------- Comment From aneesh.ku...@in.ibm.com 2017-10-26 01:24 EDT------- We do support 16GB hugepage from hardware point of view. What we had missing was the ability to allocate such large contiguous memory in the kernel. The pseries platform solved this by taking help from hypervisor. PAPR introduced a mechanism for hypervisor to mark 16G contiguous region reserved and pass the details via device tree. On Powernv this is not available and hence we are not able to make use of 16G hugepages.
I have added the ability to allocate 16G hugepages on powernv platform. The relevant fixes can be found at commit 4ae279c2c96ab38a78b954d218790a8f6db714e5 Author: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com> Date: Fri Jul 28 10:31:27 2017 +0530 powerpc/mm/hugetlb: Allow runtime allocation of 16G. You may want that and other dependent kernel patches. -aneesh -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1706247 Title: It should not be possible to turn on 16g huge pages on Ubuntu 16.04.2 PowerNV To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1706247/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
