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Understanding Reduced-Voltage Operation in Modern DRAM Devices (2017) [pdf] (cmu.edu)
22 points by luu 4 months ago | hide | past | web | favorite | 2 comments

Great and informative paper, really liked reading it! Their findings on how data errors caused by lowering supply voltage even further, vary within different regions of the chips is super interesting.

You know there is a good read ahead when "References" alone takes 5 pages.

I dread to imagine the hacks with the new generations of controllers and DRAM deploying clever technologies like these.

Rowhammer could look like a kids toy.

I hope any new specs will require mandatory software tuned throttles for accessing any cells that are "electrically adjacent" in any way.

The way I see it, there should be little reason to allow fast repeated access to any small number of cells in a system. The caches are there to pick up such access anyway. AFAIK all the rowhammer type attacks use some method of bypassing the caches. Having some kind of performance degradation in the corner case of a program intentionally bypassing the caches should be preferable to having crazy security problems.

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