Rowhammer bit flips with DDR4 memory reported

[Mark Seaborn]

I came across the following forum post which reports that a system with DDR4 memory has been failing Memtest86's rowhammer test:

http://www.passmark.com/forum/showthread.php?5301-Rowhammer-mitigation&p=19553

"My i7-5820K/GA-X99-UD4/2400MHz Crucial Ballistix DDR4 system was failing rowhammer (a few hundred errors per pass) until I reduced the refresh interval timing from the default of 7.8ms, in spite of the fact that DDR4 is supposed to include rowhammer mitigation (source: https://en.wikipedia.org/wiki/Row_hammer#Mitigation)"

I came across that because it was cited by this article about rowhammer.js:

http://www.slate.com/articles/technology/bitwise/2015/07/rowhammer_security_exploit_why_a_new_security_attack_is_truly_terrifying.single.html

Cheers,

Mark