linux-kernel - Re: [PATCH v2 net-next] udp: introduce __sk_mem

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Message-ID: <ZAX98D91HvKrJBCO@corigine.com>
Date:   Mon, 6 Mar 2023 15:51:28 +0100
From:   Simon Horman <simon.horman@...igine.com>
To:     Jason Xing <kerneljasonxing@...il.com>
Cc:     willemdebruijn.kernel@...il.com, davem@...emloft.net,
        dsahern@...nel.org, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        Jason Xing <kernelxing@...cent.com>
Subject: Re: [PATCH v2 net-next] udp: introduce __sk_mem_schedule() usage

On Mon, Mar 06, 2023 at 07:57:45PM +0800, Jason Xing wrote:
> From: Jason Xing <kernelxing@...cent.com>
> 
> Keep the accounting schema consistent across different protocols
> with __sk_mem_schedule(). Besides, it adjusts a little bit on how
> to calculate forward allocated memory compared to before. After
> applied this patch, we could avoid receive path scheduling extra
> amount of memory.
> 
> Link: https://lore.kernel.org/lkml/20230221110344.82818-1-kerneljasonxing@gmail.com/
> Signed-off-by: Jason Xing <kernelxing@...cent.com>
> ---
> V2:
> 1) change the title and body message
> 2) use __sk_mem_schedule() instead suggested by Paolo Abeni
> ---
>  net/ipv4/udp.c | 31 ++++++++++++++++++-------------
>  1 file changed, 18 insertions(+), 13 deletions(-)
> 
> diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
> index 9592fe3e444a..21c99087110d 100644
> --- a/net/ipv4/udp.c
> +++ b/net/ipv4/udp.c
> @@ -1531,10 +1531,23 @@ static void busylock_release(spinlock_t *busy)
>  		spin_unlock(busy);
>  }
>  
> +static inline int udp_rmem_schedule(struct sock *sk, int size)

nit: I think it's best to drop the inline keyword and
     let the compiler figure that out.