HWPOISON

Posted Sep 1, 2009 20:26 UTC (Tue) by jzbiciak (guest, #5246)
In reply to: HWPOISON by dlang
Parent article: HWPOISON

I guess what you're missing is who marks the memory as poisoned. The CPU sends a machine check to the OS. The OS marks the memory as poisoned, or otherwise discards the contents of the page if it was clean. The HWPOISON patch provides the OS handler and hooks to poison the page (or do whatever needs doing) when the machine check arrives.

HWPOISON

Posted Sep 1, 2009 21:31 UTC (Tue) by dlang (guest, #313) [Link] (1 responses)

Ok, I was reading this as something new being implemented at the hardware layer by Intel

HWPOISON

Posted Sep 1, 2009 23:47 UTC (Tue) by jzbiciak (guest, #5246) [Link]

It's both. The hardware now supports a concept of recoverable machine check, and the software uses it.