[RFC PATCH v2] uacce: Add uacce_ctrl misc device

Jason Gunthorpe jgg at ziepe.ca
Tue Jan 26 10:16:19 AEDT 2021

On Mon, Jan 25, 2021 at 10:21:14PM +0000, Song Bao Hua (Barry Song) wrote:
> mlock, while certainly be able to prevent swapping out, it won't
> be able to stop page moving due to:
> * memory compaction in alloc_pages()
> * making huge pages
> * numa balance
> * memory compaction in CMA

Enabling those things is a major reason to have SVA device in the
first place, providing a SW API to turn it all off seems like the
wrong direction.

If the device doesn't want to use SVA then don't use it, use normal
DMA pinning like everything else.


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