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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.
업데이트: 13분 22초 지남

[$] LWN.net Weekly Edition for December 19, 2019

목, 2019/12/19 - 9:25오전
The LWN.net Weekly Edition for December 19, 2019 is available.
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[$] A year-end wrap-up from LWN

목, 2019/12/19 - 6:20오전
2019 is coming to a close. It has been another busy year with a lot going on in the Linux and free-software communities. Here at LWN, we have a longstanding tradition of looking back at the predictions made in January to see just how badly we did; it's not good to go against tradition no matter how embarrassing the results might be, so we might as well get right into it.
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[$] Fedora and optical media testing

목, 2019/12/19 - 6:04오전
Once upon a time, Linux was installed from a stack of floppy disks—thankfully cassette tape "drives" were long in the past at that point—but floppies were superseded by optical media, first CDs and then DVDs. These days, those options are starting to fade away in most new computer systems; just as it is now rather hard to find a floppy-based Linux installer, not to mention the media and drives themselves, someday optical media installation will disappear as well. For Fedora, that day has not truly arrived, though a somewhat confusingly presented proposal on the Fedora devel mailing list is, to a limited extent, a step in that direction.
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Stable kernel updates

목, 2019/12/19 - 12:53오전
Stable kernels 5.4.4, 5.3.17, 4.19.90, and 4.14.159 have been released. They all contain important fixes and users should upgrade.
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Security updates for Wednesday

목, 2019/12/19 - 12:45오전
Security updates have been issued by Debian (debian-edu-config, harfbuzz, libvorbis, and python-ecdsa), Fedora (chromium, fribidi, libssh, and openslp), openSUSE (chromium), Oracle (grub2), Red Hat (rh-maven35-apache-commons-beanutils), SUSE (kernel, libssh, mariadb, samba, and xen), and Ubuntu (openjdk-8, openjdk-lts).
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[$] One million ought to be enough for anybody

수, 2019/12/18 - 7:44오전
Programming languages generally have limits—explicit or implicit—on various aspects of their operation. Things like the maximum length of an identifier or the range of values that a variable can store are fairly obvious examples, but there are others, many of which are unspecified by the language designers and come about from various implementations of the language. That ambiguity has consequences, so nailing down a wide variety of limits in Python is the target of an ongoing discussion on the python-dev mailing list.
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SpamAssassin 3.4.3 available

수, 2019/12/18 - 2:04오전
SpamAssassin 3.4.3 has been released. It includes a new plugin for finding macros in Office documents, a couple of security fixes, and various other improvements. The project is also letting it be known that, due to the dropping of support for rulesets with SHA-1 signatures, versions of SpamAssassin prior to 3.4.2 will no longer be able to download rule updates as of the beginning of March.
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Security updates for Tuesday

수, 2019/12/18 - 12:55오전
Security updates have been issued by Debian (libssh, ruby2.3, and ruby2.5), Fedora (kernel and libgit2), openSUSE (chromium and libssh), Oracle (openslp), Red Hat (container-tools:1.0, container-tools:rhel8, freetype, kernel, and kpatch-patch), Scientific Linux (openslp), SUSE (git and LibreOffice), and Ubuntu (graphicsmagick).
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Wong: XFS - 2019 Development Retrospective

화, 2019/12/17 - 2:51오전
XFS filesystem maintainer Darrick Wong summarizes the significant XFS developments from the last year. "The year 2038 poses a special problem for Linux -- any signed 32-bit seconds counter will overflow back to 1901. Work is underway in the kernel to extend all of those counters to support 64-bit counters fully. In 2020, we will begin work on extending XFS's metadata (primarily inode timestamps and quota expiration timer) to support timestamps out to the year 2486. It should be possible to upgrade to existing V5 filesystems."
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Stable kernel updates

화, 2019/12/17 - 12:32오전
Stable kernels 5.4.3, 5.3.16, and 4.19.89 have been released. They all contain important fixes throughout the tree and users should upgrade.
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Security updates for Monday

화, 2019/12/17 - 12:25오전
Security updates have been issued by Debian (davical, intel-microcode, libpgf, php-horde, spamassassin, spip, and thunderbird), Mageia (clementine, dnsmasq, git, jasper, kdelibs4, kernel, libcroco, libgit2, libvirt, ncurses, openafs, proftpd, qbittorrent, signing-party, squid, and wireshark), openSUSE (java-1_8_0-openjdk and postgresql), Oracle (kernel), Red Hat (chromium-browser and openslp), and SUSE (kernel, libssh, and xen).
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Kernel prepatch 5.5-rc2

월, 2019/12/16 - 12:00오후
The second 5.5 kernel prepatch is out. "Things look normal - rc2 is usually fairly calm, and so it was this week too."
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Russian police raid NGINX Moscow office

일, 2019/12/15 - 11:52오후
ZDNet reports on a police raid at the NGINX office. "Moscow police executed the raid after last week the Rambler Group filed a copyright violation against NGINX Inc., claiming full ownership of the NGINX web server code. The Rambler Group is the parent company of rambler.ru, one of Russia's biggest search engines and internet portals. According to copies of the search warrant posted on Twitter today, Rambler claims that Igor Sysoev developed NGINX while he was working as a system administrator for the company, hence they are the rightful owner of the project."
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[$] Explicit pinning of user-space pages

토, 2019/12/14 - 12:52오전
The saga of get_user_pages() — and the problems it causes within the kernel — has been extensively chronicled here; see the LWN kernel index for the full series. In short, get_user_pages() is used to pin user-space pages in memory for some sort of manipulation outside of the owning process(es); that manipulation can sometimes surprise other parts of the kernel that think they have exclusive rights to the pages in question. This patch series from John Hubbard does not solve all of the problems, but it does create some infrastructure that may make a solution easier to come by.
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Security updates for Friday

금, 2019/12/13 - 11:02오후
Security updates have been issued by Fedora (knot-resolver and xen), openSUSE (kernel), and SUSE (haproxy, kernel, and openssl).
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[$] Buffered I/O without page-cache thrashing

목, 2019/12/12 - 11:59오후
Linux offers two modes for file I/O: buffered and direct. Buffered I/O passes through the kernel's page cache; it is relatively easy to use and can yield significant performance benefits for data that is accessed multiple times. Direct I/O, instead, goes straight between a user-space buffer and the storage device. It can be much faster for situations where caching by the operating system isn't necessary, but it is complex to use and contains traps for the unwary. Now, it seems, Jens Axboe has come up with a way to get many of the benefits of direct I/O with a lot less bother.
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Security updates for Thursday

목, 2019/12/12 - 11:07오후
Security updates have been issued by CentOS (firefox and nss-softokn), Fedora (samba), Oracle (nss, nss-softokn, nss-util, nss-softokn, and thunderbird), Scientific Linux (thunderbird), SUSE (firefox), and Ubuntu (librabbitmq and samba).
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