[PATCH v3 13/13] dma: arm64: Add CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC and enable it for arm64

[Alexander Graf]

Hi Isaac,

On 30.11.22 19:48, Isaac Manjarres wrote:
> On Tue, Nov 08, 2022 at 11:03:31AM +0100, Christoph Hellwig wrote:
>> On Tue, Nov 08, 2022 at 09:52:15AM +0000, Catalin Marinas wrote:
>>> Since it's hard to guess the optimal swiotlb buffer for such platforms,
>>> I think a follow-up step would be to use the DMA coherent pool for
>>> bouncing if no swiotlb buffer is available. At least the pool can grow
>>> dynamically. Yet another option would be to increase the swiotlb buffer
>>> at run-time but it has an overhead for is_swiotlb_buffer().
>> Alex said he wanted to look into growing the swiotlb buffer on demand
>> for other reason, so adding him to Cc to check if there has been any
>> progress on that.
> Hi Alex,
>
> Did you get a chance to look into this? If so, have you been able to
> make progress on being able to grow the SWIOTLB buffer on demand?


I've been slightly under water and haven't been able to look at this yet 
:). It's on my list, but will probably be a while until I get to it. 
Would you be interested in having a first try?


Thanks,

Alex