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Pahole (originally "Poke-a-hole") is a Swiss Army knife for exploring and editing debug information. Pahole is also currently involved in the kernel's build process to rearrange the information produced by various compilers into a form useful to the BPF verifier, although there are plans to render it unnecessary. Pahole maintainer Arnaldo Carvalho de Melo shared some status updates about the project at the 2025 Linux Storage, Filesystem, Memory-Management, and BPF summit. Interested readers can find his slides here.

AmiMoJo writes: The Shenzhen 8K UHD Video Industry Cooperation Alliance, a group made up of more than 50 Chinese companies, just released a new wired media communication standard called the General Purpose Media Interface or GPMI. This standard was developed to support 8K and reduce the number of cables required to stream data and power from one device to another. According to HKEPC, the GPMI cable comes in two flavors -- a Type-B that seems to have a proprietary connector and a Type-C that is compatible with the USB-C standard. Because 8K has four times the number of pixels of 4K and 16 times more pixels than 1080p resolution, it means that GPMI is built to carry a lot more data than other current standards. There are other variables that can impact required bandwidth, of course, such as color depth and refresh rate. The GPMI Type-C connector is set to have a maximum bandwidth of 96 Gbps and deliver 240 watts of power. This is more than double the 40 Gbps data limit of USB4 and Thunderbolt 4, allowing you to transmit more data on the cable. However, it has the same power limit as that of the latest USB Type-C connector using the Extended Power Range (EPR) standard. GPMI Type-B beats all other cables, though, with its maximum bandwidth of 192 Gbps and power delivery of up to 480 watts.

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An anonymous reader shares a report: Waymo is preparing to use data from its robotaxis, including video from interior cameras tied to rider identities, to train generative AI models, according to an unreleased version of its privacy policy found by researcher Jane Manchun Wong. The draft language reveals Waymo may also share this data to personalize ads, raising fresh questions about how much of a rider's behavior inside autonomous vehicles could be repurposed for AI training and marketing. The privacy page states: "Waymo may share data to improve and analyze its functionality and to tailor products, services, ads, and offers to your interests. You can opt out of sharing your information with third parties, unless it's necessary to the functioning of the service."

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ACM Queue looks at the security problem in the light of a report on Multics security that was published in 1974.

We are all struggling with a massive shift that has happened in the past 10 or 20 years in the software industry. For decades, software reuse was only a lofty goal. Now it's very real. Modern programming environments such as Go, Node, and Rust have made it trivial to reuse work by others, but our instincts about responsible behaviors have not yet adapted to this new reality.

The fact that the 1974 Multics review anticipated many of the problems we face today is evidence that these problems are fundamental and have no easy answers. We must work to make continuous improvements to open source software supply chain security, making attacks more and more difficult and expensive.

The United Kingdom has banned "outrageous fake reviews and sneaky hidden fees" to make life easier for online shoppers. From a report: New measures under the Digital Markets, Competition, and Consumer Act 2024 came into force on Sunday that require online platforms to transparently include all mandatory fees within a product's advertised price, including booking or admin charges. The law targets so-called "dripped pricing," in which additional fees -- like platform service charges -- are dripped in during a customer's checkout process to dupe them into paying a higher price than expected. The ban "aims to bring to an end the shock that online shoppers get when they reach the end of their shopping experience only to find a raft of extra fees lumped on top," according to Justin Madders, the UK's Minister for Employment Rights, Competition and Markets.

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The internet's physical mass remains contested among scientists, with estimates ranging from a strawberry to something almost unimaginably small. In 2006, Harvard physicist Russell Seitz calculated the internet weighed roughly 50 grams based on server energy, a figure that would now equate to potato-weight given internet growth. Christopher White, president of NEC Laboratories America, has dismissed this calculation as "just wrong." White suggests a more accurate method that accounts for the energy needed to encode all internet data in one place, yielding approximately 53 quadrillionths of a gram at room temperature. Alternatively, if the internet's projected 175 zettabytes of data were stored in DNA -- a storage medium scientists are actively exploring -- it would weigh 960,947 grams, equivalent to 10.6 American males. Though scientists debate measurement methods, White asserts the web's true complexity makes it "essentially unknowable."

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Apple rushed five planeloads of iPhones from India to the U.S. in just three days to beat new tariffs imposed by the Trump administration, Times of India reported Monday, citing sources. The urgent shipments during the final week of March aimed to avoid the 10% reciprocal tariff that took effect on April 5. The stockpiling will allow Apple to maintain current pricing temporarily. "The reserves that arrived at lower duty will temporarily insulate the company from the higher prices that it will need to pay for new shipments," the Indian daily cited a source as saying. The Trump administration also announced a 26% reciprocal tariff to be implemented on April 9, potentially accelerating Apple's manufacturing shift away from China. India offers a significant tariff advantage, with Indian exports facing a 26% tariff to the U.S. compared to 54% on Chinese goods. Further reading: India's Economic Chess Against Twin US Economic Threats.

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President Donald Trump signaled a potential diplomatic opening amid his aggressive tariff strategy on Monday, threatening China with an additional 50% tariff while simultaneously offering other nations a path to negotiate lower trade barriers. The ultimatum to Beijing demands China withdraw a 34% increase by April 8, 2025, or face supplementary tariffs effective April 9, which would push total levies on Chinese goods to 104% or higher. Trump has already imposed a 20% tariff over fentanyl concerns and a 34% tariff related to trade issues. "Negotiations with other countries, which have requested meetings, will begin taking place immediately," Trump wrote on social media, marking a shift from the administration's previously unyielding stance.

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The kernel's swap subsystem is complex and highly optimized — though not always optimized for today's workloads. In three adjacent sessions during the memory-management track of the 2025 Linux Storage, Filesystem, Memory-Management, and BPF Summit, Kairui Song, Nhat Pham, and Usama Arif all talked about some of the problems that they are trying to solve in the Linux swap subsystem. In the first two cases, the solutions take the form of an additional layer of indirection in the kernel's swap map; the third, which enables swap-in of large folios, may or may not be worthwhile in the end.

A court has blocked a British government attempt to keep secret a legal case over its demand to access Apple user data. From a report: The UK Investigatory Powers Tribunal, a special court that handles cases related to government surveillance, said the authorities' efforts were a "fundamental interference with the principle of open justice" in a ruling issued on Monday. The development comes after it emerged in January that the British government had served Apple with a demand to circumvent encryption that the company uses to secure user data stored in its cloud services. Apple challenged the request, while taking the unprecedented step of removing its advanced data protection feature for its British users. The government had sought to keep details about the demand -- and Apple's challenge of it -- from being publicly disclosed. Apple has regularly clashed with governments over encryption features that can make it difficult for law enforcement to access devices produced by the company. The world's most valuable company last year criticized UK surveillance powers as "unprecedented overreach" by the government.

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Linus Torvalds released 6.15-rc1 and closed the 6.15 merge window on April 6. By that time, 12,633 non-merge changesets had found their way into his repository; that is substantially more than were merged during the entire 6.14 development cycle. Just under 6,000 of those changesets were merged after the first-half merge-window summary was written.

Microsoft's AI chief Mustafa Suleyman says the company has deliberately chosen to build AI models "three or six months behind" cutting-edge developments, citing cost savings and more focused implementation. "It's cheaper to give a specific answer once you've waited for the first three or six months for the frontier to go first. We call that off-frontier," Suleyman told CNBC. "That's actually our strategy, is to really play a very tight second, given the capital-intensiveness of these models." Microsoft owns substantial Nvidia GPU capacity but sees no need to develop "the absolute frontier, the best model in the world first," as it would be "very, very expensive" and create unnecessary duplication, Suleyman said. Despite its $13.75 billion investment in OpenAI, Microsoft added the startup to its list of competitors in July 2024. OpenAI subsequently announced a partnership with Oracle on its $500 billion Stargate project, departing from exclusive reliance on Microsoft's Azure cloud. "Look, it's absolutely mission-critical that long-term, we are able to do AI self-sufficiently at Microsoft," Suleyman said, while stressing the partnership with OpenAI would continue "until 2030 at least."

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The 6.14.1, 6.13.10, 6.12.22, 6.6.86, and 6.1.133 stable kernels have all been released. They contain a relatively small collection of important fixes across the kernel tree.

Security updates have been issued by Debian (abseil, atop, jetty9, ruby-saml, tomcat10, trafficserver, xz-utils, and zfs-linux), Fedora (chromium, condor, containernetworking-plugins, cri-tools1.29, crosswords-puzzle-sets-xword-dl, exim, ghostscript, matrix-synapse, upx, varnish, and yarnpkg), Gentoo (XZ Utils), Mageia (augeas, corosync, nss & firefox, and thunderbird), Oracle (container-tools:ol8, firefox, freetype, and kernel), Red Hat (firefox), SUSE (chromium, gn, firefox-esr, go1.23-1.23.8, go1.24, go1.24-1.24.2, google-guest-agent, govulncheck-vulndb, gsl, python311-ecdsa, thunderbird, and webkit2gtk3), and Ubuntu (kamailio, libdbd-mysql-perl, linux-nvidia, linux-nvidia-6.8, and tomcat9).

Scientists "demonstrated a promising step toward using a person's own immune cells to fight gastrointestinal cancers" at America's National Institutes of Health (or NIH), reports the Washington Post. But the results were published in Nature Medicine on Tuesday — "the same day the agency was hit with devastating layoffs..." The treatment approach is still early in its development; the personalized immunotherapy regimen shrank tumors in only about a quarter of the patients with colon, rectal and other GI cancers enrolled in a clinical trial. But a researcher who was not involved in the study called the results "remarkable" because they highlight a path to a frustratingly elusive goal in medicine — harnessing a person's own immune defenses to target common solid tumor cancers. Until now, cell-based immunotherapy has worked mainly on blood cancers, such as leukemia, but not the solid cancers that seed tumors in the breast, brain, lungs, pancreas and GI tract... But the progress arrives at a sad time for science — and for patients, said the leader of the work, NIH immunotherapy pioneer Steven Rosenberg. Two patients' treatments using the experimental therapy had to be delayed because NIH's capacity to make personalized cell therapies has been slowed by the firing of highly skilled staff and by purchasing slowdowns. Those occurred even before major layoffs took place Tuesday... The Department of Health and Human Services (HHS) responded to an email asking about clinical trial delays with a statement: "NIH and HHS are complying with President Trump's executive order." It's "a very exciting study," said Patrick Hwu, president of the Moffitt Cancer Center in Tampa. Finding ways to tailor this cell-based immunotherapy approach to common solid tumors that cause the vast majority of cancer deaths has remained a major scientific challenge... Rosenberg and colleagues first tried to create tumor infiltrating lymphocytes [or "TILs"] using the method that worked in melanoma for 18 patients with GI cancers that had spread. It failed completely. In a second iteration, his team sequenced the mutations present in each patient's tumor and used that information to sift out and expand the TILs that could home in on that patient's specific tumor cells. The results were far from a triumph, but provided a clue — this time, three of 39 patients' tumors shrank. In the last stage of the trial, the scientists added a drug called pembrolizumab that takes the brakes off immune cells. This time, eight of the 34 patients responded. "Right now, only a few labs in the country can do what they just did," Hwu said. While Rosenberg is already working "to refine and improve upon the results," he told the Post that two scientists involved in the specialized process of preparing the cells to treat patients were fired in the probationary purge. "We've had to slow down our work and delay the treatment of some patients...." And there's also dramatically fewer people now who can purchase research materials, which the Post says it "making it slower and more difficult to obtain supplies."

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Brain rot — the inability to think deeply after too much scrolling on a phone — afflicts "plenty of people," writes the New York Times' lead consumer technology writer. [Alternate URL here.] He's suffering from it too — "These days, it's tough to even finish a book." But is the answer just avoiding distractions with a stripped-down $600 phone "that barely does anything"? For a week he tested the Light Phone III... The newest version, which began shipping in March and is set for a broader release in July, can place calls, send texts, take photos, show map directions, play music and podcasts and not do much else. There is no web browser. There is also no app store, meaning there's no Uber to hail a ride, no Slack and no social media. There isn't even email... There were moments I enjoyed it. While waiting for a train, resting at the gym or eating alone, I was not tempted to stare at the phone screen, and I felt more mindful of my surroundings. Phone calls sounded nice and clear. The maps app did a fine job navigating me around town. It reminded me of simpler times when we used phones primarily to converse before putting them away to focus on other tasks. But over the week, the downsides of a dumber phone chipped away at my enjoyment, and overall I felt more stressed and less capable. I suddenly found myself unable to get into a train station, look up the name of a new restaurant or control my garage door. Some of that has less to do with the Light Phone itself, which is a so-so product, and more to do with how society as a whole has become dependent on advanced smartphone features. For example, his old smartphone supported virtual phone-based passes for mass transit and speedy access to his gym. (And his friends made phone of the Light Phone's photos.) But at least never felt tempted to check his email when out to dinner. "While I admire the goal of the Light Phone, my experience demonstrates there's nothing we can realistically do or buy to bring us back to simpler times. So many aspects of our lives, including getting around town, working, paying for things and controlling home appliances, revolve around our highly capable smartphones. "This Light Phone experiment reminded me of glamping: paying a lot to have an artificially crummier experience."

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"Gen Z is rediscovering Tumblr — a chaotic, cozy corner of the internet untouched by algorithmic gloss and influencer overload..." writes Fast Company, "embracing the platform as a refuge from an internet saturated with influencers and algorithm fatigue." Thanks to Gen Z, the site has found new life. As of 2025, Gen Z makes up 50% of Tumblr's active monthly users and accounts for 60% of new sign-ups, according to data shared with Business Insider's Amanda Hoover, who recently reported on the platform's resurgence. User numbers spiked in January during the near-ban of TikTok and jumped again last year when Brazil temporarily banned X. In response, Tumblr users launched dedicated communities to archive and share their favorite TikToks... To keep up with the momentum, Tumblr introduced Reddit-style Communities in December, letting users connect over shared interests like photography and video games. In January, it debuted Tumblr TV — a TikTok-like feature that serves as both a GIF search engine and a short-form video platform. But perhaps Tumblr's greatest strength is that it isn't TikTok or Facebook. Currently the 10th most popular social platform in the U.S., according to analytics firm Similarweb, Tumblr is dwarfed by giants like Instagram and X. For its users, though, that's part of the appeal. First launched in 2007, Tumblr peaked at over 100 million users in 2014, according to the article. Trends like Occupy Wall Street had been born on Tumblr, notes Business Insider, calling the blogging platform "Gen Z's safe space... as the rest of the social internet has become increasingly commodified, polarized, and dominated by lifestyle influencers." Tumblr was also "one of the most hyped startups in the world before fading into obsolescence — bought by Yahoo for $1.1 billion in 2013... then acquired by Verizon, and later offloaded for fractions of pennies on the dollar in a distressed sale. "That same Tumblr, a relic of many millennials' formative years, has been having a moment among Gen Z..." "Gen Z has this romanticism of the early-2000s internet," says Amanda Brennan, an internet librarian who worked at Tumblr for seven years, leaving her role as head of content in 2021... Part of the reason young people are hanging out on old social platforms is that there's nowhere new to go. The tech industry is evolving at a slower pace than it was in the 2000s, and there's less room for disruption. Big Tech has a stranglehold on how we socialize. That leaves Gen Z to pick up the scraps left by the early online millennials and attempt to craft them into something relevant. They love Pinterest (founded in 2010) and Snapchat (2011), and they're trying out digital point-and-shoot cameras and flip phones for an early-2000s aesthetic — and learning the valuable lesson that sometimes we look better when blurrier. More Gen Zers and millennials are signing up for Yahoo. Napster, surprising many people with its continued existence, just sold for $207 million. The trend is fueled by nostalgia for Y2K aesthetics and a longing for a time when people could make mistakes on the internet and move past them. The pandemic also brought more Gen Z users to Tumblr... And Tumblr still works much like an older internet, where people have more control over what they see and rely less on algorithms. "You curate your own stuff; it takes a little bit of work to put everything in place, but when it's working, you see the content you want to see," Fjodor Everaerts, a 26-year-old in Belgium who has made some 250,000 posts since he joined Tumblr when he was 14... Under Automattic, Tumblr is finally in the home that serves it, [says Ari Levine, the head of brand partnerships at Tumblr]. "We've had ups and downs along the way, but we're in the most interesting position and place that we've been in 18 years," he says... And following media companies (including Business Insider) and social platforms like Reddit, Automattic in 2024 was making a deal with OpenAI and Midjourney to allow the systems to train on Tumblr posts. "The social internet is fractured," the article argues. ("Millennials are running Reddit. Gen Xers and Baby Boomers have a home on Facebook. Bluesky, one of the new X alternatives, has a tangible elder-millennial/Gen X vibe. Gen Zers have created social apps like BeReal and the Myspace-inspired Noplace, but they've so far generated more hype than influence....") But in a world where megaplatforms "flatten our online experiences and reward content that fits a mold," the article suggests, "smaller communities can enrich them."

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"U.S. stock market futures plunged on Sunday evening," reports Yahoo Finance, "after the new U.S. tariff policy began collecting duties over the weekend..." The EU will vote on $28 billion in retaliatory tariffs Wednesday, Reuters reports. (And those tariffs will be approved unless "a qualified majority of 15 EU members representing 65% of the EU's population oppose it. They would enter force in two stages, a smaller part on April 15 and the rest a month later.") But France's Economy and Finance Minister has an idea: more strictly regulating how data is used by America's Big Tech companies. Politico EU reports/A>: "We may strengthen certain administrative requirements or regulate the use of data," Lombard said in an interview with Le Journal Du Dimanche. He added that another option could be to "tax certain activities," without being more specific. A French government spokesperson already said last week that the EU's retaliation against U.S. tariffs could include "digital services that are currently not taxed." That suggestion was fiercely rejected by Ireland, which hosts the European headquarters of several U.S. Big Tech firms... Technology is seen as a possible area for Europe to retaliate. The European Union has a €157 billion trade surplus in goods, which means it exports more than it imports, but it runs a deficit of €109 billion in services, including digital services. Big Tech giants like Apple, Microsoft, Amazon, Google and Meta dominate many parts of the market in Europe. Amid the market turmoil, what about cryptocurrencies, often seen as a "proxy" for the level of risk felt by investors? In the 10 weeks after October 6, the price of Bitcoin skyrocketed 67% to $106,490 by December 10th. But by January 30th it had started dropping again, and now sits at $77,831 — still up 22% for the last six months, but down nearly 27% over the last 10 weeks. Yet even after all that volatility, Bitcoin suddenly fell again more than 6% on Sunday, reports Reuters, "as markets plunged amid tariff tensions. Ether, the second largest cryptocurrency, fell more than 10% on Sunday."

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"Three Microsoft CEOs walk into a room..." Satya Nadella posted on X.com, "and are interviewed by Copilot!" As part of Microsoft's 50th anniversary celebration, Microsoft CEO Nadella joined former Microsoft CEOs Bill Gates and Steve Ballmer in a funny two-minute video (also available on YouTube) in which Nadella asks Copilot for an AI-powered roast of each of them. "All right Satya," Copilot answers. "Let's spice it up..." Copilot: Steve, we'll start with you. Your enthusiasm is legendary. But do you ever worry that your energy might short-circuit the AI? I mean, even robots need a coffee break after your pep talks. Steve Ballmer: Come on dude! If you can't handle me, you can't handle a huge percentage of the world's population! We're counting on you! Copilot: Ha ha, fair point Steve. Now Bill, you've got that signature thoughtful gaze. But do you ever think the AI might feel intimidated by your intense thinking face? I mean, it's like it's waiting for a blue screen moment. Bill Gates: I hope so. I mean, it's all I've got left as the AIs get so damn intelligent. It's just that gaze and my willingness to criticize that differentiates me. Copilot: And it's a formidable gaze indeed, Bill. Steve Ballmer: Copilot, would you ever be willing to criticize him? Copilot: Absolutely. Criticism is where growth happens. Now Satya, AI seems to be your best buddy — but ever worry that your deep passion for AI could one day have it running the show, leaving you to just enjoy the ride? Satya Nadella: Well, the day AI can play like the best cricket player that I enjoy, that's the day it can run the show, as far as I'm concerned. Copilot: Touche, Satya. Let's see if it can hit a century in cricket and then we'll talk. This has been a blast, gentlemen. Here's to another 50 years of innovation and adventure. Cheers. Ballmer, Nadella, and Gates: Cheers. Bill Gates: Whatever that means to an AI. Does it drink?

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Linus has released 6.15-rc1 and closed the merge window for this release. "As expected, this was one of the bigger merge windows, almost certainly just because we had some pent-up development due to the previous releases being impacted by the holiday season. That said, while it's bigger than normal, it's not some kind of record-breaking thing.". In the end, 12.633 non-merge changesets were pulled into the mainline during this merge window.