Intel's 5-Level Paging Support Being Prepped For Linux 4.12

[phoronix]

Phoronix: Intel's 5-Level Paging Support Being Prepped For Linux 4.12

For months there have been Intel developers working on 5-level paging to increase Linux's virtual/physical address space limitations and with Linux 4.12 it looks like that will be supported...

http://www.phoronix.com/scan.php?page=news_item&px=Intel-5-LVL-Paging-Linux-4.12

[chuckula]

Five level paging allows raising the Linux x86_64 limitation of 256 TiB of virtual address space to 128 PiB and raises the physical address space limit from 64 TiB to 4 PiB.

640 PB oughta be enough for anybody right now.

[tildearrow]

Five level paging allows raising the Linux x86_64 limitation of 256 TiB of virtual address space to 128 PiB and raises the physical address space limit from 64 TiB to 4 PiB. While 64 TiB of memory may seem like a lot, some Intel customers are already hitting this limitation. The 5-level paging support

Michael, this part of the article is incomplete.

[chuckula]

Michael, this part of the article is incomplete.

I'm just stoked that I got my post in before the editor showed up.

[torsionbar28]

640 PB oughta be enough for anybody right now.

I dunno, if you're running a clunky bloated DE like GNOME 3, that might be cutting it close.

[Krejzi]

Sweet, we can finally run 2 instances of Eclipse and have 10 tabs open in Chrome/ium!

[Geopirate]

I hope this isn't their plan for Optane on Linux...

[cj.wijtmans]

I hope this isn't their plan for Optane on Linux...

Same i was really hoping to get a small m.2 xdd (xpoint disk drive?) for my OS for my next build.

[gilboa]

640 PB oughta be enough for anybody right now.

You might find it amusing but the 64TB physical memory limit a major issue for big iron main frames.
E.g. The soon (?) to be released Xeon E5/7 v5 are rumored to double the memory limit per sock, meaning a 4S machine will be limited to 24TB RAM, and a 8S machine will be limited to 48TB RAM, far too close to the 64TB RAM.
Plus, super-computer-in-box, such as the SGI UV 300 already hitting the 64TB limit, making it essential for Linux to support 5-level paging.

- Gilboa

[Geopirate]

Same i was really hoping to get a small m.2 xdd (xpoint disk drive?) for my OS for my next build.

My hope was the same as well. I keep media on my NAS so one of these small Optane drives with a cheap SATA SSD for anything extra would be amazing.