Kernel: CPU Defects, WireGuard in Linux, Secure Virtual Machine (SVM), Performance and Scalability Systems Microconference
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A Global Switch To Kill Linux's CPU Spectre/Meltdown Workarounds?
Something I have seen asked in our forums and elsewhere -- most recently on the kernel mailing list -- is whether there is a single kernel option that can be used for disabling all of the Spectre/Meltdown workarounds and any other performance-hurting CPU vulnerability workarounds.
With many of the mitigation patches for these speculative execution vulnerabilities hitting many processors these days, there's often a measurable "performance tax" associated with them. Fortunately, for most of the mitigations they can be disabled at run-time via various options.
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WireGuard Takes Another Step Towards The Mainline Linux Kernel
Jason Donenfeld who has now spent years working on WireGuard as an in-kernel, secure network tunnel sent out a second version of his kernel patches on Friday.
At the end of July he sent out the initial kernel patches for review and following that month worth of feedback he now has V2. The revised work includes splitting up some of the Zinc crypto code, code clean-ups, and other low-level improvements to this code.
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IBM Posts Initial Patches For Linux Secure Virtual Machine On POWER
IBM developers on Friday posted their initial Linux kernel patches for enabling Secure Virtual Machine (SVM) support with POWER hardware.
These "request for comments" patches are their preliminary work on supporting Secure Virtual Machines on POWER.. The goal is on making the guest's memory inaccessible to the hypervisor, similar to the work done by AMD for EPYC CPUs with Secure Encrypted Virtualization and as well some work by Intel for their CPUs.
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Performance and Scalability Systems Microconference Accepted into 2018 Linux Plumbers Conference
Core counts keep rising, and that means that the Linux kernel continues to encounter interesting performance and scalability issues. Which is not a bad thing, since it has been fifteen years since the “free lunch” of exponential CPU-clock frequency increases came to an abrupt end. During that time, the number of hardware threads per socket has risen sharply, approaching 100 for some high-end implementations. In addition, there is much more to scaling than simply larger numbers of CPUs.
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Quickly & Easily Running Benchmarks On Docker With "phoronix/pts"
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