Re: [RFC PATCH v3 08/12] net: support non paged skb frags

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

 



On Thu, Nov 9, 2023 at 1:15 AM Paolo Abeni <pabeni@xxxxxxxxxx> wrote:
>
> On Sun, 2023-11-05 at 18:44 -0800, Mina Almasry wrote:
> [...]
> > @@ -3421,7 +3446,7 @@ static inline struct page *skb_frag_page(const skb_frag_t *frag)
> >   */
> >  static inline void __skb_frag_ref(skb_frag_t *frag)
> >  {
> > -     get_page(skb_frag_page(frag));
> > +     page_pool_page_get_many(frag->bv_page, 1);
>
> I guess the above needs #ifdef CONFIG_PAGE_POOL guards and explicit
> skb_frag_is_page_pool_iov() check ?
>

It doesn't actually. page_pool_page_* helpers are compiled in
regardless of CONFIG_PAGE_POOL, and handle both page_pool_iov* & page*
just fine (the checking happens inside the function).

You may yell at me that it's too confusing... I somewhat agree, but
I'm unsure of what is a better name or location for the helpers. The
helpers handle (page_pool_iov* || page*) gracefully, so they seem to
belong in the page pool for me, but it is indeed surprising/confusing
that these helpers are available even if !CONFIG_PAGE_POOL.

>
> Cheers,
>
> Paolo
>
>


-- 
Thanks,
Mina





[Index of Archives]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Device Mapper]

  Powered by Linux