Re: [PATCH bpf-next v5 2/4] xsk: Support UMEM chunk_size > PAGE_SIZE

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



> > -       pool->unaligned = unaligned;
> >         pool->frame_len = umem->chunk_size - umem->headroom -
> >                 XDP_PACKET_HEADROOM;
> > +       pool->unaligned = unaligned;
>
> nit: This change is not necessary.

Do you mind if we keep it? It makes the assignments better match the
order in the struct declaration.

> > -static void xp_check_dma_contiguity(struct xsk_dma_map *dma_map)
> > +static void xp_check_dma_contiguity(struct xsk_dma_map *dma_map, u32 page_size)
> >  {
> >         u32 i;
> >
> > -       for (i = 0; i < dma_map->dma_pages_cnt - 1; i++) {
> > -               if (dma_map->dma_pages[i] + PAGE_SIZE == dma_map->dma_pages[i + 1])
> > +       for (i = 0; i + 1 < dma_map->dma_pages_cnt; i++) {
>
> I think the previous version is clearer than this new one.

I like using `i + 1` since it matches the subscript usage. I'm used to
writing it like this for SIMD code where subtraction may wrap if the
length is unsigned, that doesn't matter in this case though. I can
restore the old way if you want.



[Index of Archives]     [Linux Samsung SoC]     [Linux Rockchip SoC]     [Linux Actions SoC]     [Linux for Synopsys ARC Processors]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]


  Powered by Linux