RE: [PATCH for-rc 1/3] RDMA/core: Fix umem iterator when PAGE_SIZE is greater then HCA pgsz

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> > From: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
> >
> > 64k pages introduce the situation in this diagram when the HCA
> 
> Only ARM64 architecture supports 64K page size?

Arm supports multiple page_sizes.   The problematic combination is when
the HCA needs a SMALLER page size than the PAGE_SIZE.

The kernel configuration can select from 

> Is it possible that x86_64 also supports 64K page size?
> 

x86_64 supports larger page_sizes for TLB optimization, but the default minimum is always 4K.

Mike




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