An unexpected perf feature

Posted May 24, 2013 7:35 UTC (Fri) by ballombe (subscriber, #9523)
In reply to: An unexpected perf feature by dlang
Parent article: An unexpected perf feature

From a security point of view amd64 _is_ bad, especially compared to older architecture like sparc which provide fully separated kernel and user address space.

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An unexpected perf feature

Posted May 24, 2013 7:48 UTC (Fri) by dlang (guest, #313) [Link] (1 responses)

if they were so fully separated, how could you pass data between them?

Even if true, it just shows that price and performance trump low probability security benefits once again, so what's new?

An unexpected perf feature

Posted May 24, 2013 12:43 UTC (Fri) by helge.bahmann (subscriber, #56804) [Link]

Sparc has instructions "load from foreign address space" and "store to foreign address space" (and even "compare and swap in foreign address space").