Re: [PATCH v3 0/2] Optimize dma_*_from_contiguous calls

dann frazier
2019-05-24T20:03:43Z

On Thu, May 23, 2019 at 10:08 PM Nicolin Chen <nicoleotsuka@gmail.com> wrote:
>
> [ Per discussion at v1, we decide to add two new functions and start
> replacing callers one by one. For this series, it only touches the
> dma-direct part. And instead of merging two PATCHes, I still keep
> them separate so that we may easily revert PATCH-2 if anything bad
> happens as last time -- PATCH-1 is supposed to be a safe cleanup. ]
>
> This series of patches try to optimize dma_*_from_contiguous calls:
> PATCH-1 abstracts two new functions and applies to dma-direct.c file.
> PATCH-2 saves single pages and reduce fragmentations from CMA area.
>
> Please check their commit messages for detail changelog.
>
> Nicolin Chen (2):
> dma-contiguous: Abstract dma_{alloc,free}_contiguous()
> dma-contiguous: Use fallback alloc_pages for single pages
>
> include/linux/dma-contiguous.h | 11 +++++++
> kernel/dma/contiguous.c | 57 ++++++++++++++++++++++++++++++++++
> kernel/dma/direct.c | 24 +++-----------
> 3 files changed, 72 insertions(+), 20 deletions(-)

Thanks Nicolin. Tested on a HiSilicon D06 system.

Tested-by: dann frazier <dann.frazier@canonical.com>