Linux 7.1 is here to end the Intel 486 CPU era - and do some serious legacy clean up

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ZDNET's cardinal takeaways

• It's the extremity of the roadworthy for the 486 processor.
• NTFS is yet a first-class record strategy connected Linux.
• The latest kernel boasts different improvements.

On his mode to Mumbai for the Open Source Summit India, Linus Torvalds announced the latest Linux kernel: 7.1. This caller mentation comes with a brand‑new in‑kernel, Microsoft's New Technology File System (NTFS) implementation, Intel's Flexible Return and Event Delivery (FRED) enabled by default, and a purge of aging codification and hardware support, including the extremity of the roadworthy for 486 support. 

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The caller kernel arrives conscionable months aft Linux 7.0 debuted with large networking and filesystem changes. Version 7.1 continues the inclination of tightening Linux's hardware absorption portion improving show and security.

New NTFS driver

The header alteration for astir radical successful Linux 7.1 is its caller autochthonal NTFS driver. Many Linux users, whether they similar it oregon not, indispensable woody with Microsoft record systems, and that's wherever this operator comes in. It replaces some the old, dusty NTFS‑3G FUSE operator successful galore setups and the Paragon‑contributed NTFS3 kernel driver that has had a bumpy past with data‑corruption reports. Indeed, Torvalds himself calls this caller operator an "NTFS resurrection."

The caller codification is built connected Linux's modern filesystem infrastructure, utilizing iomap and folios alternatively of older buffer_head‑centric paths. The caller and improved NTFS enactment was designed from the outset for robust read‑write support, amended mistake handling, and much predictable behaviour nether dense parallel I/O.

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According to the caller NTFS developer, Namjae Jeon, portion the caller NTFS operator shows lone humble single‑threaded constitute gains, its improvements are acold much awesome erstwhile aggregate threads lb connected the aforesaid NTFS volume. There, multi‑threaded writes tin beryllium 35–110% faster than earlier drivers, portion mounting a 4TB NTFS measurement is reported to beryllium astir 4 times faster. 

For users who regularly shuttle information betwixt Windows and Linux via outer drives oregon dual‑boot setups, this alteration should marque NTFS consciousness overmuch much similar a first‑class national connected Linux desktops and laptops.

Intel FRED arsenic the default

On the CPU side, Linux 7.1 flips the power connected Intel's FRED, enabling it by default connected supported Intel platforms. FRED is simply a caller hardware mechanics for handling entries and exits successful privileged modes, specified arsenic interrupts, exceptions, and strategy calls. FRED's extremity is to simplify control‑flow transitions and trim the reliance connected bequest introduction stacks that person grown progressively analyzable and insecure implicit the years.

By moving to FRED, the kernel gets a cleaner separation betwixt idiosyncratic and kernel power flows. This attack not lone shrinks immoderate overhead successful high‑frequency lawsuit handling but besides promises a tighter information communicative astir those transitions. 

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For now, the benefits volition mostly beryllium felt connected caller Intel lawsuit and server hardware. However, arsenic much vendors prime akin mechanisms, 7.1's enactment positions Linux to instrumentality vantage of aboriginal architectural features successful the space.

Fresh information features

Linux 7.1 besides brings a bid of information improvements. This enactment starts with enactment for Intel's Linear Address Space Separation (LASS). LASS constrains however codification tin entree antithetic regions of the linear code space, making definite classes of memory‑corruption and control‑flow attacks harder to exploit by enforcing stronger separation betwixt codification and information regions. In tandem with FRED, LASS underlines an architectural displacement toward hardening the bound betwixt userland and kernel, arsenic good arsenic betwixt antithetic types of in‑kernel objects.

Under the hood, the crypto subsystem gets a rework that enables much optimizations by default, which should wage disconnected everyplace encryption and hashing are blistery paths: TLS stacks, VPNs, encrypted filesystems, and distributed storage.

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On the CPU front, determination is further enablement for AMD's upcoming Zen 6 processors, with caller IDs, errata workarounds, and tuning hooks landing successful 7.1, ensuring the kernel is acceptable for the adjacent procreation of EPYC and Ryzen parts erstwhile they deed the market.

Aggressive bequest cleanup

While 7.1 delivers wide wins for modern systems, it is besides unambiguous astir wherever Linux is nary longer consenting to go. This merchandise continues the process of ripping retired enactment for Intel's 486‑class processors and different aboriginal x86 variants. Kernel maintainers person been telegraphing for immoderate time. Mainstream distributions had agelong since moved their baselines to astatine slightest i586 oregon x86‑64. To my knowledge, nary large Linux distro presently supports 486 processors. 

Beyond CPUs, the codebase sheds implicit 140,000 lines of bequest code. This includes a drawback container of obsolete web and PCMCIA drivers, arsenic good arsenic the removal of Baikal CPU support. The rationale is two‑fold: Reduce the onslaught aboveground exposed by ancient, hardly tested codification paths, and easiness long‑term attraction by freeing developers from the request to sphere behaviors for hardware that has vanished from production. Retro‑computing enthusiasts volition inactive beryllium capable to tally older kernels, but the enactment betwixt "supported" and "museum piece" is getting sharper.

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At archetypal glance, Linux 7.1 is conscionable a constituent release, but its premix of a caller NTFS driver, FRED and LASS enablement, assertive bequest cleanup, and continued hardware enactment volition beryllium important for some desktops and information centers. 

For mundane users, the astir evident interaction volition apt beryllium smoother, safer enactment with NTFS‑formatted drives. For operators and OEMs, the communicative is much astir information posture, level support, and getting acceptable for the adjacent question of Intel and AMD silicon.