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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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Kernel prepatch 5.13-rc4

월, 2021/05/31 - 10:06오전
The fourth 5.13 kernel prepatch is out for testing. "So after two small rc releases, the other show finally dropped, and rc4 is fairly sizable."
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AlmaLinux 8.4 released

토, 2021/05/29 - 5:06오전
AlmaLinux 8.4, a clone of RHEL filling the role that CentOS used to play, has been released. Changes include full support for secure boot, a developer repository with packages not found in RHEL, and more; see the release notes for details.
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[$] Top-tier memory management

토, 2021/05/29 - 12:07오전
Modern computing systems can feature multiple types of memory that differ in their performance characteristics. The most common example is NUMA architectures, where memory attached to the local node is faster to access than memory on other nodes. Recently, persistent memory has started appearing in deployed systems as well; this type of memory is byte-addressable like DRAM, but it is available in larger sizes and is slower to access, especially for writes. This new memory type makes memory allocation even more complicated for the kernel, driving the need for a method to better manage multiple types of memory in one system.
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Stable kernels 5.12.8, 5.10.41, and 5.4.123

토, 2021/05/29 - 12:05오전
The 5.12.8, 5.10.41, and 5.4.123 stable kernels have been released. These contain only a small handful of changes, including fixes to the BPF verifier to address a privilege escalation vulnerability. Users of those series should upgrade.
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Security updates for Friday

금, 2021/05/28 - 11:41오후
Security updates have been issued by Debian (nginx), Fedora (chromium, curl, kernel, php-symfony3, php-symfony4, python-lxml, python-pip, and runc), Mageia (ceph and wireshark), openSUSE (mpv), Oracle (bind, idm:DL1, redis:6, slapi-nis, squid:4, and xorg-x11-server), SUSE (curl, nginx, postgresql10, postgresql12, postgresql13, slurm, slurm_18_08, and slurm_20_11), and Ubuntu (nginx).
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Reports from the 2021 Python Language Summit

금, 2021/05/28 - 12:53오전
Over on the Python Software Foundation blog, the reports from day 1 of the Python Language Summit are available. At the time of this writing, a few from day 2 are ready as well. There are lots of interesting topics discussed at the summit, including a talk on making CPython faster from Python creator Guido van Rossum. "Seven months ago, Guido van Rossum left a brief retirement to work at Microsoft. He was given the freedom to pick a project and decided to work on making CPython faster. Microsoft will be funding a small team consisting of Guido van Rossum, Mark Shannon, Eric Snow, and possibly others. [...] The team is optimistic about doubling CPython's speed for 3.11. They plan to try an adaptive, specializing byte code interpreter, which is a bit like the existing inline cache and a bit like the shadow byte code covered in Dino Viehland's talk." Some of the ideas go back to Shannon's thoughts on speeding up the interpreter that we looked at back in December.
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[$] printk() indexing

목, 2021/05/27 - 11:53오후
When kernel developers want to communicate something about the state of a running kernel, they tend to use printk(); that results in a log entry that is intended — with varying success — to be human-readable. As it happens, though, the consumers of that information are often not human; the kernel's log output is also read by automated monitoring systems that are looking for problems. The result is an impedance mismatch that often ends with the monitoring system missing important messages. The printk() format indexing patch set is the latest of many attempts to improve this situation.
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Security updates for Thursday

목, 2021/05/27 - 10:36오후
Security updates have been issued by Debian (djvulibre), Fedora (slapi-nis and upx), Gentoo (ceph and nginx), openSUSE (python-httplib2 and rubygem-actionpack-5_1), Slackware (curl), SUSE (curl, libX11, and python-httplib2), and Ubuntu (isc-dhcp, lz4, and nginx).
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[$] LWN.net Weekly Edition for May 27, 2021

목, 2021/05/27 - 10:44오전
The LWN.net Weekly Edition for May 27, 2021 is available.
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[$] Turmoil at the freenode IRC network

목, 2021/05/27 - 5:15오전
Internet Relay Chat (IRC) is a longstanding protocol—or series of protocols—for creating online, text-based chat rooms. While many of the "channels" (as chat rooms are usually called) are highly useful to a wide variety of projects and organizations, including much of the free-software world, IRC seems to have a community that suffers from more than its fair share of disagreements, hostile forks, vitriol, and other types of divisiveness. It is perhaps no huge surprise, then, that the IRC world is currently undergoing another of its periodic upheavals. The largest IRC network, freenode, is embroiled in a messy dispute that has led to the mass resignation of many of its volunteer staff, the founding of a competitor network (run by the former staff), and its abandonment by multiple high-profile projects.
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A set of stable kernels

목, 2021/05/27 - 12:07오전
Stable kernels 5.12.7, 5.10.40, 5.4.122, 4.19.192, 4.14.234, 4.9.270, and 4.4.270 have been released. As usual, they contain important fixes and users should upgrade.
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Security updates for Wednesday

수, 2021/05/26 - 11:55오후
Security updates have been issued by Arch Linux (djvulibre, dotnet-runtime, dotnet-runtime-3.1, dotnet-sdk, dotnet-sdk-3.1, gupnp, hivex, lz4, matrix-synapse, prometheus, python-pydantic, runc, thunderbird, and websvn), Fedora (composer, moodle, and wordpress), Gentoo (bash, boost, busybox, containerd, curl, dnsmasq, ffmpeg, firejail, gnome-autoar, gptfdisk, icu, lcms, libX11, mariadb, mumble, mupdf, mutt, mysql, nettle, nextcloud-client, opensmtpd, openssh, openvpn, php, postgresql, prosody, rxvt-unicode, samba, screen, smarty, spamassassin, squid, stunnel, tar, tcpreplay, and telegram-desktop), openSUSE (Botan), Red Hat (kernel), Slackware (gnutls), SUSE (hivex, libu2f-host, and rubygem-actionpack-5_1), and Ubuntu (apport, exiv2, and libx11).
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Magit 3.0 released

수, 2021/05/26 - 1:34오전
Version 3.0 of Magit, a Git interface that runs inside emacs, has been released. "The big change are the completely reworked menus used to select arguments and invoke suffix commands. Magit now uses the Transient package to implement these menus." See the release notes for more details.
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[$] Julia 1.6 addresses latency issues

수, 2021/05/26 - 1:31오전
On March 24, version 1.6.0 of the Julia programming language was released. This is the first feature release since 1.0 came out in 2018. The new release significantly reduces the "time to first plot", which is a common source of dissatisfaction for newcomers to the language, by parallelizing pre-compilation, downloading packages more efficiently, and reducing the frequency of just-in-time re-compilations at run time.
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Security updates for Tuesday

화, 2021/05/25 - 11:52오후
Security updates have been issued by Fedora (python-eventlet), openSUSE (grub2 and mpv), and Red Hat (kpatch-patch and rh-ruby25-ruby).
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Inkscape 1.1 released

화, 2021/05/25 - 7:40오전
Version 1.1 of the Inkscape vector image editor has been released. "Among the highlights in Inkscape 1.1 are a Welcome dialog, a Command Palette, a revamped Dialog Docking System, and searchable preference options, along with new formats for exporting your work."
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[$] Multi-generational LRU: the next generation

화, 2021/05/25 - 12:25오전
The multi-generational LRU patch set is a significant reworking of the kernel's memory-management subsystem that promises better performance for a number of workloads; it was covered here in April. Since then, two new versions of that work have been released by developer Yu Zhao, with version 3 being posted on May 20. Some significant changes have been made since the original post, so another look is in order.
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Security updates for Monday

화, 2021/05/25 - 12:03오전
Security updates have been issued by Debian (libx11, prosody, and ring), Fedora (ceph, glibc, kernel, libxml2, python-pip, slurm, and tpm2-tss), Mageia (bind, libx11, mediawiki, openjpeg2, postgresql, and thunderbird), openSUSE (Botan, cacti, cacti-spine, chromium, djvulibre, fribidi, graphviz, java-1_8_0-openj9, kernel, libass, libxml2, lz4, and python-httplib2), and Slackware (expat).
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Kernel prepatch 5.13-rc3

월, 2021/05/24 - 11:14오전
The third 5.13 kernel prepatch is out for testing. "It's been a very calm rc3 week, and at least in pure number of commits this is the smallest rc3 we've had in the 5.x series. Considering that the merge window was not in any way small, this is a bit surprising, but I suspect it's one of those 'not everybody sent in fixes this week' things that will rectify itself next week."
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Saturday Stable kernels

일, 2021/05/23 - 8:02오전
The 5.12.6, 5.10.39, 5.4.121, 4.19.191, 4.14.233, 4.9.269, and 4.4.269 stable kernels have all been released; each contains yet another set of important fixes.
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