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[$] Buffered atomic writes, writethrough, and more
In back-to-back sessions at the start of the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit (which spilled over into a third slot), the atomic-buffered-writes fe [...]
https://lwn.net/Articles/1072019/ #LWN #Linux #kernel #PostgreSQL #BPF #io_uring
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Three stable kernels for Thursday
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[$] Keeping COWs in context (a.k.a. anonymous reverse mapping)
The kernel's reverse-mapping machinery is charged with locating the page-table entries that refer to a given page in memory. The reverse mapping of anonymous pages is handled diff [...]
https://lwn.net/Articles/1072378/ #LWN #Linux #kernel #Git #BPF
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Security updates for Thursday
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[$] LWN.net Weekly Edition for May 14, 2026
The LWN.net Weekly Edition for May 14, 2026 is available.
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[$] Friction in Fedora over AI developer desktop initiative
A push by Red Hat employees to create a Fedora "AI Developer Desktop" with support for out-of-tree kernel drivers and AI toolkits has been met with objections from some long-time m [...]
https://lwn.net/Articles/1071949/ #LWN #Linux #RedHat #Bazzite #Git
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[$] Managing pages outside of the direct map
When Brendan Jackman proposed a session for the 2026 Linux Storage, Filesystem, Memory Management, and BPF Summit, his topic was "a pagetable library for the kernel". During the a [...]
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Security updates for Wednesday
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Sovereign Tech Fund invests in KDE
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[$] Using dma-bufs for read and write operations
The kernel's dma-buf subsystem provides a way for drivers to share memory buffers, usually in order to support efficient device-to-device I/O. At the 2026 Linux Storage, Filesyste [...]
https://lwn.net/Articles/1072317/ #LWN #Linux #kernel #Git #BPF #io_uring
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[$] Scaling transparent huge pages to 1GB
As a general rule, when developers talk about huge pages, they are referring to PMD-level pages that are 1MB or 2MB in size, depending on the CPU architecture. Most CPUs can suppo [...]
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Security updates for Tuesday
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Stenberg: Mythos finds a curl vulnerability
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[$] Providing 64KB base pages with 4KB kernels, two different ways
Some CPU architectures are able to run with a number of different base-page sizes; using a larger size can often result in better performance at the cost of increased memory use. [...]
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Debian to require reproducible builds
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Security updates for Monday
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Kernel prepatch 7.1-rc3
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More stable kernels with partial Dirty Frag fixes
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[$] Forgejo "carrot disclosure" raises security questions
An unusual, some might say hostile, approach to disclosing an alleged remote-code-execution (RCE) flaw in the Forgejo software-collaboration platform has sparked a multifaceted con [...]
https://lwn.net/Articles/1071499/ #LWN #Linux #security #Python
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killswitch for short-term emergency vulnerability mitigation
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[$] A 2026 DAMON update
The kernel's DAMON subsystem provides user-space monitoring and management of system memory. DAMON is developing rapidly, so an update on its progress has become a regular feature [...]
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Security updates for Friday
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Four stable kernels with partial fixes for Dirty Frag
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Dirty Frag: a zero-day universal Linux LPE
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[$] A new era for memory-management maintainership
On April 21, Andrew Morton let it be known that he intends to begin stepping away from the maintainership of kernel's memory-management subsystem — a responsibility he has carried [...]
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An update on KDE's Union style engine
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Security updates for Thursday
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Three stable kernel updates
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[$] LLM-driven security reports disrupt coordinated disclosure
Predictions that LLM tools would cause a surge in reports of security vulnerabilities have, unquestionably, borne out. As expected, maintainers are having to wade through more secu [...]
https://lwn.net/Articles/1070698/ #LWN #Linux #security #Debian #SUSE #RedHat #Gentoo #Python #Git
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[$] Hardware-assisted Arm VMs for s390
A recent patch set from Steffen Eiden and others has set the groundwork for allowing hardware-assisted emulation of Arm CPUs on s390 CPUs. Version two of the posting fixes a hand [...]
https://lwn.net/Articles/1069954/ #LWN #Linux #kernel #ArchLinux #BPF
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[$] Restartable sequences, TCMalloc, and Hyrum's Law
Hyrum's Law states that any observable behavior of a system will eventually be depended upon by somebody. The kernel community is currently contending with a clear demonstration o [...]
https://lwn.net/Articles/1070072/ #LWN #Linux #kernel #glibc #BPF
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[$] One Sized trait does not fit all
In Rust, types either possess a constant size known at compile time, or a dynamically calculated size known at run time. That is fine for most purposes, but recent proposals for th [...]
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[$] The first half of the 7.1 merge window
The 7.1 merge window opened on April 12 with the release of the 7.0 kernel. Since then, 3,855 non-merge changesets have been pulled into the mainline repository for the next relea [...]
https://lwn.net/Articles/1067250/ #LWN #Linux #kernel #Debian #ArchLinux #Rust #Git #BPF #io_uring
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[$] Development statistics for the 7.0 kernel
Linus Torvalds released the 7.0 kernel as expected on April 12, ending a relatively busy development cycle. The 7.0 release brings a large number of interesting changes; see the L [...]
https://lwn.net/Articles/1066723/ #LWN #Linux #kernel #SUSE #RedHat #XFS
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[$] Removing read-only transparent huge pages for the page cache
Things do not always go the way kernel developers think they will. When the kernel gained support for the creation of read-only transparent huge pages for the page cache in 2019, [...]
https://lwn.net/Articles/1066582/ #LWN #Linux #kernel #Git #XFS #BPF
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[$] An API for handling arithmetic overflow
On March 31, Kees Cook shared a patch set that represents the culmination of more than a year of work toward eliminating the possibility of silent, unintentional integer overflow [...]
https://lwn.net/Articles/1065889/ #LWN #Linux #kernel #GCC #LLVM #Clang #Rust
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[$] Protecting against TPM interposer attacks
The Trusted Platform Module (TPM) is a widely misunderstood piece of hardware (or firmware) that lives in most x86-based computers. At SCALE 23x in Pasadena, California, James Bot [...]
https://lwn.net/Articles/1064685/ #LWN #Linux #kernel #Python #Git #systemd #OpenSSH
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[$] IPC medley: message-queue peeking, io_uring, and bus1
The kernel provides a number of ways for processes to communicate with each other, but they never quite seem to fit the bill for many users. There are currently a few proposals fo [...]
https://lwn.net/Articles/1065490/ #LWN #Linux #kernel #Rust #Git #io_uring
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[$] More efficient removal of pages from the direct map
The kernel's direct map provides code running in kernel mode with direct access to all physical memory installed in the system — on 64-bit systems, at least. It obviously makes li [...]
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[$] Tracking when BPF programs may sleep
BPF programs can run in both sleepable and non-sleepable (atomic) contexts. Currently, sleepable BPF programs are not allowed to enter an atomic context. Puranjay Mohan has a new [...]
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Samba 4.24.0 released
https://lwn.net/Articles/1063517/ #LWN #Linux #SUSE #ArchLinux #XFS