An anonymous reader quotes a report from ZDNet, written by Steven Vaughan-Nichols: Mainframes and AI? Isn't that something like a Model-T Ford with a Tesla motor? Actually, no. Mainframes are as relevant in 2022 as they were in the 1960s. IBM's new IBM z16, with its integrated on-chip Telum AI accelerator, is ready to analyze real-time transactions, at scale. This makes it perfect for mainframe mission-critical workloads such as healthcare and financial transactions. This 21st century Big Iron AI accelerator is built onto its core Telum processor. With this new dual-processor 5.2 GHz chip and its 16 cores, it can perform 300 billion deep-learning inferences per day with one-millisecond latency. Can you say fast? IBM can.

Anthony Saporito, a senior technical staff member for IBM Z hardware development, said "One of the Telum design's key innovations is we built an AI accelerator right onto the silicon of the chip and we directly connected all of the cores and built an ecosystem up the stack. Through the hardware design, firmware, the operating systems, and the software, deep learning is built into all of the transactions." According to Patrick Moorhead, Moor Insights & Strategy's chief analyst, "The AI accelerator is a game-changer. The z16 with z/OS has a 20x response time with 19x higher throughput when inferencing compared to a comparable x86 cloud server with 60ms average network latency."

The new model z16 also includes a so-called quantum-safe system to protect organizations from near-future threats that might crack today's encrypted files. This is done with the z16's support of the Crypto Express8S adapter. Built around a CCA cryptographic coprocessor and a PKCS #11 cryptographic coprocessor, it enables users to develop quantum-safe cryptography. It also works with classical cryptography. If you want your data and transactions to be safe both today and tomorrow, this deserves your attention.

It's been a long road, but Microsoft announced on April 4 a preview of Arm support on Azure virtual machines via its work with Ampere Computing. ZDNet reports: Ampere is a startup that makes server chips. Ampere announced last year it had signed up Microsoft and Tencent Holdings as major customers. "We are now supporting Arm on Azure as well. This has been a long journey to bring up Ampere on Azure with Windows as the Root Host OS! we are also supporting Windows 11 Arm VMs in preview for developers!" tweeted Hari Pulapaka, the director of PM for Azure Host OS and the Windows OS platform. "FYI all Windows developers who have been asking for VM support in Azure, it's here now."

Azure VMs with Ampere Altra Arm-based processors will offer up to 50 percent better price-performance than comparable x86-based VMs for scale-out workloads, Microsoft officials said. These new VMs are also for Web servers, application servers, open-source databases, gaming servers, media servers, and more, they added. The preview is initially available in the West US 2, West Central US, and West Europe Azure regions. Ampere's announcement of the Azure VM preview is here.

"Asahi Linux aims to bring you a polished Linux experience on Apple Silicon Macs," explains the project's web site.

And now that first Asahi Linux alpha release is out — ready for testing on M1, M1 Pro, and M1 Max machines (except Mac Studio): We're really excited to finally take this step and start bringing Linux on Apple Silicon to everyone. This is only the beginning, and things will move even more quickly going forward!

Keep in mind that this is still a very early, alpha release. It is intended for developers and power users; if you decide to install it, we hope you will be able to help us out by filing detailed bug reports and helping debug issues. That said, we welcome everyone to give it a try — just expect things to be a bit rough.... Asahi Linux is developed by a group of volunteers, and led by marcan as his primary job. You can support him directly via Patreon and GitHub Sponsors....

Can I dual-boot macOS and Linux?

Yes! In fact, we expect you to do that, and the installer doesn't support replacing macOS at this point. This is because we have no mechanism for updating system firmware from Linux yet, and until we do it makes sense to keep a macOS install lying around for that. You can have as many macOS and Linux installs as you want, and they will all play nicely and show up in Apple's boot picker. Each Linux install acts as a self-contained OS and should not interfere with the others.

Note that keeping a macOS install around does mean you lose ~70GB of disk space (in order to allow for updates, since the macOS updater is quite inefficient). In the future we expect to have a mechanism for firmware updates from Linux and better integration, at which point we'll be comfortable recommending Linux-only setups....

Is this just Arch Linux ARM?

Pretty much! Most of our work is in the kernel and a few core support packages, and we rely on Linux's excellent existing ARM64 support. The Asahi Linux reference distro images are based off of Arch Linux ARM and simply add our own package repository, which only adds a few packages. You can freely convert between Arch Linux ARM and Asahi Linux by adding or removing this repository and the relevant packages, although vanilla Arch Linux ARM kernels will not boot on these machines at this time.
The project's home page adds that "All contributors are welcome, of any skill level!"

"Doing this requires a tremendous amount of work, as Apple Silicon is an entirely undocumented platform," the team explains. "In particular, we will be reverse engineering the Apple GPU architecture and developing an open-source driver for it." But they're already documenting the Apple Silicon platform on their GitHub wiki. We will eventually release a remix of Arch Linux ARM, packaged for installation by end-users, as a distribution of the same name. The majority of the work resides in hardware support, drivers, and tools, and it will be upstreamed to the relevant projects....

Apple allows booting unsigned/custom kernels on Apple Silicon Macs without a jailbreak! This isn't a hack or an omission, but an actual feature that Apple built into these devices. That means that, unlike iOS devices, Apple does not intend to lock down what OS you can use on Macs (though they probably won't help with the development). As long as no code is taken from macOS to build the Linux support, the result is completely legal to distribute and for end-users to use, as it would not be a derivative work of macOS.
An interesting observataion from Slashdot reader mrwireless: It once again seems Apple is informally supportive of these efforts, as the recent release of OS Monterey 12.3 makes the process even simpler. As Twitter user Matthew Garrett writes:

"People who hate UEFI should read https://github.com/AsahiLinux/... — Apple made deliberate design choices that allow third party OSes to run on M1 hardware without compromising security, and with much less closed code than on basically any modern x86."

An anonymous reader shares a report: Lenovo has dumped a whole bunch of new ThinkPads into the world, and there's some exciting stuff in there. We're getting a brand-new ThinkPad X13s powered by Snapdragon chips, a fifth-generation ThinkPad X1 Extreme with a WQXGA 165Hz screen option, and new additions to the P-series and T-series as well. The news I'm personally most excited about is the screen shape. A few months ago, Lenovo told me that much of its portfolio would be moving to the 16:10 aspect ratio this year. They appear to be keeping their word. Across the board, the new models are 16:10 -- taller and roomier than they were in their 16:9 eras. Some news that's a bit more... intriguing is the all-new ThinkPad X13s, which is the first laptop to feature the Snapdragon 8cx Gen 3 compute platform. Qualcomm made some lofty claims about this platform upon its release, including "60 percent greater performance per watt" over competing x86 platforms and "multi-day battery life." The ThinkPad X13s will run an Arm version of Windows 11, with its x64 app emulation support. The P-series models and Intel T-series models will all be here in April, with prices ranging from $1,399 to $1,419.

Intel has acquired Linutronix, the German-based Linux consulting firm that is focused on embedded Linux and real-time computing. From a report: Intel's acquisition of Linutronix appears to be primarily focused as an acqui-hire with getting Linutronix's very talented staff at Intel. Among the prominent Linutronix engineers is their CTO Thomas Gleixner as a longtime kernel maintainer and important contributor on the x86 side, including with Linux's CPU security mitigations and perhaps most notably for the real-time (PREEMPT_RT) work.

AMD on Monday completed the acquisition of Xilinx, creating a company that can offer various types of compute devices, including CPUs, GPUs, and FPGAs. Tom's Hardware reports: AMD CEO Dr. Lisa Su told analyst Patrick Moorhead that the first processor combining Xilinx technologies will arrive in 2023, which is in contrast to the company's previous integration efforts. After AMD bought ATI Technologies in 2006, it took the company five years to build its first accelerated processing units (which included AMD's x86 cores and ATI's GPU). This time AMD inked a long-term development pact with Xilinx and was able to work collaboratively even before the regulators approved the transaction. It remains to be seen what exactly AMD plans to offer, but it is reasonable to expect the new processor to feature AMD's x86 cores and Xilinx's programmable engines.

The move will help AMD to continue expanding its presence in the datacenter sector and offer unique solutions that will combine IP ingredients designed by the two companies. Interestingly, the first fruits of the deal are expected to materialize next year. [...] The Xilinx business will become AMD's Adaptive and Embedded Computing Group (AECG), led by former Xilinx CEO Victor Peng. As a result, Xilinx will maintain its leadership for at least a while. Furthermore, AMD's embedded business will cease to be a part of the company's enterprise and semi-custom unit and will merge into AECG, which might be good news as executives from the enterprise division will now spend more time on EPYC CPUs. "The acquisition of Xilinx brings together a highly complementary set of products, customers and markets combined with differentiated IP and world-class talent to create the industry's high-performance and adaptive computing leader," said Lisa Su, chief executive of AMD. "Xilinx offers industry-leading FPGAs, adaptive SoCs, AI inference engines and software expertise that enable AMD to offer the strongest portfolio of high-performance and adaptive computing solutions in the industry and capture a larger share of the approximately $135 billion market opportunity we see across cloud, edge, and intelligent devices."

The Linux 5.18 kernel is adding support this spring for the Intel Hardware Feedback Interface to make better decisions about where to place given work among available CPU cores/threads, reports Phoronix.

This is significant because Intel's Alder Lake CPUs "are the first x86-64 processors to embrace a hybrid paradigm with two separate CPU architectures on the same die," explains Hot Hardware: These two separate CPU architectures have different strengths and capabilities. The Golden Cove "performance cores" (or P-cores) feature Intel's latest high-performance desktop CPU architecture, and they are blisteringly fast. Meanwhile, the Gracemont "efficiency cores" (or E-cores) are so small that four of them, along with 2MB of shared L2 cache, can nearly fit in the same space as a single Golden Cove core. They're slower than the Golden Cove cores, but also much more efficient, at least in theory.

The idea is that background tasks and light workloads can be run on the E-cores, saving power, while latency-sensitive and compute-intensive tasks can be run on the faster P-cores. The benefits of this may not have been exactly as clear as Intel would have liked on Windows, but they were even less visible on Linux. That's because Linux isn't aware of the unusual configuration of Alder Lake CPUs.

Well, that's changing in Linux 5.18, slated for release this spring. Linux 5.18 is bringing support for the Intel Enhanced Hardware Feedback Interface, or EHFI...

This is essentially the crux of Intel's "Thread Director," which is an intelligent, low-latency hardware-assisted scheduler.

An anonymous reader quotes a report from ZDNet: RISC-V International, the global open hardware standards organization has announced that Intel has joined RISC-V at the Premier membership level. Let that sink in for a minute. Intel, which has made billions from its closed-source, complex instruction set computer (CISC) x86 processors, is joining forces with RISC-V, the open-source reduced instruction set computer (RISC) CPU group. What next? Dogs and cats living together!? Dr. David Patterson, co-creator of RISC-V helped create it to be an open lingua franca for computer chips, a set of instructions that would be used by all chipmakers and owned by none. Today, Patterson said, "I'm delighted that Intel, the company that pioneered the microprocessor 50 years ago, is now a member of RISC-V International."

Why? Because Intel sees a future in which ARM, x86, and RISC-V all play major roles. In particular, Intel has already seen strong demand for more RISC-V intellectual property (IP) and chip offerings. Intel's not just giving this idea lip service. Intel also announced a new $1 billion fund to support early-stage foundry startups. Together Intel Capital and Intel Foundry Services (IFS) will prioritize investments in chip IP, software tools, innovative chip architectures, and advanced packaging technologies. Randhir Thakur, IFS President, said this new program will focus on two key strategic industry points: Enabling modular products with an open chiplet platform and supporting design approaches that leverage multiple instruction set architectures including and spanning x86, Arm, and RISC-V.

As part of these initiatives, IFS will sponsor an open-source software development platform. This will provide IP for all three of the leading ISAs chip architectures. RISC-V has always been about providing open modular building blocks. Together Intel and RISC-V will expand the RISC-V ecosystem and help drive its commercialization. [...] Intel is already offering RISC-V chips: It's Nios V processors based on RISC-V. Moving ahead Intel hopes its new RISC-V investment will speed up RISC-V's development. Calista Redmond, RISC-V International's CEO, sees these moves as recognizing that "massive investment in open source has the power to change the course of history." Redmond went on to say that open collaboration with RISC-V has "ignited a profound shift in the semiconductor industry, and this partnership will accelerate innovation in open computing. RISC-V welcomes Intel and looks forward to our collective expansion and the commercial adoption of RISC-V across compute workloads and industries, growing RISC-V everywhere."

Phoronix reports: The Linux 5.17 kernel when it kicks off next month is slated to introduce a new driver "x86-android-tablets" just for dealing with all the quirky/buggy x86 tablets out there.

Longtime Linux developer Hans de Goede of Red Hat has been responsible for numerous x86 laptop/tablet improvements in recent years along with other desktop-related improvements at Red Hat. He has now queued up into the x86 platform drivers tree the x86-android-tablets driver he wrote for dealing with the mess of x86 (mostly Android) tablets that don't behave properly out-of-the-box with Linux.

As part of the ACPI DSDT (Differentiated System Description Table), many x86 tablets have simply invalid entries and other problems that cause issue when trying to run mainline Linux on said hardware. Hans explains as part of the commit currently in the platform-drivers-x86 "for-next" branch....

"This driver, which loads only on affected models based on DMI matching, adds DMI based instantiating of kernel devices for devices which are missing from the DSDT, fixing e.g. battery monitoring, touchpads and/or accelerometers not working."

This new x86-android-tablets driver will basically be a catch-all solution for overrides based on device matching. Hans ended the patch message with, "This is the least ugly option to get these devices to fully work and to do so without adding any extra code to the main kernel image (vmlinuz) when built as a module."

At today's AWS re:Invent keynote, Amazon CTO Werner Vogels announced that AWS will now offer M1 Mac minis as part of its EC2 compute service. From a report: It was only last year, that AWS first brought Mac minis to its cloud. Using the Thunderbolt port, these minis connect to the AWS Nitro System, which helps make them available in the EC2 cloud, just like any other instance. The minis used here are the standard M1 8 core machines with 16 GiB of memory. The new instances will be available in two regions (US West - Oregon and US East - North Virginia) for $0.6498 per hour, with support for discounts through AWS' Savings Plans, too. AWS promises that these new machines offer a "60% better price performance over the x86-based EC2 Mac instances for iPhone and Mac app build workloads."

The Performance P650 won't beat a top-end Arm chip in a Samsung or Apple smartphone, but the startup believes its designs eventually could. From a report: It's really hard to get a new chip family to catch on when companies like Intel and Qualcomm ship their products by the millions, but SiFive has a faster new design it hopes will carve a niche. The startup on Thursday announced its Performance P650 design, which comes with a 50% speed boost over the P550 that arrived in June. SiFive is one of the most prominent members of RISC-V International, an alliance collectively developing a family of processors using the new RISC-V architecture. That competes against the x86 architecture from Intel and AMD that dominates in PCs and the Arm architecture used by Qualcomm, Samsung, Apple, MediaTek and others to power all smartphones. Unlike x86 and Arm, though, RISC-V is free to use. It's a fresh start its advocates believe will be more economical and efficient.

SiFive doesn't make chips. Instead, it licenses its designs to others that customize them for their own purposes, an approach that's served Arm well. With performance comparable to Arm's two-year-old midrange Cortex A77 design, the P650 won't be ejecting Qualcomm or other Arm designs out of smartphones any time soon. Customers can start evaluating the design in the first quarter of 2022, SiFive said. But if SiFive succeeds with its longer-term plans for better speed, battery life and cost, you could get a SiFive powered phone in a couple years. "By 2023, you're likely to see the first mobile phone with RISC-V," SiFive Chief Executive Patrick Little said in an October interview. "I think we have an excellent shot at the phone."

In yet another shift away from its traditional hardware business, Huawei has sold its x86 server unit to a state-owned Chinese firm. Light Reading reports: China company registration data confirms that the sale to Henan Information Industry Investment Co. Ltd., owned by the Henan provincial government, concluded on November 5. The size of the transaction has not been disclosed. Huawei's server business, like its once high-flying handset division, has been hit badly by US sanctions, which prevent it from obtaining the Intel chips that power 90% of the world's servers. The vendor flagged the possibility of a sale at a company event six weeks ago. Eric Xu, one of Huawei's three co-chairmen, acknowledged the server unit had "encountered difficulties" and said Huawei was in discussions with some potential investors.

"Microsoft has been mainly telling consumers that Windows 11 is meant for newer PCs," reports PC Magazine.

"However, an internet user has uploaded a video that shows the OS can actually run on a 15-year-old Pentium 4 chip from Intel." Last week, Twitter user "Carlos S.M." posted screenshots of his Pentium 4-powered PC running Windows 11. He then followed that up with a video and benchmarks to verify that his machine was running the one-core Pentium chip with only 4GB of DDR2 RAM.

To install the OS onto the system, Carlos S.M. said he used a Windows 10 PE Installer, which can be used to deploy or repair Windows via a USB drive. "Windows 11 is installed in MBR (Master Boot Record)/Legacy Boot mode, no EFI emulation involved," he added.

Of course, the OS runs a bit slow on the Pentium 4 chip. Nevertheless, it shows Windows 11 can easily run on decade-old hardware... Officially, Microsoft has said a PC must possess a newer security feature called TPM 2.0 in order to run Windows 11. To underscore the point, the company released a list of eligible CPUs, and the processors only go as far back as late 2017. However, the company has also quietly acknowledged that older PCs without TPM 2.0 can run Windows 11 — so long as the user decides to manually install the OS onto their machine...

If you do install Windows 11 on an unsupported PC, Microsoft warns your machine may not be eligible to receive automatic updates. But apparently Carlos S.M. has had no problems receiving updates for his own Pentium-powered PC. "Windows update still works on this machine and even installed the Patch Tuesday," Carlos S.M. said in a follow-up tweet.
Thanks to tlhIngan (Slashdot reader #30,335) for the tip!

It's been 10 years since the death of Steve Jobs. Michael Dell talks about his memories of the tech icon, including when Jobs tried to convince Dell to license Mac software to run on Intel-based PCs. CNET reports: Fast forward to 1993. Jobs, ousted from Apple after a fallout with the company's board in 1985, had started a new company, called Next, and created a beautiful (but expensive) workstation, with its own operating system, as well as software called WebObjects for building web-based applications. Dell says Jobs came to his house in Texas several times that year, trying to convince him to use the Next operating system on Dell PCs, by arguing that it was better than Microsoft's Windows software and could undermine the Unix workstation market being touted by Sun Microsystems. The problem, Dell says he told Jobs, was that there were no applications for it and zero customer interest. Still, Dell's company worked a little bit with Next and used WebObjects to build its first online store in the mid-'90s.

In 1997, Jobs rejoined a struggling Apple after it acquired Next for $429 million, and he pitched Dell on another business proposal (as Jobs was evaluating Apple's Mac clone licensing project, which he ultimately shut down). Jobs and his team had ported the Mac software, based on Next's Mach operating system, and had it running on the Intel x86 chips that powered Dell PCs. Jobs offered to license the Mac OS to Dell, telling him he could give PC buyers a choice of Apple's software or Microsoft's Windows OS installed on their machine. "He said, look at this -- we've got this Dell desktop and it's running Mac OS," Dell tells me. "Why don't you license the Mac OS?" Dell thought it was a great idea and told Jobs he'd pay a licensing fee for every PC sold with the Mac OS. But Jobs had a counteroffer: He was worried that licensing scheme might undermine Apple's own Mac computer sales because Dell computers were less costly. Instead, Dell says, Jobs suggested he just load the Mac OS alongside Windows on every Dell PC and let customers decide which software to use -- and then pay Apple for every Dell PC sold.

Dell smiles when he tells the story. "The royalty he was talking about would amount to hundreds of millions of dollars, and the math just didn't work, because most of our customers, especially larger business customers, didn't really want the Mac operating system," he writes. "Steve's proposal would have been interesting if it was just us saying, "OK, we'll pay you every time we use the Mac OS" -- but to pay him for every time we didn't use it ... well, nice try, Steve!" Another problem: Jobs wouldn't guarantee access to the Mac OS three, four or five years later "even on the same bad terms." That could leave customers who were using Mac OS out of luck as the software evolved, leaving Dell Inc. no way to ensure it could support those users. Still, Dell acknowledges the deal was a what-could-have-been moment in history. [...] That different direction led to Jobs continuing to evolve the Next-inspired Mac OS and retooling the Mac product line, including adding the candy-colored iMac in mid-1998.

AMD's CFO Devinder Kumar has commented that AMD stands ready to manufacture Arm chips if needed, noting that the company's customers want to work with AMD on Arm-based solutions. From a report: Kumar's remarks came during last week's Deutsche Bank Technology Conference, building on comments from AMD CEO Lisa Su earlier in the year that underscored the company's willingness to create custom silicon solutions for its customers, be they based on x86 or Arm architectures. Intel also intends to produce Arm and RISC-V chips, too, meaning that the rise of non-x86 architectures will be partially fueled by the stewards of the dominant x86 ecosystem. "But I'll tell you from my standpoint, when you look at compute solutions, whether it's x86 or ARM or even other areas, that is an area for our focus on investment for us," AMD CFO Devinder Kumar responded to a question about the company's view of competing Arm chips. "We know compute really well. Even ARM, as you referenced, we have a very good relationship with ARM. And we understand that our customers want to work with us with that particular product to deliver the solutions. We stand ready to go ahead and do that even though it's not x86, although we believe x86 is a dominant strength in that area."

Apple wants to hire a programmer who knows about RISC-V, a processor technology that competes with the Arm designs that power iPhones, iPads and newer Macs. The company's interest emerged in a job posting for a "RISC-V high performance programmer" that Apple published Thursday. From a report: It's not clear exactly what Apple's plans are for the technology. Landing even a supporting role in an Apple product would be a major victory for RISC-V allies seeking to establish their technology as an alternative to older chip families like Arm or Intel's x86.

One of the RISC-V's creators is seminal processor designer David Patterson, and startups like SiFive and Esperanto Technologies are commercializing RISC-V designs. The job description offers some details about Apple's plans. The programmer will work on a team that's "implementing innovative RISC-V solutions and state of the art routines. This is to support the necessary computation for such things as machine learning, vision algorithms, signal and video processing," the job description says.

Intel has spent much of 2021 announcing plans for its future: a new IDM 2.0 strategy, new naming schemes for its process nodes, and new desktop GPUs. At Intel's Architecture Day 2021, we finally got a preview of how some of those changes are coming together in new chips, starting with the upcoming Alder Lake lineup later this year. From a report: As the company has been teasing since last year's Architecture Day, Alder Lake will feature Intel's latest hybrid architecture: instead of simply offering the next generation of powerful Intel CPU cores, it'll offer a mix of both performance and efficiency x86 cores, both of which Intel previewed as part of its announcements. Additionally, Alder Lake will be the first chip released on Intel's newly renamed Intel 7 technology node (not to be confused with Intel 4, which was previously known as Intel's delayed 7nm node, and will be available to consumers sometime in 2023 under the codename "Meteor Lake"). Intel 7 still uses similar technology to the company's current 10nm tech, instead of the bigger leap in manufacturing processes planned for Intel 4.

The new x86 performance core -- codenamed "Golden Cove" -- is the successor to the Willow Cove cores that are currently found in the company's 11th Gen Tiger Lake processors. Intel claims that it's the most powerful CPU core its ever built, but the company only offered a comparison to its Cypress Cove cores (the version of its 10nm architecture that Intel ported to its 14nm process), not the more advanced Willow Cove cores. Meanwhile, the company's new x86 Efficient core (codenamed "Gracemont") aims to be "the world's most efficient x86 CPU core" while still offering higher IPC than the company's Skylake chips. Intel claims that for single-thread cases, one of its new efficient cores hits 40 percent more performance at the same power (or similar performance while using 40 percent of the power) of a Skylake core, improvements that double when comparing four Efficient cores running four threads to two Skylake cores running four threads.

An anonymous reader shares a report: Today's announcement from SiFive comes in two parts; this part is significant as it recognizes that Intel will be enabling SiFive's IP portfolio on its 7nm manufacturing process for upcoming foundry customers. We are expecting Intel to offer a wide variety of its own IP, such as some of the x86 cores, memory controllers, PCIe controllers, and accelerators, however the depth of its third party IP support has not been fully established at this point. SiFive's IP is the first (we believe) official confirmation of specific IP that will be supported. Announced earlier this year by Pat Gelsinger, Intel Foundry Services (or IFS) is one prong of Intel's strategy to realign itself with the current and future semiconductor market. Despite having attempted to become a foundry player in the past, whereby they build chips under contract for their customers, it hasn't really worked out that well -- however IFS is a new reinvigoration of that idea, this time with more emphasis on getting it right and expanding the scope.

AmiMoJo shares a report from Phoronix: The Linux x86/x86_64 kernel code already had logic in place for reserving portions of the first 1MB of RAM to avoid the BIOS or kernel potentially clobbering that space among other reasons while now Linux 5.13 is doing away with that 'wankery' and will just unconditionally always reserve the first 1MB of RAM. The Linux kernel was already catering to Intel Sandy Bridge graphics accessing memory below the 1MB mark, the first 64K of memory are known to be corrupted by some BIOSes, and similar problems coming up in that low area of memory. But rather than dealing with all that logic and other possible niche cases besides the EGA/VGA frame-buffer and BIOS, the kernel is playing it safe and just always reserving the first 1MB of RAM so it will not get clobbered by the kernel.

Long-time Slashdot reader Dputiger writes: Go looking for the difference between x86 and ARM CPUs, and you'll run into the idea of CISC versus RISC immediately. But 40 years after the publication of David Patterson and David Ditzel's 1981 paper, "The Case for a Reduced Instruction Set Computer," CISC and RISC are poor top-level categories for comparing these two CPU families.
ExtremeTech writes:
The problem with using RISC versus CISC as a lens for comparing modern x86 versus ARM CPUs is that it takes three specific attributes that matter to the x86 versus ARM comparison — process node, microarchitecture, and ISA — crushes them down to one, and then declares ARM superior on the basis of ISA alone. The ISA-centric argument acknowledges that manufacturing geometry and microarchitecture are important and were historically responsible for x86's dominance of the PC, server, and HPC market. This view holds that when the advantages of manufacturing prowess and install base are controlled for or nullified, RISC — and by extension, ARM CPUs — will typically prove superior to x86 CPUs.

The implementation-centric argument acknowledges that ISA can and does matter, but that historically, microarchitecture and process geometry have mattered more. Intel is still recovering from some of the worst delays in the company's history. AMD is still working to improve Ryzen, especially in mobile. Historically, both x86 manufacturers have demonstrated an ability to compete effectively against RISC CPU manufacturers.

Given the reality of CPU design cycles, it's going to be a few years before we really have an answer as to which argument is superior. One difference between the semiconductor market of today and the market of 20 years ago is that TSMC is a much stronger foundry competitor than most of the RISC manufacturers Intel faced in the late 1990s and early 2000s. Intel's 7nm team has got to be under tremendous pressure to deliver on that node.

Nothing in this story should be read to imply that an ARM CPU can't be faster and more efficient than an x86 CPU.