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

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在 2023/11/18 22:54, Marciniszyn, Mike 写道:
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

Got it. Thanks a lot. On ARM architecture, some kernel configurations can be

selected to enable multiple page sizes.


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.

On x86_64 architecture, how to enable a not-4k page size? For example, 16K, 64K and so on.

Thanks a lot.

Zhu Yanjun


Mike



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