netdev - Re: [PATCH net-next v6 3/4] skbuff: Add a function to check if a page belongs to page

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Message-ID: <CAC_iWj+8srOuAxEMe5rt7vk1d=6V2ZDzjsHameaSt0a+rxwdhA@mail.gmail.com>
Date: Tue, 5 Dec 2023 13:02:46 +0200
From: Ilias Apalodimas <ilias.apalodimas@...aro.org>
To: Liang Chen <liangchen.linux@...il.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, hawk@...nel.org, linyunsheng@...wei.com, 
	netdev@...r.kernel.org, linux-mm@...ck.org, jasowang@...hat.com
Subject: Re: [PATCH net-next v6 3/4] skbuff: Add a function to check if a page
 belongs to page_pool

Hi Liang,

On Mon, 4 Dec 2023 at 04:40, Liang Chen <liangchen.linux@...il.com> wrote:
>
> On Fri, Dec 1, 2023 at 6:23 PM Ilias Apalodimas
> <ilias.apalodimas@...aro.org> wrote:
> >
> > The second time is the charm, apologize for the noise.. resending it
> > as plain-text
> >
> > On Thu, 30 Nov 2023 at 13:59, Liang Chen <liangchen.linux@...il.com> wrote:
> > >
> > > Wrap code for checking if a page is a page_pool page into a
> > > function for better readability and ease of reuse.
> > >
> > > Signed-off-by: Liang Chen <liangchen.linux@...il.com>
> > > Reviewed-by: Yunsheng Lin <linyunsheng@...wei.com>
> > > ---
> > >  net/core/skbuff.c | 7 ++++++-
> > >  1 file changed, 6 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/net/core/skbuff.c b/net/core/skbuff.c
> > > index b157efea5dea..31e57c29c556 100644
> > > --- a/net/core/skbuff.c
> > > +++ b/net/core/skbuff.c
> > > @@ -890,6 +890,11 @@ static void skb_clone_fraglist(struct sk_buff *skb)
> > >                 skb_get(list);
> > >  }
> > >
> > > +static bool skb_frag_is_pp_page(struct page *page)
> > > +{
> > > +       return (page->pp_magic & ~0x3UL) == PP_SIGNATURE;
> > > +}
> > > +
> >
> > That's fine, but why _frag? The same logic applies to non-fragmented pages no?
> > So rename it to skb_from_pp()?
> >
>
> Yeah, the same logic applies to non-fragmented pages. How about
> changing it to 'is_pp_page'? It takes a page as an argument instead of
> the entire skb.

Naming stuff is always hard. Any of skb_from_pp/is_pp_page would work for me

Thanks
/Ilias
> > [...]
> >
> > Thanks
> > /Ilias