Open-source News

Scheduler Woes: Bisecting Early Performance Regressions Found In Linux 6.19

Phoronix - Wed, 12/10/2025 - 00:00
Yesterday I noted some early performance regressions I've found on the Linux 6.19 kernel compared to Linux 6.18 LTS stable. Those initial benchmarks were on an AMD EPYC server. Since then I've seen many of the same workloads regressing similarly on an AMD Ryzen Threadripper workstation between Linux 6.18 and Linux 6.19 Git. Given the significant impact and AMD Threadripper processors always helping out to speed-up Linux kernel build times to make for a quicker and more manageable kernel bisecting experience, here is a look at some of the results for the Linux 6.19 performance regressions.

AMD EPYC Embedded 2005 Series Announced For BGA Zen 5 CPUs

Phoronix - Tue, 12/09/2025 - 23:00
AMD today announced their newest member of their expansive EPYC family: the EPYC Embedded 2005 series. The new AMD EPYC Embedded 2005 Series are intended primarily for networking, storage, and industrial devices while these BGA processors will likely see other interesting thin-server uses as well.

Microsoft Has Many Hyper-V Virtualization Improvements For Linux 6.19

Phoronix - Tue, 12/09/2025 - 22:30
For benefiting their Azure cloud and other users of Hyper-V virtualization at large, Microsoft has rolled out a number of feature additions and improvements for their Hyper-V kernel code in Linux 6.19...

Bug-Catching "Smatch" Static Analysis On The Linux Kernel Under Threat Due To Funding Gap

Phoronix - Tue, 12/09/2025 - 19:17
For the past 15 years the Smatch static analysis tool has been routinely run for uncovering countless bugs within the Linux kernel. Dan Carpenter who authored Smatch and has been routinely analyzing the Linux kernel with it has authored more than 5,568 patches over the years to become one of the top bug fixers for the kernel. But his funding at Linaro has been cut and the project's future now in question...

Linux 6.19 Enables Per-CPU BIO Caching By Default For Helping Performance

Phoronix - Tue, 12/09/2025 - 18:59
Last week saw the main set of block and IO_uring feature patches for the Linux 6.19 merge window but some additional block subsystem material was merged on Monday. There are various NVMe updates now merged plus enabling per-CPU BIO caching by default to help with file-system performance...

F2FS Brings More Performance Optimizations To Linux 6.19

Phoronix - Tue, 12/09/2025 - 18:42
The Flash-Friendly File-System "F2FS" is enjoying more performance optimizations and other improvements for the Linux 6.19 kernel cycle...

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