/a> today on the Linux Kernel Mailing List. The current DAXFS kernel module and user-space tool for it can currently be found on GitHub<\/a> while awaiting to see the level of upstream interest in potentially working toward upstreaming it into the mainline Linux kernel.<\/p>\n","protected":false},"excerpt":{"rendered":"There’s yet another new Linux file-system on the block: DAXFS has been announced as a new read-only open-source…\n","protected":false},"author":2,"featured_media":389415,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[5870,59,5869,5867,5866,5873,5871,5868,5872,5865,5876,86,5874,5875,56,54,55],"class_list":{"0":"post-389414","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technology","8":"tag-desktop-linux","9":"tag-gb","10":"tag-linux-benchmarking","11":"tag-linux-hardware-benchmarks","12":"tag-linux-hardware-reviews","13":"tag-linux-how-to","14":"tag-linux-performance","15":"tag-linux-server-benchmarks","16":"tag-open-source-graphics","17":"tag-phoronix","18":"tag-phoronix-test-suite","19":"tag-technology","20":"tag-ubuntu-benchmarks","21":"tag-ubuntu-hardware","22":"tag-uk","23":"tag-united-kingdom","24":"tag-unitedkingdom"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/389414","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/comments?post=389414"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/posts\/389414\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media\/389415"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/media?parent=389414"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/categories?post=389414"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/uk\/wp-json\/wp\/v2\/tags?post=389414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}