linux-kernel - Re: [PATCH 1/2] RDMA/rxe: add missing newline to rxe_set

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Date:   Wed, 23 Aug 2023 14:12:24 +0800
From:   Zhu Yanjun <yanjun.zhu@...ux.dev>
To:     Li Zhijian <lizhijian@...itsu.com>, linux-rdma@...r.kernel.org
Cc:     zyjzyj2000@...il.com, jgg@...pe.ca, leon@...nel.org,
        linux-kernel@...r.kernel.org, rpearsonhpe@...il.com
Subject: Re: [PATCH 1/2] RDMA/rxe: add missing newline to rxe_set_mtu message

在 2023/8/23 10:13, Li Zhijian 写道:
> A newline help flushing message out.

rxe_info_dev will finally call printk to output information.

In this link 
https://github.com/torvalds/linux/blob/master/Documentation/core-api/printk-basics.rst,
"
All printk() messages are printed to the kernel log buffer, which is a 
ring buffer exported to userspace through /dev/kmsg. The usual way to 
read it is using dmesg.
"
Do you mean that a new line will help the kernel log buffer flush 
message out?

Zhu Yanjun
> 
> Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
> ---
>   drivers/infiniband/sw/rxe/rxe.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c
> index 54c723a6edda..cb2c0d54aae1 100644
> --- a/drivers/infiniband/sw/rxe/rxe.c
> +++ b/drivers/infiniband/sw/rxe/rxe.c
> @@ -161,7 +161,7 @@ void rxe_set_mtu(struct rxe_dev *rxe, unsigned int ndev_mtu)
>   	port->attr.active_mtu = mtu;
>   	port->mtu_cap = ib_mtu_enum_to_int(mtu);
>   
> -	rxe_info_dev(rxe, "Set mtu to %d", port->mtu_cap);
> +	rxe_info_dev(rxe, "Set mtu to %d\n", port->mtu_cap);
>   }
>   
>   /* called by ifc layer to create new rxe device.