Open-source News

AMD Zen 5 Not Affected By Inception/SRSO, mitigations=off Yields No Benefit On Ryzen 9000 Series

Phoronix - Fri, 09/06/2024 - 23:27
One of the security changes with AMD Zen 5 processors that I haven't seen AMD publicly mention at least not prominently is that the new cores are not vulnerable to Speculative Return Stack Overflow (SRSO). Unlike Zen 4 and prior, under Linux I noticed that Zen 5 is no longer affected by the SRSO "INCEPTION" vulnerability. But of course there does remain other CPU security mitigations in place carried over from Zen 4. For those wondering about the mitigation costs or if it's worthwhile running Zen 5 with the "mitigations=off" insane mode, here are some benchmarks.

Updated Patches Allow Compiling The Linux Kernel From Within macOS

Phoronix - Fri, 09/06/2024 - 22:41
Back in 2022 were a set of patches that allowed compiling the ARM64 Linux kernel from Apple macOS hosts. The intent was for developers just wanting to do some build/smoke testing from under an Apple Silicon device running macOS to see at least any kernel changes are successfully compiling on macOS with its LLVM/Clang-based toolchain. An updated form of those patches were posted today for review...

Pre-Ordered The ASUS Zenbook S 14 For Intel Core Ultra "Lunar Lake" Linux Testing

Phoronix - Fri, 09/06/2024 - 22:12
With this week's announcement of the Intel Core Ultra 200V Series "Lunar Lake" processors, I've been very eager to try out the Meteor Lake successor for Linux testing. As sadly is usually the case, for delivering Linux support details and performance benchmarks around launch-time I'm typically left buying a laptop retail for Linux testing. In this case after seeing the Lunar Lake laptops announced this week and their availability, I ended up settling on the ASUS Zenbook S 14 (UX5406SA-S14.U71TB) for the initial Core Ultra 200V series Linux review...

Linux Very Close To Enabling Real-Time "PREEMPT_RT" Support

Phoronix - Fri, 09/06/2024 - 20:36
We're very close to the finish line for the mainline Linux kernel being able to enable real-time "PREEMPT_RT" kernel support...

Linux 6.11-rc7 To Fix A "Massive Performance Regression" For AMD Graphics

Phoronix - Fri, 09/06/2024 - 18:58
Sent out today were the DRM fixes for 6.11-rc7 ahead of the Linux 6.11-rc7 kernel being released on Sunday. As usual most of the changes revolve around the AMDGPU and Intel i915/Xe drivers plus random fixes to the smaller drivers. There is one change though with the AMD Radeon graphics driver side worth highlighting to address a performance regression affecting recent kernels...

It's Taken Until 2024 To Add FreeBSD To X.Org Continuous Integration Testing

Phoronix - Fri, 09/06/2024 - 18:48
It's taken until now to add FreeBSD to the X.Org Continuous Integration (CI) automated testing so that all proposed changes to the X.Org Server can now be build-tested on FreeBSD rather than just Linux...

FEX 2409 Highlights Some Of The Challenges Of Emulating x86 On RISC-V

Phoronix - Fri, 09/06/2024 - 18:40
FEX 2409 has been released for this open-source project that's known for allowing x86_64 Linux binaries -- including both games and applications -- to run rather well on AArch64. It's also been working on enabling x86_64 programs on RISC-V but there due to architectural differences it's more of a challenge than with ARM...

Oracle Rewrites Libresource For Standardized API Of Linux System Resource Information

Phoronix - Fri, 09/06/2024 - 18:17
Back in 2018 Oracle introduced Libresource as a standardized API for accessing system resource information around memory / network / device statistics and other metrics. Libresource v2 was announced this week as largely a rewrite of the project...

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