On May 26, 2017 12:23:18 PM PDT, Dave Hansen <dave.hansen@xxxxxxxxx> wrote: >On 05/26/2017 11:24 AM, hpa@xxxxxxxxx wrote: >> The only case where that even has any utility is for an application >> to want more than 128 TiB address space on a machine with no more >> than 64 TiB of RAM. It is kind of a narrow use case, I think. > >Doesn't more address space increase the effectiveness of ASLR? I >thought KASLR, especially, was limited in its effectiveness because of >a >lack of address space. The shortage of address space for KASLR is not addressable by LA57; rather, it would have to be addressed by compiling the kernel using a different (less efficient) memory model, presumably the "medium" memory model. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
