Subject: Re: [PATCH net-next 3/3] RDS-TCP: Set up MSG_MORE and MSG_SENDPAGE_NOTLAST as appropriate in rds_tcp_xmit

From: Sergei Shtylyov <[email-masked]>
Date: Wed, 30 Sep 2015 17:53:20 +0300

Hello.

On 09/30/2015 04:45 PM, Sowmini Varadhan wrote:

> For the same reasons as 2f53384424 and 35f9c09fe9, rds_tcp_xmit
> may have multiple pages to send, so use the MSG_MORE and
> MSG_SENDPAGE_NOTLAST as hints to tcp_sendpage()
>
> Signed-off-by: Sowmini Varadhan <[email-masked]>
> ---
>   net/rds/tcp_send.c |    8 +++++++-
>   1 files changed, 7 insertions(+), 1 deletions(-)
>
> diff --git a/net/rds/tcp_send.c b/net/rds/tcp_send.c
> index 53b17ca..5f3e3fa 100644
> --- a/net/rds/tcp_send.c
> +++ b/net/rds/tcp_send.c
[...]
> @@ -116,12 +117,15 @@ int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
>   			goto out;
>   	}
>
> +	more = (rm->data.op_nents > 1 ? (MSG_MORE | MSG_SENDPAGE_NOTLAST) : 0);

    No need for either inner or outer parens.

>   	while (sg < rm->data.op_nents) {
> +		int flags = (MSG_DONTWAIT | MSG_NOSIGNAL | more);

    Parens not needed as well.

[...]

MBR, Sergei