DMA-buf and uncached system memory

[Pekka Paalanen]

On Thu, 23 Jun 2022 08:59:41 +0200
Christian König <christian.koenig at amd.com> wrote:

> The exporter isn't doing anything wrong here. DMA-buf are supposed to be 
> CPU cached and can also be cache hot.

Hi,

what is that statement based on?

Were the (mandatory for CPU access) cpu_access_begin/end functions &
ioctls not supposed to ensure that CPU cache is up-to-date / CPU cache
is fully flushed out?


Thanks,
pq
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