Re: [PATCH 3/5] drm/amdkfd: use vma_is_stack() and vma_is_heap()

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Allocations in the heap and stack tend to be small, with several allocations sharing the same page. Sharing the same page for different allocations with different access patterns leads to thrashing when we migrate data back and forth on GPU and CPU access. To avoid this we disable HMM migrations for head and stack VMAs.

Regards,
  Felix


Am 2023-07-12 um 10:42 schrieb Christoph Hellwig:
On Wed, Jul 12, 2023 at 10:38:29PM +0800, Kefeng Wang wrote:
Use the helpers to simplify code.
Nothing against your addition of a helper, but a GPU driver really
should have no business even looking at this information..





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