linux-kernel - Re: [PATCH net-next v1] net: page_pool: factor out page

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Date: Fri, 8 Mar 2024 16:04:14 -0800
From: Mina Almasry <almasrymina@...gle.com>
To: David Wei <dw@...idwei.uk>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Jesper Dangaard Brouer <hawk@...nel.org>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Yunsheng Lin <linyunsheng@...wei.com>
Subject: Re: [PATCH net-next v1] net: page_pool: factor out page_pool recycle check

On Fri, Mar 8, 2024 at 3:50 PM David Wei <dw@...idwei.uk> wrote:
>
> On 2024-03-08 12:44, Mina Almasry wrote:
> > The check is duplicated in 2 places, factor it out into a common helper.
> >
> > Signed-off-by: Mina Almasry <almasrymina@...gle.com>
> > Reviewed-by: Yunsheng Lin <linyunsheng@...wei.com>
> > ---
> >  net/core/page_pool.c | 9 +++++++--
> >  1 file changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/net/core/page_pool.c b/net/core/page_pool.c
> > index d706fe5548df..dd364d738c00 100644
> > --- a/net/core/page_pool.c
> > +++ b/net/core/page_pool.c
> > @@ -657,6 +657,11 @@ static bool page_pool_recycle_in_cache(struct page *page,
> >       return true;
> >  }
> >
> > +static bool __page_pool_page_can_be_recycled(const struct page *page)
>
> Could this be made inline?
>

Looking at the rest of the static functions in this file, they don't
specify inline, just static. I guess the compiler is smart enough to
inline static functions in .c files when it makes sense (and does not
when it doesn't)?

But this doesn't seem to be a kernel wide thing. net/core/dev.c does
have static inline functions in it, only page_pool.c doesn't do it. I
guess if there are no objections I can make it static inline to ask
the compiler to inline it. Likely after the merge window reopens if it
closes today.