24 Aug
2018
24 Aug
'18
3:35 a.m.
On Fri, Aug 24, 2018 at 04:22:57AM +0200, Andre Tomt wrote:
On 23. aug. 2018 17:44, Andi Kleen wrote:
On Thu, Aug 23, 2018 at 03:44:18PM +0200, Vlastimil Babka wrote:
Two users have reported [1] that they have an "extremely unlikely" system with more than MAX_PA/2 memory and L1TF mitigation is not effective. In fact it's a CPU with 36bits phys limit (64GB) and 32GB memory, but due to holes in the e820 map, the main region is almost 500MB over the 32GB limit:
Ah I see it's a client part with very large DIMMs and someone being very brave and using that much memory without ECC.
FYI; It is also happening on Xeon E3v2 (Ivy Bridge generation) w/ 32GB of ECC RAM here, a low-end server part that officially supports up to 32GB.
Good point.
-andi