this post was submitted on 15 Mar 2024
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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This is the best summary I could come up with:
The FUSE passthrough mode that's been years in the making for better performance was merged upstream today for the in-development Linux 6.9 kernel!
Last month I wrote that FUSE passthrough might land for Linux 6.9 after noticing the patches finally appear in FUSE.git's "for-next" branch.
This feature was indeed sent in as part of the FUSE updates for Linux 6.9 and today Linus Torvalds merged it upstream.
The FUSE merge for Linux 6.9 sums up the feature as: Add passthrough mode for regular file I/O.
This allows performing read and write (also via memory maps) on a backing file without incurring the overhead of roundtrips to userspace.
For now this is only allowed to privileged servers, but this limitation will go away in the future FUSE for Linux 6.9 also fixes up an interaction issue in direct I/O mode with memory maps, exposes file-system tags through sysfs for VirtIOFS, and various other fixes.
The original article contains 248 words, the summary contains 153 words. Saved 38%. I'm a bot and I'm open source!