News for hackers. Stuff that matters.

A comment on The mysterious case of the Linux Page Table Isolation patches. Parent comment

Re:The mysterious case of the Linux Page Table Isolation pat... by kps on Monday January 01, 2018 @01:26PM (#16047242)
Or indeed any bits of ECC. The fact that Intel omits or disables it on most CPUs is shameful.
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by brokensegue on Monday January 01, 2018 @02:02PM (#16047438)
one bit of ECC isn't sufficient...
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by kps on Tuesday January 02, 2018 @11:40AM (#16053002)
Best kind of correct… but modern wide memory controllers turned (9,8), which only detects one error, into (72,64), which is SECDED, “for free”.
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by brokensegue on Tuesday January 02, 2018 @01:39PM (#16054129)
that is still not sufficient
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by dboreham on Monday January 01, 2018 @01:31PM (#16047269)
There's ECC inside the chips.
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by Symmetry on Monday January 01, 2018 @02:50PM (#16047679)
The internal caches have ECC but rowhammer targets the DIMMs. ECC DIMMs would solve the issue but Intel, for market segmentation reasons, fuses off the ability to handle ECC memory in consumer chips.
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by baq on Tuesday January 02, 2018 @02:51AM (#16050531)
ECC doesn't protect against rowhammer though. It makes it more difficult but not impossible.
[ Parent | on HN ]
Re:The mysterious case of the Linux Page Table Isolation pat... by Dylan16807 on Tuesday January 02, 2018 @06:07AM (#16051191)
If you shut down whatever is triggering errors instead of completely ignoring them, the difficulty level is pretty close to "impossible".
[ Parent | on HN ]