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Thursday March 30, 2017. 04:00 AM
The LWN.net Weekly Edition for March 30, 2017 is available.
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Wednesday March 29, 2017. 07:24 PM
The overlayfs filesystem is being used more and more these days, especially in conjunction with containers. Amir Goldstein and Miklos Szeredi led a discussion about recent and upcoming features for the filesystem at LSFMM 2017.
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Memory-management (MM) patches are notoriously difficult to get merged into the mainline kernel. They are subjected to a high degree of review because this is an area where it is easy to get things wrong. Or, at least, that is how it used to be. The final memory-management...
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Security updates have been issued by CentOS (icoutils and openjpeg), Debian (eject, graphicsmagick, libytnef, and tnef), Fedora (drupal8, firefox, kernel, ntp, qbittorrent, texlive, and webkitgtk4), Oracle (bash, coreutils, glibc, gnutls, kernel, libguestfs, ocaml, openssh,...
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David Malcolm has put together the beginnings of an unofficial guide to GCC for developers who are getting started with the compiler. 'I’m a relative newcomer to GCC, so I thought it was worth documenting some of the hurdles I ran into when I started working on GCC, to try ...
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The userfaultfd() system call allows user space to intervene in the handling of page faults. As Andrea Arcangeli and Mike Rapaport described in a 2017 Linux Storage, Filesystem, and Memory-Management Summit session dedicated to the subject, userfaultfd() was originally...
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Tuesday March 28, 2017. 09:57 PM
A processor's translation lookaside buffer (TLB) caches the mappings from virtual to physical addresses. Looking up virtual addresses is expensive, so good performance often depends on making the best use of the TLB. In the memory-management track of the 2017 Linux Storage,...
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Version 1.6 of the Kubernetes orchestration system is available. 'In this release the community’s focus is on scale and automation, to help you deploy multiple workloads to multiple users on a cluster. We are announcing that 5,000 node clusters are supported. We moved...
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Google has announced the launch of opensource.google.com. 'Today, we’re launching opensource.google.com, a new website for Google Open Source that ties together all of our initiatives with information on how we use, release, and support open source. This new site showcases ...
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When the transparent huge page feature was added to the kernel, it only supported anonymous (non-file-backed) memory. In 2016, support for huge pages in the page cache was added, but only the tmpfs filesystem was supported. There is interest in expanding support to other...
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Security updates have been issued by Debian (eject, gst-plugins-bad1.0, gst-plugins-base1.0, gst-plugins-good1.0, gst-plugins-ugly1.0, gstreamer1.0, php5, and tiff), Fedora (kernel), Gentoo (curl, deluge, libtasn1, and xen-tools), Mageia (mbedtls, putty, and roundcubemail),...
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DAX is the mechanism that enables direct access to files stored in persistent memory arrays without the need to copy the data through the page cache. At the 2017 Linux Storage, Filesystem, and Memory-Management Summit, Ross Zwisler led a plenary session on the future of DAX. ...
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Monday March 27, 2017. 11:20 PM
DragonFly BSD 4.8 has been released. 'DragonFly version 4.8 brings EFI boot support in the installer, further speed improvements in the kernel, a new NVMe driver, a new eMMC driver, and Intel video driver updates.' DragonFly is an independent BSD variant, perhaps best known...
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The Free Software Foundation has announced the winners of the 2016 Free Software Awards. The Award for Projects of Social Benefit went to SecureDrop and the Award for the Advancement of Free Software went to Alexandre Oliva. 'SecureDrop is an anonymous whistleblowing...
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Stable kernels 4.10.6, 4.9.18, and 4.4.57 have been released. All of them contain important fixes and users should upgrade.
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Security updates have been issued by Debian (apt-cacher, jbig2dec, libplist, python3.2, tnef, and xrdp), Fedora (firefox, mbedtls, and sane-backends), Mageia (flash-player-plugin, freetype2, glibc, kernel, kernel-linus, kernel-tmb, libquicktime, libwmf, and tnef), and Ubuntu ...
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Sunday March 26, 2017. 11:57 PM
The 4.11-rc4 kernel prepatch is out for testing. 'So on the whole things look fine. There's changes all over, and in mostly the usual proportions. Some core kernel code shows up in the diffstat slightly more than it usually does - we had an audit fix and a bpf hashmap fix,...
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In the memory-management subsystem, the term "mapping" refers to the connection between pages in memory and their backing store — the file that represents them on disk. One of the fundamental assumptions in the kernel is that a given page in the page cache belongs to...
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Friday March 24, 2017. 07:49 PM
The Eudyptula Challenge is a series of programming exercises for the Linux kernel. It starts from a very basic 'Hello world' kernel module, moves up in complexity to getting patches accepted into the main kernel. The challenge will be closed to new participants in a few...
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Security updates have been issued by Arch Linux (libpurple), Debian (audiofile, cgiemail, and imagemagick), Fedora (cloud-init, empathy, and mupdf), Mageia (firefox and thunderbird), Scientific Linux (icoutils and openjpeg), Slackware (mcabber and samba), and Ubuntu (eglibc).
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