x86 Defects Inside Linux, Intel 'Bribes' Torvalds With New (and Made Up) "Innovation Award"
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Removing an obsolete AMD fix makes Linux kernel 6 quicker
An ancient fix for power management issues on AMD systems has been reducing Linux's performance since 2002. Now it's gone.
One of the joys of modern silicon chips is that power management is vitally important. It hasn't been about saving power or extending battery life since the 20th century. Processor vendors survive by selling us more and more transistors, solely on the basis that most of them are turned off most of the time â otherwise the chips would rapidly incinerate themselves, no matter how good their cooling.
This requires sophisticated interfaces between the OS and the hardware, and way back in 1996, a new standard called ACPI (Advanced Configuration and Power Interface) replaced the positively stone age APM (Advanced Power Management) from the Windows 3 era.
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Gentoo-Sources: Experimental - ACPI: processor idle: Practically limit 'Dummy wait' workaround to old Intel systems – Mike Paganoâs Weblog
I added the patch indicated above to gentoo-sources behind the âexperimentalâ flag, for now. This is to remove a 20 year old workaround for newer AMD processors. I expect this to propagate to lower kernels via upstream directly. This will be in gentoo-sources-5.19.12 (USE=experimental)
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Pat Gelsinger Bestows Linux Creator Linus Torvalds With Intel's First Innovation Award | HotHardware [Ed: Bribing Linus after he recommended AMD and ARM]
Linus and Intel have not always seen eye-to-eye. In the past, Linus has rallied against Chipzilla for stifling error correcting memory support on desktop platforms and has accused the company of providing lackluster solutions to the Spectre and Meltdown CPU flaws. Nevertheless, Linus understands the importance of the x86 architecture and Intel clearly respects the tireless contributions Linus has made.