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Tuesday May 14, 2019. 04:47 PM
Security updates have been issued by CentOS (flatpak, ghostscript, and python-jinja2), Debian (cups-filters, imagemagick, qt4-x11, and samba), Fedora (httpd and wpa_supplicant), openSUSE (freeradius-server, nmap, python-Jinja2, signing-party, and webkit2gtk3), Red Hat...
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<p> In the filesystems track at the 2019 Linux Storage, Filesystem, and Memory-Management Summit, Ted Ts'o led a discussion about an inode flag to indicate DAX files, which is meant to be applied to files that should be directly accessed without going through the page cache....
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Monday May 13, 2019. 04:38 PM
Security updates have been issued by Debian (atftp, ghostscript, openjdk-7, and postgresql-9.4), Fedora (java-11-openjdk, mosquitto, and php), Mageia (bash, binutils, clamav, cronie, jasper, kernel, mxml, openexr, openssh, python, qt4, svgsalamander, sysstat, tar, and...
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Saturday May 11, 2019. 04:22 PM
The latest set of stable kernel updates consists of 5.1.1, 5.0.15, 4.19.42, 4.14.118, and 4.9.175. Each contains the usual set of important fixes.
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Friday May 10, 2019. 04:05 PM
When he released the 5.1 kernel, Linus Torvalds noted that he had a family event happening in the middle of the 5.2 merge window and that he would be offline for a few days in the middle. He appears to be trying to make up for lost time before it happens: over 8,300...
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Security updates have been issued by Debian (bind9, postgresql-9.6, qemu, and symfony), Fedora (kernel, kernel-tools, mod_cluster, rubygem-actioncable, rubygem-actionmailer, rubygem-actionpack, rubygem-actionview, rubygem-activejob, rubygem-activemodel, rubygem-activerecord, ...
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Eric Rescorla has written a detailed summary of how the Firefox add-on fiasco happened, how it was addressed, and how a repeat might be avoided. 'First, we should have a much better way of tracking the status of everything in Firefox that is a potential time bomb and making...
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Thursday May 9, 2019. 06:44 PM
The 2019 Linux Storage, Filesystem, and Memory-Management Summit differed somewhat from its predecessors in that it contained a fourth track dedicated to the BPF virtual machine. LWN was unable to attend most of those sessions, but a couple of BPF-related talks were a part...
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Security updates have been issued by Fedora (drupal7, exiv2, filezilla, and libfilezilla), openSUSE (gnutls, GraphicsMagick, hostinfo, supportutils, and ovmf), Scientific Linux (flatpak and ghostscript), SUSE (mutt and samba), and Ubuntu (Monit).
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The LWN.net Weekly Edition for May 9, 2019 is available.
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<p> The idea of "inheritance" is something that most students learn about early on when they are studying object-oriented programming (OOP). But one of the seminal books about OOP recommends favoring "composition" over inheritance. Ariel Ortiz came to PyCon in Cleveland,...
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Wednesday May 8, 2019. 10:03 PM
Computer memory architecture is growing more complex over time, with different types of memory attached to a CPU via a number of paths. The kernel development community is duly working to make this memory available to user space in an equally diverse set of ways. Two...
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Christoph Lameter has spent years improving Linux for high-performance computing tasks. During the memory-management track of the 2019 Linux Storage, Filesystem, and Memory-Management Summit, he talked about the problem of keeping up with a 400Gb/s network interface. At that ...
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The mmap_sem lock used in the memory-management subsystem has been a known scalability problem for years, but it has proved difficult to remove. During a session in the memory-management track of the 2019 Linux Storage, Filesystem, and Memory-Management Summit, Laurent...
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For years, kernel developers have been told to avoid allocating large chunks of physically contiguous memory; as the system runs and memory becomes fragmented, satisfying such allocations becomes increasingly difficult. But, as Zi Yan pointed out in a memory-management track ...
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kmalloc() is one of the kernel's fundamental memory-allocation primitives for relatively small objects. Most of the time, developers don't worry about the alignment of memory returned from kmalloc(), and things generally just work. But, Vlastimil Babka said during a plenary...
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At the 2018 Linux Storage, Filesystem, and Memory-Management Summit (LSFMM), Boaz Harrosh introduced the ZUFS filesystem. At this year's event, he was back to talk about what it would take to merge ZUFS into the mainline. ZUFS, which Harrosh pronounced as both 'zoo-eff-ess'...
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Stable kernels 5.0.14, 4.19.41, 4.14.117, and 4.9.174 have been released. As usual there are important fixes and users should upgrade.
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Security updates have been issued by Arch Linux (dovecot, kernel, linux-zen, munin, nautilus, perl-email-address, and tcpreplay), Debian (atftp), Fedora (perl-YAML and teeworlds), Mageia (java-1.8.0-openjdk, ldb, libsolv, and putty/filezilla/wxgtk), openSUSE...
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Tuesday May 7, 2019. 10:15 PM
One fixture of the memory-management track at the Linux Storage, Filesystem, and Memory-Management Summit is a discussion with subsystem maintainer Andrew Morton on how the development process is going. The 2019 version indicated that the memory-management developers are...
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