Latest Linux and open source news from around the web

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Phoronix

Linux 7.1 Lands High Resolution Timer "HRTIMER" Overhaul

Merged this week for Linux 7.1 was a rework of the high resolution timer "HRTIMER" subsystem for reducing the overhead of frequently-armed timers, such as the HRTICK scheduler timer. The HRTICK scheduler timer is useful for enhancing system responsiveness and fairness...

Phoronix

The "NTFS Resurrection" Has Occurred For Linux 7.1

As a very exciting follow-up to the recent article around the new NTFS driver being submitted for Linux 7.1 to address the shortcomings of the current Paragon NTFS3 driver and the prior read-only NTFS kernel driver, that work has been merged!..

Foss Force

AI Pushes Cal.com to Shutter Open and Go Nonfree

Cal.com blames AI-powered vulnerability hunting for its move from open source to locked-down code β€” and tosses a crippled β€˜community’ edition to keep its cred. The post AI Pushes Cal.com to Shutter Open and Go Nonfree appeared first on FOSS Force.

LWN.net

[$] A more efficient implementation of Shor's algorithm

Shor's algorithm is the main practical example of an algorithm that runs more quickly on a quantum computer than a classical computer β€” at least in theory. Shor's algorithm allows large numbers to be factored into their component prime factors quickly. In reality, existing quantum computers do not have nearly enough memory to factor interesting numbers using Shor's algorithm, despite decades of research. A new paper provides a major step in that direction, however. While still impractical on today's quantum computers, the recent discovery cuts the amount of memory needed to attack 256-bit elliptic-curve cryptography by a factor of 20. More interesting, however, is that the researchers chose to publish a zero-knowledge proof demonstrating that they know a quantum circuit that shows these improvements, rather than publishing the actual knowledge of how to do it.

LWN.net

[$] The 7.0 scheduler regression that wasn't

One of the more significant changes in the 7.0 kernel release is to use the lazy-preemption mode by default in the CPU scheduler. The scheduler developers have wanted to reduce the number of preemption modes for years, and lazy preemption looks like a step toward that goal. But then there came this report from Salvatore Dipietro that lazy preemption caused a 50% performance regression on a PostgreSQL benchmark. Investigation showed that the situation is not actually so grave, but the episode highlights just how sensitive some workloads can be to configuration changes; there may be surprises in store for other users as well.

LWN.net

Security updates for Friday

Security updates have been issued by AlmaLinux (.NET 8.0, .NET 9.0, freerdp, libarchive, and thunderbird), Debian (chromium, openssh, and thunderbird), Fedora (aurorae, bluedevil, breeze-gtk, buildah, cockpit, extra-cmake-modules, flatpak-kcm, grub2-breeze-theme, kactivitymanagerd, kcm_wacomtablet, kde-cli-tools, kde-gtk-config, kdecoration, kdeplasma-addons, kf6, kf6-attica, kf6-baloo, kf6-bluez-qt, kf6-breeze-icons, kf6-frameworkintegration, kf6-kapidox, kf6-karchive, kf6-kauth, kf6-kbookmarks, kf6-kcalendarcore, kf6-kcmutils, kf6-kcodecs, kf6-kcolorscheme, kf6-kcompletion, kf6-kconfig, kf6-kconfigwidgets, kf6-kcontacts, kf6-kcoreaddons, kf6-kcrash, kf6-kdav, kf6-kdbusaddons, kf6-kdeclarative, kf6-kded, kf6-kdesu, kf6-kdnssd, kf6-kdoctools, kf6-kfilemetadata, kf6-kglobalaccel, kf6-kguiaddons, kf6-kholidays, kf6-ki18n, kf6-kiconthemes, kf6-kidletime, kf6-kimageformats, kf6-kio, kf6-kirigami, kf6-kitemmodels, kf6-kitemviews, kf6-kjobwidgets, kf6-knewstuff, kf6-knotifications, kf6-knoti