On Tue, 2017-02-07 at 09:47 +0530, Aneesh Kumar K.V wrote: > > Benjamin Herrenschmidt <b...@kernel.crashing.org> writes: > > > That's 48 bits. I would keep the limit at 47 without some explicit > > opt-in by applications. That's what users get on x86 and we know > > some GPUs have limits there. > > The idea is to have linux personality values that will limit the > effective address to different memory range. By default max effective > address will be limited to 64TB. Applications can then extend this to > 128TB or 512TB. So we will have two personality values PER_LINUX_128TB > and PER_LINUX_512TB ?
No. I think we can go up to 47-bits without any personality requirement. For above, a single personality indicating that the application has no limit. Check what Intel is doing for 5-level trees Cheers, Ben.
