{"id":155127,"date":"2026-01-25T17:11:59","date_gmt":"2026-01-25T15:11:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predstavlena-fs-daxfs-pohozhaya-na-ramfs-i-tmpfs-no-rabotayushhaya-v-obhod-stranichnogo-kesha"},"modified":"2026-01-25T17:11:59","modified_gmt":"2026-01-25T15:11:59","slug":"predstavlena-fs-daxfs-pohozhaya-na-ramfs-i-tmpfs-no-rabotayushhaya-v-obhod-stranichnogo-kesha","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/predstavlena-fs-daxfs-pohozhaya-na-ramfs-i-tmpfs-no-rabotayushhaya-v-obhod-stranichnogo-kesha","title":{"rendered":"Bemutat\u00e1sra ker\u00fclt a DAXFS f\u00e1jlrendszer, amely a ramfs \u00e9s tmpfs f\u00e1jlrendszerekhez hasonl\u00f3an a lapoz\u00e1si gyors\u00edt\u00f3t\u00e1rat kiker\u00fclve m\u0171k\u00f6dik.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Cong Wang, a developer of the Traffic Control subsystem in the Linux kernel and the Multikernel project, has introduced a new file system called DAXFS in the list of Linux kernel developers. DAXFS uses RAM for data storage, operates in read-only mode, and resembles the functionality of the stripped-down file systems ramfs and tmpfs. The kernel module implementing DAXFS, as well as the mkdaxfs utility for creating the file system, are published under the GPLv2 license. The possibility of integrating DAXFS into the main kernel is under review after a review process. <\/p>\n
A key feature of the new file system is the use of the DAX (Direct Access) subsystem to bypass the page cache and access shared physical memory directly. In ramfs and tmpfs, the contents are stored in the page cache, which, when using the same file system in multiple containers or kernels launched with Multikernel technology, leads to several copies of data in physical memory. Furthermore, filling ramfs and tmpfs requires unnecessary copy operations without the possibility of mapping existing memory areas. <\/p>\n
Direct memory access in DAXFS eliminates unnecessary copy operations and organizes work around the traditional block device I\/O stack and buffering mechanisms, and also avoids memory allocation fragmentation when sharing the same file system across different containers and multikernel kernels. DAXFS operates in Zero-Copy mode and directly serves file contents from memory without unnecessary data duplication in the page cache, with the ability to map contiguous areas of physical memory into each container or kernel instance. Additionally, it supports the use of the dma-buf API for utilizing memory exported by GPU, FPGA\/SmartNIC, or CXL devices. <\/p>\n
The file system operates in read-only mode and is initialized by loading a pre-prepared file system image into memory, which simplifies implementation, eliminates memory allocation operations during runtime, and avoids complicated device management mechanisms. <\/p>\n
A DAXFS f\u0151 alkalmaz\u00e1si ter\u00fclet\u00e9nek sz\u00e1m\u00edt a Multikernel technol\u00f3gia alkalmaz\u00e1sa, amely lehet\u0151v\u00e9 teszi, hogy egy fizikai sz\u00e1m\u00edt\u00f3g\u00e9pen t\u00f6bb f\u00fcggetlen Linux kernel p\u00e9ld\u00e1ny fusson, amelyek k\u00f6zvetlen hozz\u00e1f\u00e9r\u00e9ssel rendelkeznek a hardveres er\u0151forr\u00e1sokhoz \u00e9s haszn\u00e1lhat\u00f3k t\u00f6bb elszigetelt rendszerk\u00f6rnyezet m\u0171k\u00f6dtet\u00e9s\u00e9re. <\/p>\n
A DAXFS-t \u00fagy is fel lehet haszn\u00e1lni, hogy t\u00f6bb kont\u00e9ner vagy kernel k\u00f6z\u00f6s hozz\u00e1f\u00e9r\u00e9st kapjon egy alap rendszerk\u00e9phez, amely megosztott mem\u00f3ri\u00e1ban tal\u00e1lhat\u00f3; cs\u00f6kkentse a hardveres gyors\u00edt\u00f3k mem\u00f3ri\u00e1hoz val\u00f3 hozz\u00e1f\u00e9r\u00e9s\u00e9nek r\u00e1ford\u00edt\u00e1sait; lehet\u0151v\u00e9 tegye a mem\u00f3ria el\u00e9r\u00e9s\u00e9t t\u00f6bb gazdag\u00e9pr\u0151l h\u00e1l\u00f3zati bemeneti-kimenet n\u00e9lk\u00fcl, vagy a CXL (Compute Express Link) busz alap\u00fa eszk\u00f6z\u00f6k haszn\u00e1lat\u00e1val az \u00e1lland\u00f3 mem\u00f3ri\u00e1hoz. \n Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"