Migration/remap question for hugee pages of 2MB

[Mounesh Badiger <mounesh.b@xxxxxxxxx>]

Hi,

Can linux-mm group confirm, if huge pages of size 2MB cannot be migrated or remapped when user-space uses them for IO with the bypassing kernel?  We need to VA->PA intact once it is mapped. 

We want to reserve huge pages and map them using hugetlbfs into the userspace.  Use /proc/<pid>/pagemap  to get VA->PA mapping and use PA for IO.

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Mounesh Badiger

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