Post Syndicated from corbet original https://lwn.net/Articles/984839/
The kernel’s memory-management developers have been busy in recent times;
it can be hard to keep up with all that has been happening in this core
area. In an attempt to catch up, here is a look at recent work
affecting tiered-memory systems, underutilized huge pages, and duplicated
file data in the Enhanced Read-Only Filesystem (EROFS).
Post Syndicated from corbet original https://lwn.net/Articles/984770/
The LWN.net Weekly Edition for August 15, 2024 is available.
Post Syndicated from corbet original https://lwn.net/Articles/985482/
Version 6.4 of the Incus container manager is out.
This release builds upon the recently added OCI support from Incus
6.3, making it even easier to run application containers. It also
adds a number of useful new features for clustered and larger
environments with more control on the virtual CPU used when live
migrating VMs and finer grained resource constraints within
projects.
See this
announcement for details.
Post Syndicated from corbet original https://lwn.net/Articles/985481/
Security updates have been issued by Debian (kernel and roundcube), Fedora (microcode_ctl, pypy, python2.7, and python3.6), Oracle (389-ds-base, httpd, kernel, kernel-container, and linux-firmware), Red Hat (kernel-rt), SUSE (firefox, kubernetes1.23, libqt5-qtbase, openssl-1_1, python-gunicorn, python-Twisted, python-urllib3, and qt6-base), and Ubuntu (linux-aws-5.15, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-raspi, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-oem-6.8, linux-oracle-5.15, and qemu).
Post Syndicated from corbet original https://lwn.net/Articles/985296/
The Rust project has developed a
set of goals for the latter half of 2024.
Rust
for Linux. The experimental support for Rust
development in the Linux kernel is a watershed moment for Rust,
demonstrating to the world that Rust is indeed capable of targeting
all manner of low-level systems applications. And yet today that
support rests on a number of
unstable features, blocking the effort from ever going beyond
experimental status. For 2024H2 we will work to close the largest
gaps that block support.
Other goals include completing the 2024 Rust
Edition and improving the language’s async support.
Post Syndicated from corbet original https://lwn.net/Articles/985233/
Linus has released 6.11-rc3 right on
schedule. “Nothing particularly strange or interesting going on, things
“.
look normal
Post Syndicated from corbet original https://lwn.net/Articles/985198/
The
6.10.4,
6.6.45, and
6.1.104
stable kernel updates have been released; each contains another set of
important updates as usual.
Post Syndicated from corbet original https://lwn.net/Articles/985043/
The Canonical Kernel Team has announced
a new policy regarding the version of the kernel that will ship with each
Ubuntu release; the result will generally be the shipping of newer
releases.
To provide users with the absolute latest in features and hardware
support, Ubuntu will now ship the absolute latest available version
of the upstream Linux kernel at the specified Ubuntu release freeze
date, even if upstream is still in Release Candidate (RC) status.
The post goes on to acknowledge that “there are issues with this
“; there are a lot of policy details that will apply depending
approach
on just how raw the shipped kernel is.
Post Syndicated from corbet original https://lwn.net/Articles/984635/
Sometimes, the smallest changes create the longest discussions. As a case
in point, a proposal to make a one-line change in an informational text
file on systems running the Debian unstable distribution has blown up into
an interminable and sometimes unfriendly debate. At its core, though, this
discussion comes down to a seemingly simple question: should a program be
able to determine whether it is running on a Debian testing or unstable
system?
Post Syndicated from corbet original https://lwn.net/Articles/984838/
The Oligo Security blog discloses
a web-browser vulnerability that has been named “0.0.0.0 day”. In short,
browsers will allow JavaScript code to open connections to the all-zeroes
IPv4 address; the result is that any port that is open on the local host
can be accessed by a remote site. “When services use localhost, they
“
assume a constrained environment. This assumption, which can (as in the
case of this vulnerability) be faulty, results in insecure server
implementations.
Post Syndicated from corbet original https://lwn.net/Articles/984216/
The LWN.net Weekly Edition for August 8, 2024 is available.
Post Syndicated from corbet original https://lwn.net/Articles/984313/
The desire for the ability to checkpoint a process — to record its state in
a form that can be restarted at a future time — on Linux is almost as old as
Linux itself. See, for example, this announcement of a checkpoint
project that appeared in LWN in 1998. While working solutions exist, they
can be somewhat fragile and difficult to use; it is not surprising that
some people are interested in finding a better alternative. A current
effort goes by the name CRIB,
for Checkpoint/Restore in (naturally) BPF. It is far from clear that CRIB
will replace the existing solutions, but it is an interesting look at a
different way of solving the problem.
Post Syndicated from corbet original https://lwn.net/Articles/984617/
Version
129.0 of the Firefox browser has been released. Changes include some
improvements to the reader mode, tab previews, and use of HTTPS by default.
Post Syndicated from corbet original https://lwn.net/Articles/984598/
Security updates have been issued by Debian (libreoffice), Gentoo (containerd and firefox), Red Hat (httpd), SUSE (ca-certificates-mozilla, ksh, openssl-3-livepatches, podman, python-Twisted, and skopeo), and Ubuntu (imagemagick).
Post Syndicated from corbet original https://lwn.net/Articles/984539/
Version 2.43 of the GNU Binutils package is out. Changes include some
improvements to the assembler and the linker, better support for hardware
event counters in the Gprofng profiler, and more.
Post Syndicated from corbet original https://lwn.net/Articles/984501/
Linus has released 6.11-rc2 for testing.
“Hopefully we’ve gotten rid of the bulk of the silly noise here in rc2,
“
and not added too much new noise, so that we can get on with the process of
finding more meaningful issues.
Post Syndicated from corbet original https://lwn.net/Articles/983965/
Like many projects written in C, the kernel makes extensive use of the C
preprocessor; indeed, the kernel’s use is rather more extensive than most.
The preprocessor famously has a number of sharp edges associated with it.
One might not normally think of increased compilation time as one of them,
though. It turns out that some changes to a couple of conceptually simple
preprocessor macros — min() and max() — led to some truly
pathological, but hidden, behavior where those macros were used.
Post Syndicated from corbet original https://lwn.net/Articles/983267/
The LWN.net Weekly Edition for August 1, 2024 is available.
Post Syndicated from corbet original https://lwn.net/Articles/984143/
Arnd Bergmann has posted a
detailed timeline for the deprecation of support for old Arm CPUs in
both the kernel and the compiler toolchain. Anybody who is working with
that hardware will likely want to review this list and let the relevant
developers know if any of that support is still needed.
Post Syndicated from corbet original https://lwn.net/Articles/983935/
Security updates have been issued by Fedora (curl), Mageia (virtualbox), Oracle (squid), Red Hat (kernel), SUSE (apache2, bind, cdi-apiserver-container, cdi-cloner-container, cdi- controller-container, cdi-importer-container, cdi-operator-container, cdi- uploadproxy-container, cdi-uploadserver-container, devscripts, espeak-ng, freerdp, ghostscript, gnome-shell, gtk2, gtk3, java-11-openjdk, java-17-openjdk, kubevirt, libgit2, openssl-3, orc, p7zip, python-dnspython, and shadow), and Ubuntu (kernel, linux, linux-aws, linux-aws-hwe, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux, linux-aws, linux-gcp, linux-gke, linux-ibm, linux-nvidia, linux-oem-6.8, linux-raspi, linux, linux-azure, linux-azure-5.4, linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm, linux-raspi, linux-xilinx-zynqmp, linux-aws, linux-aws-5.4, linux-aws-5.15, linux-ibm, linux-ibm-5.15, linux-raspi, linux-gcp-5.15, and linux-lowlatency).