Re: add an API to check if a streamming mapping needs sync calls

[BjÃrn TÃpel]

On 2020-06-29 15:03, Christoph Hellwig wrote:
> Hi all,
>
> this series lifts the somewhat hacky checks in the XSK code if a DMA
> streaming mapping needs dma_sync_single_for_{device,cpu} calls to the
> DMA API.

Thanks a lot for working on, and fixing this, Christoph!

I took the series for a spin, and there are (obviously) no performance
regressions.

Would the patches go through the net/bpf trees or somewhere else?

For the series:
Tested-by: BjÃrn TÃpel <bjorn.topel@xxxxxxxxx>
Acked-by: BjÃrn TÃpel <bjorn.topel@xxxxxxxxx>


BjÃrn

> Diffstat:
>   Documentation/core-api/dma-api.rst |    8 +++++
>   include/linux/dma-direct.h         |    1
>   include/linux/dma-mapping.h        |    5 +++
>   include/net/xsk_buff_pool.h        |    6 ++--
>   kernel/dma/direct.c                |    6 ++++
>   kernel/dma/mapping.c               |   10 ++++++
>   net/xdp/xsk_buff_pool.c            |   54 ++-----------------------------------
>   7 files changed, 37 insertions(+), 53 deletions(-)