LLVM Lands Performance-Hitting Mitigation For Intel LVI Vulnerability

Made public in March was the Load Value Injection (LVI) attack affecting Intel CPUs with SGX capabilities. LVI combines Spectre-style code gadgets with Meltdown-type illegal data flows to bypass existing defenses and allow injecting data into a victim's transient execution. While mitigations on the GNU side quickly landed, the LLVM compiler mitigations were just merged today.

5 Hours Ago - Software - 13 Comments
Ubuntu 20.04 LTS Beta Released

For those with extra time on their hands due to being at home and social distancing, Canonical released the Ubuntu 20.04 LTS beta today for testing.

5 Hours Ago - Ubuntu - Ubuntu 20.04 Beta - 17 Comments

2 April

System76 Thelio Major Proves To Be A Major Player For Linux Workstations

For the past two months we have been testing the System76 Thelio Major and it's been working out extremely well with performance and reliability. The Thelio Major offering with options for Intel Core X-Series or AMD Ryzen Threadripper and resides between their standard Thelio desktop with Ryzen/Core CPUs and the Thelio Massive that sports dual Intel Xeon CPUs.

2 April 01:20 PM EDT - Computers - 5 Comments
LLVM Plumbs Support For Intel Golden Cove's New SERIALIZE Instruction

Yesterday we noted Intel's programming reference manual being updated with new Golden Cove instructions for Sapphire Rapids and Alder Lake and with that Intel's open-source developers have begun pushing their changes to the compilers. The latest updates add TSXLDTRK, a new HYBRID bit for Core+Atom hybrid CPUs, and a new SERIALIZE instruction. After GCC was receiving the patch attention yesterday, LLVM is getting its attention today.

2 April 07:07 AM EDT - LLVM - Intel SERIALIZE - 1 Comment
SELinux Seeing Performance Improvements With Linux 5.7

A few months back when we last looked at the performance impact of having SELinux enabled there was a hit but not too bad for most workloads. But we'll need to take another look soon as with the Linux 5.7 kernel are some performance improvements and more for SELinux.

2 April 01:29 AM EDT - Linux Security - Linux 5.7 SELinux - 5 Comments

1 April

31 March

30 March

Ubuntu 20.04 GNOME X.Org vs. Wayland Session Performance Impact For Gaming

In the past using the Wayland-based GNOME Shell session and other Wayland compositors has generally resulted in a performance hit in going through (X)Wayland but that is much less so these days. Here are some initial benchmarks of Ubuntu 20.04 running various Steam Linux gaming benchmarks both under the default X.Org-based session and then again when using the Wayland session and its (X)Wayland support.

30 March 03:05 PM EDT - Linux Gaming - 164 Comments
GNU Linux-libre 5.6-gnu Released After Deblobbing AMD Trusted Execution, Ath11k WiFi

Following last night's release of Linux 5.6, the GNU FSFLA folks have put out the Linux-libre 5.6-gnu kernel as their fully-free-software kernel that disallows loading binary kernel modules, disables functionality requiring closed-source firmware/microcode, and other aspects to ensure only free software code is running on the system.

30 March 05:41 AM EDT - GNU - GNU Linux-libre 5.6-gnu - 22 Comments
Mesa Developers Discussing Again Whether To Fork Or Drop Non-Gallium3D Drivers

Back in December was a developer discussion over dropping or forking non-Gallium3D drivers. Since then the Intel "Iris" Gallium3D driver has successfully become the default OpenGL driver for Broadwell/Gen8 and newer while the non-Gallium3D drivers continue to just face bit rot. The discussion over dropping/forking non-Gallium3D Mesa drivers has been reignited.

30 March 03:53 AM EDT - Mesa - Killing The Old Drivers - 52 Comments

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