Re: [PATCH bpf-next v6 03/12] xsk: add support to allow unaligned chunk placement

[Jonathan Lemon]

On 26 Aug 2019, at 19:25, Kevin Laatz wrote:

> Currently, addresses are chunk size aligned. This means, we are very
> restricted in terms of where we can place chunk within the umem. For
> example, if we have a chunk size of 2k, then our chunks can only be placed
> at 0,2k,4k,6k,8k... and so on (ie. every 2k starting from 0).
>
> This patch introduces the ability to use unaligned chunks. With these
> changes, we are no longer bound to having to place chunks at a 2k (or
> whatever your chunk size is) interval. Since we are no longer dealing with
> aligned chunks, they can now cross page boundaries. Checks for page
> contiguity have been added in order to keep track of which pages are
> followed by a physically contiguous page.
>
> Signed-off-by: Kevin Laatz <kevin.la...@intel.com>
> Signed-off-by: Ciara Loftus <ciara.lof...@intel.com>
> Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
Acked-by: Jonathan Lemon <jonathan.le...@gmail.com>