LWN featured content
[$] A look at the PyPy 2.0 release
[Front] Posted May 15, 2013 15:31 UTC (Wed) by jake
It's hard to say why, but May appears to be the month where we look in on PyPy.
years ago, we had a May 2010 introduction to
followed by an experiment using it in May
2011. This year, the PyPy
2.0 release was made on May 9—that, coupled with our evident
tradition, makes for a good reason to look in on this Python
interpreter written in Python. Subscribers can click below for our report
on the release from this week's edition.
Full Story (comments: 9)
[$] PostgreSQL 9.3 beta: Federated databases and more
[Development] Posted May 14, 2013 20:04 UTC (Tue) by jake
In Berkeley, California — the birthplace of PostgreSQL — it's spring: plum
and cherry blossoms, courting finches and college students, new plans for
the summer, and the first beta release of the database
system. Every year, the first beta of the next PostgreSQL version comes out
in April or May, for a final release in September. PostgreSQL
9.3 beta 1 was released to the public on May 13th, and contains a
couple dozen new features both for database administrators and application
developers. Subscribers can click below for a look at some of the new
features by guest author Josh Berkus.
Full Story (comments: 30)
(Nearly) full tickless operation in 3.10
[Kernel] Posted May 8, 2013 15:47 UTC (Wed) by corbet
On a typical Linux system, each running CPU will be diverted between 100
and 1000 times each second by the periodic timer interrupt. That interrupt
is the CPU's cue to reconsider which process should be running, catch up
with read-copy-update (RCU) callbacks, and generally handle any necessary
housekeeping. This periodic "tick" can be reasonably compared to the
infamous big kernel lock (BKL): it is convenient to have around, but it
also has an effect on performance that makes developers wish to abolish it.
The key difference might be that getting rid of the timer tick has taken
rather longer than was required to eliminate the BKL. The 3.10 kernel will
take an important step in that direction, though, with the addition of the
"full NOHZ" mode — but a lot of limitations still apply.
Full Story (comments: 25)
LFCS: The LLVMLinux project
[Kernel] Posted May 7, 2013 16:14 UTC (Tue) by jake
Foundation Collaboration Summit (LFCS) seems to be a likely venue for an
update on the status of building the kernel with Clang/LLVM. Both in 2011 and 2012, we covered those updates. LFCS 2013
continued the trend as LLVMLinux
project lead Behan Webster presented the status and plans for the
project at LFCS. The gathering lived up to its name as well, since two
problems faced by the project were solved through collaboration at the summit.
Full Story (comments: 18)
Go and Rust — objects without class
[Development] Posted May 1, 2013 18:06 UTC (Wed) by jake
Since the advent of object-oriented programming languages around the
time of Smalltalk in the 1970s, inheritance has been a mainstay of the
object-oriented vision. It is therefore a little surprising that both
"Go" and "Rust" — two relatively new
languages which support
object-oriented programming — manage to avoid mentioning it.
In this subscriber-only article, Neil Brown looks at how this classic
object-oriented concept has evolved in two recent languages.
Full Story (comments: 27)
LFCS: The value of FOSS fiscal sponsorship
[Front] Posted Apr 30, 2013 19:21 UTC (Tue) by jake
As open source becomes more popular and mature, questions of
formalizing the governance and corporate structures of projects are
becoming of increasing importance, as can been seen by the rising
visibility of various
FOSS foundations. At the Linux Foundation Collaboration Summit in San
Francisco, Tony Sebro shared his insights about the value that fiscal
sponsors bring as umbrella organizations for FOSS projects. Sebro is the General Counsel of Software Freedom Conservancy, which is
of about 30 free and
open source projects, including Samba, Git, and BusyBox.
Click below (subscribers only) for the full report by Martin Michlmayr.
Full Story (comments: 8)
The 2013 Linux Storage, Filesystem, and Memory Management Summit
[Kernel] Posted Apr 23, 2013 21:45 UTC (Tue) by corbet
Linux Storage, Filesystem, and Memory Management Summit was held
April 18 and 19 in San Francisco, California, immediately after the Linux
Foundation's Collaboration Summit. The first set of notes from that
gathering is now available; at this point, we have most of the plenary
sessions and the entire memory management track written up. The rest of
our notes from the Summit will be added in the near future.
Full Story (comments: none)
LFCS: Preparing Linux for nonvolatile memory devices
[Kernel] Posted Apr 19, 2013 18:28 UTC (Fri) by corbet
Since the demise of core memory, there has been a fundamental dichotomy in
data storage technology: memory is either fast and ephemeral, or slow and
persistent. The situation is changing, though, and that leads to some
interesting challenges for the Linux kernel. How will we
adapt to the coming world where nonvolatile memory (NVM) devices are
commonplace? Ric Wheeler led a session at the 2013 Linux Foundation
Collaboration Summit to discuss this issue.
Full Story (comments: 24)
A taste of Rust
[Development] Posted Apr 17, 2013 22:35 UTC (Wed) by jake
the new programming language being
developed by the Mozilla project,
has a number of interesting features. One that stands out is the
focus on safety. There are clear attempts
to increase the range of errors that the compiler can detect and
prevent, and thereby reduce the number of errors that end up in
Click below (subscribers only) for an overview of the Rust language by LWN
contributor Neil Brown.
Full Story (comments: 81)
Current challenges in the free software ecosystem
[Front] Posted Apr 17, 2013 8:54 UTC (Wed) by mkerrisk
Given Eben Moglen's long association with the Free Software
Foundation, his work on drafting the GPLv3, and his role as President and
Executive Director of the Software Freedom Law Center, his
talk at the 2013 Free Software Legal and Licensing
Workshop promised to be thought-provoking. He chose to focus on two
topics that he saw as particularly relevant for the free software ecosystem
within the next five years: patents and the decline of copyleft licenses.
Full Story (comments: 56)
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QEMU 1.5.0 released
[Development] Posted May 21, 2013 16:17 UTC (Tue) by corbet
Version 1.5.0 of the QEMU hardware emulator is out. "This release
was developed in a little more than 90 days by over 130 unique authors
averaging 20 commits a day. This represents a year-to-year growth of over
38 percent making it the most active release in QEMU history." Some
of the new features include KVM-on-ARM support, a native GTK+ user
interface, and lots of hardware support and performance improvements. See
the change log for lots of
Full Story (comments: 4)
Tuesday's security updates
[Security] Posted May 21, 2013 15:45 UTC (Tue) by ris
Fedora has updated tomcat (F18; F17:
information disclosure) and krb5 (F18: UDP
ping-pong flaw in kpasswd).
openSUSE has updated tiff (12.2; 12.1: buffer
overflows) and clamav (12.2; 12.1: multiple vulnerabilities).
Red Hat has updated kernel-rt
(multiple vulnerabilities) and kernel (RHEL 6.2 EUS; RHEL 6.1 EUS: privilege
Slackware has updated kernel
Comments (none posted)
Ktap 0.1 released
[Kernel] Posted May 21, 2013 13:32 UTC (Tue) by corbet
A new kernel tracing tool called "ktap" has made its first release. "KTAP have
different design principles from Linux mainstream dynamic tracing language
in that it's based on bytecode, so it doesn't depend upon GCC, doesn't
require compiling a kernel module, safe to use in production environment,
fulfilling the embedded ecosystem's tracing needs." It's in an
early state; the project is looking for testers and contributors.
Comments (5 posted)
Kernel prepatch 3.10-rc2
[Kernel] Posted May 20, 2013 22:09 UTC (Mon) by corbet
The second 3.10 kernel prepatch is out for
testing. "For being an -rc2, it's not unreasonably sized, but I did
take a few pulls that I wouldn't have taken later in the rc series. So it's
not exactly small either. We've got arch updates (PPC, MIPS, PA-RISC),
we've got driver fixes (net, gpu, target, xen), and we've got filesystem
updates (btrfs, ext4 and cepth - rbd)."
Comments (none posted)
Security advisories for Monday
[Security] Posted May 20, 2013 16:32 UTC (Mon) by ris
Fedora has updated mediawiki (F18; F17:
multiple vulnerabilities) and libtiff (F17:
Mageia has updated kernel (multiple
vulnerabilities), kernel-linus (multiple
vulnerabilities), kernel-tmb (multiple
vulnerabilities), kernel-rt (multiple
vulnerabilities), and kernel-vserver
openSUSE has updated telepathy-idle
(certificate validation error) and gnutls
SUSE has updated acroread (multiple
vulnerabilities), and oracle-update (SM 1.7; SM 1.2: multiple vulnerabilities).
Comments (none posted)
Stable kernels 3.9.3, 3.4.46, and 3.0.79
[Kernel] Posted May 19, 2013 20:16 UTC (Sun) by jake
Greg Kroah-Hartman has announced the release of the 3.9.3, 3.4.46,
and 3.0.79 stable kernels. As always, they
contain important fixes throughout the tree, so users should upgrade.
Comments (none posted)
[Distributions] Posted May 19, 2013 19:49 UTC (Sun) by ris
The NetBSD Project has announced
NetBSD 6.1, the first feature update of the NetBSD 6 release
branch. "It represents a selected subset of fixes deemed important
for security or stability reasons, as well as new features and
enhancements." See the changelog
Comments (10 posted)
Mageia 3 released
[Distributions] Posted May 19, 2013 13:42 UTC (Sun) by corbet
The much-delayed Mageia
3 release is out. "We dedicate this release to the memory of
Eugeni Dodonov, our friend, our colleague and a great inspiration to those
he left behind. We miss his brilliance, his courtesy and his
dedication." Changes include an RPM upgrade, the 3.8 kernel,
availability of GRUB2 (but GRUB is still the default bootloader), and
more. See the
release notes for lots of details.
Comments (6 posted)
Perl 5.18.0 released
[Development] Posted May 19, 2013 13:37 UTC (Sun) by corbet
The Perl 5.18.0 release is out. "Perl v5.18.0 represents approximately 12 months of development since Perl
v5.16.0 and contains approximately 400,000 lines of changes across 2,100
files from 113 authors." See this perldelta
page for details on what has changed.
Full Story (comments: 1)
Sony opens up the Xperia Tablet Z
[Announcements] Posted May 17, 2013 20:06 UTC (Fri) by corbet
Sony has announced
the availability of an Android Open Source Project distribution for its
Xperia Tablet Z device. "For all you developers out there, of course
this means you can now access the software and contribute to this
project. And this is all before the tablet is even available in the US. A
special thanks to our Sony Mobile team for helping us create the package
early and a huge thanks to the Android developer community for all your
support. We can’t wait to see what you’ll do with the code." Source
is available on GitHub.
Comments (25 posted)
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