[PATCH] net/gve: Allocate qpl pages using malloc if memzone allocation fails

[Praveen Kaligineedi]

The TX queue requires IOVA contiguous QPL memory.  So, we still need
memzone code for TX queues.

Regards,
Praveen

On Wed, Dec 18, 2024 at 7:51 PM Stephen Hemminger
<stephen at networkplumber.org> wrote:
>
> On Wed, 18 Dec 2024 15:46:35 -0800
> Joshua Washington <joshwash at google.com> wrote:
>
> > From: Praveen Kaligineedi <pkaligineedi at google.com>
> >
> > Allocating QPL for an RX queue might fail if enough contiguous IOVA
> > memory cannot be allocated. However, the only requirement for QPL
> > for RX is that each 4K buffer be IOVA contiguous, not the entire
> > QPL. Therefore, use malloc to allocate 4K buffers if the allocation
> > using memzone fails.
> >
> > Signed-off-by: Praveen Kaligineedi <pkaligineedi at google.com>
> > Reviewed-by: Joshua Washington <joshwash at google.com>
> > ---
>
> Why keep the memzone code? rte_malloc and memzone are both coming from
> huge pages. Is there any advantage to memzone for what you are doing?
>
> Better to not have two potential allocation paths to test.