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.

Thanks a lot. Perhaps RXE also needs this feature "the HCA needs a SMALLER page size than the PAGE_SIZE". But I do not have such test environment at hand. If we can setup a test environment on x86_64 architecture, it is very convenient for me to make tests and development.

Reviewed-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>

Zhu Yanjun


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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