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[$] Using dma-bufs for read and write operations

LWN.net
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The kernel's <a href="https://docs.kernel.org/driver-api/dma-buf.html">dma-buf subsystem</a> provides a way for drivers to share memory buffers, usually in order to support efficient device-to-device <span class="nobreak">I/O</span>. At the 2026 <a href="https://events.linuxfoundation.org/lsfmmbpf/">Linux Storage, Filesystem, Memory Management, and BPF Summit</a>, Pavel Begunkov, assisted by Kanchan Joshi, led a joint session of the storage and memory-management…

[$] Scaling transparent huge pages to 1GB

LWN.net
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As a general rule, when developers talk about huge pages, they are referring to PMD-level pages that are 1MB or 2MB in size, depending on the CPU architecture. Most CPUs can support other huge-page sizes, though. On x86 systems, PUD-level huge pages hold 1GB of data. Providing such large pages…

Security updates for Tuesday

LWN.net
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Security updates have been issued by <b>AlmaLinux</b> (freerdp, glib2, libsoup3, and openexr), <b>Debian</b> (dnsmasq, p7zip, p7zip-rar, python-authlib, and rails), <b>Fedora</b> (chromium, firefox, httpd, and nss), <b>SUSE</b> (java-25-openj9, krb5, libmodsecurity3, and mcphost), and <b>Ubuntu</b> (imagemagick, linux, linux-aws, linux-aws-fips, linux-aws-hwe, linux-azure-4.15, linux-fips, linux-gcp, linux-gcp-4.15, linux-gcp-fips, linux-hwe, linux-kvm, linux-oracle, linux-azure, linux-azure-fips, linux-oracle, linux-azure-5.15,…

Toothday

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All that gold has lasted half a century. With one exception.

Death to #2

Dentistry numbers your teeth. Number one is the top right back tooth. If you’ve got one, that’s a wisdom tooth, one of the four that erupted last through your gums. Your other top wisdom tooth is…

Stenberg: Mythos finds a curl vulnerability

LWN.net
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<p>Daniel Stenberg has published a <a href="https://daniel.haxx.se/blog/2026/05/11/mythos-finds-a-curl-vulnerability/">lengthy article</a> on his thoughts on Anthropic's Mythos, which the company decided was too dangerous for wide public release.</p> <blockquote class="bq"> <p>My personal conclusion can however not end up with anything else than that the big hype around this model so far was primarily…

Two stable kernels with Dirty Frag fixes

LWN.net
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<p>Greg Kroah-Hartman has released the <a href="https://lwn.net/Articles/1072312/">7.0.6</a> and <a href="https://lwn.net/Articles/1072313/">6.18.29</a> stable kernels with Hyunwoo Kim's <a href="https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71">patch</a> for the second vulnerability (<a href="https://lwn.net/ml/all/2026051149-CVE-2026-43500-60d6%40gregkh/">CVE-2026-43500</a>) reported with <a href="https://github.com/V4bel/dirtyfrag#dirty-frag-universal-linux-lpe">Dirty&#160;Frag</a> and <a href="https://www.openwall.com/lists/oss-security/2026/05/07/12">Copy&#160;Fail&#160;2</a>. All users are advised to upgrade.</p> <p></p>

[$] Providing 64KB base pages with 4KB kernels, two different ways

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Some CPU architectures are able to run with a number of different base-page sizes; using a larger size can often result in better performance at the cost of increased memory use. Other architectures are more limited. At the 2026 <a href="https://events.linuxfoundation.org/lsfmmbpf/">Linux Storage, Filesystem, Memory Management, and BPF Summit</a>, two sessions…

Debian to require reproducible builds

LWN.net
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Paul Gevers has slipped an interesting bit of news into a "<a href="https://lwn.net/ml/all/E1wLw4g-000n88-0p@respighi.debian.org">bits from the release team</a>" message: <p> <blockquote class="bq"> Aided by the efforts of the Reproducible Builds project, we've decided it's time to say that Debian must ship reproducible packages. Since yesterday, we have enabled our migration software…

Security updates for Monday

LWN.net
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Security updates have been issued by <b>AlmaLinux</b> (corosync, freeipmi, kernel, and kernel-rt), <b>Debian</b> (corosync, firefox-esr, kernel, lcms2, libpng1.6, linux-6.1, php8.2, php8.4, postorius, pyjwt, and tor), <b>Fedora</b> (dotnet10.0, exim, gnutls, kernel, nextcloud, nodejs22, php, proftpd, prosody, python-pulp-glue, python-requests, rclone, and SDL3_image), <b>Mageia</b> (firefox, nss, rootcerts, openvpn, thunderbird, and vim), <b>Oracle</b> (corosync,…

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  • LWN.net

    LWN.net is a comprehensive source of news and opinions from and about the Linux community. This is the main LWN.net feed, listing all articles which are posted to the site front page.

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  • Doc Searls Weblog

    Just trying to make stuff happen

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