linux-kernel - Re: [PATCH] bonding: rate-limit bonding driver inspect messages

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Date: Tue, 20 Feb 2024 10:53:32 +0800
From: Hangbin Liu <liuhangbin@...il.com>
To: Praveen Kumar Kannoju <praveen.kannoju@...cle.com>
Cc: j.vosburgh@...il.com, andy@...yhouse.net, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	rajesh.sivaramasubramaniom@...cle.com, rama.nichanamatlu@...cle.com,
	manjunath.b.patil@...cle.com
Subject: Re: [PATCH] bonding: rate-limit bonding driver inspect messages

Hi Praveen,

You need to target the branch name in subject. e.g.

[PATCH net-next] bonding: ...

On Mon, Feb 19, 2024 at 07:07:21PM +0530, Praveen Kumar Kannoju wrote:
> Through the routine bond_mii_monitor(), bonding driver inspects and commits the
> slave state changes. During the times when slave state change and failure in
> aqcuiring rtnl lock happen at the same time, the routine bond_mii_monitor()
> reschedules itself to come around after 1 msec to commit the new state.
> 
> During this, it executes the routine bond_miimon_inspect() to re-inspect the
> state chane and prints the corresponding slave state on to the console. Hence
> we do see a message at every 1 msec till the rtnl lock is acquired and state
> chage is committed.
> 
> This patch doesn't change how bond functions. It only simply limits this kind
> of log flood.
> 
> v2: Use exising net_ratelimit() instead of introducing new rate-limit
> parameter.
> 
> v3: Commit message is modified to provide summary of the issue, because of
> which rate-limiting the bonding driver messages is needed.
> 
> Signed-off-by: Praveen Kumar Kannoju <praveen.kannoju@...cle.com>


For the change log, you can put it after sign off. e.g.

Signed-off-by: Praveen Kumar Kannoju <praveen.kannoju@...cle.com>
---
v3: ...
v2: ...
---

Here is an example https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html#changes-requested

Thanks
Hangbin

> ---
>  drivers/net/bonding/bond_main.c | 36 ++++++++++++++++++++----------------
>  1 file changed, 20 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index 4e0600c..e92eba1 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -2610,12 +2610,13 @@ static int bond_miimon_inspect(struct bonding *bond)
>  			commit++;
>  			slave->delay = bond->params.downdelay;
>  			if (slave->delay) {
> -				slave_info(bond->dev, slave->dev, "link status down for %sinterface, disabling it in %d ms\n",
> -					   (BOND_MODE(bond) ==
> -					    BOND_MODE_ACTIVEBACKUP) ?
> -					    (bond_is_active_slave(slave) ?
> -					     "active " : "backup ") : "",
> -					   bond->params.downdelay * bond->params.miimon);
> +				if (net_ratelimit())
> +					slave_info(bond->dev, slave->dev, "link status down for %sinterface, disabling it in %d ms\n",
> +						   (BOND_MODE(bond) ==
> +						   BOND_MODE_ACTIVEBACKUP) ?
> +						   (bond_is_active_slave(slave) ?
> +						   "active " : "backup ") : "",
> +						   bond->params.downdelay * bond->params.miimon);
>  			}
>  			fallthrough;
>  		case BOND_LINK_FAIL:
> @@ -2623,9 +2624,10 @@ static int bond_miimon_inspect(struct bonding *bond)
>  				/* recovered before downdelay expired */
>  				bond_propose_link_state(slave, BOND_LINK_UP);
>  				slave->last_link_up = jiffies;
> -				slave_info(bond->dev, slave->dev, "link status up again after %d ms\n",
> -					   (bond->params.downdelay - slave->delay) *
> -					   bond->params.miimon);
> +				if (net_ratelimit())
> +					slave_info(bond->dev, slave->dev, "link status up again after %d ms\n",
> +						   (bond->params.downdelay - slave->delay) *
> +						   bond->params.miimon);
>  				commit++;
>  				continue;
>  			}
> @@ -2648,18 +2650,20 @@ static int bond_miimon_inspect(struct bonding *bond)
>  			slave->delay = bond->params.updelay;
>  
>  			if (slave->delay) {
> -				slave_info(bond->dev, slave->dev, "link status up, enabling it in %d ms\n",
> -					   ignore_updelay ? 0 :
> -					   bond->params.updelay *
> -					   bond->params.miimon);
> +				if (net_ratelimit())
> +					slave_info(bond->dev, slave->dev, "link status up, enabling it in %d ms\n",
> +						   ignore_updelay ? 0 :
> +						   bond->params.updelay *
> +						   bond->params.miimon);
>  			}
>  			fallthrough;
>  		case BOND_LINK_BACK:
>  			if (!link_state) {
>  				bond_propose_link_state(slave, BOND_LINK_DOWN);
> -				slave_info(bond->dev, slave->dev, "link status down again after %d ms\n",
> -					   (bond->params.updelay - slave->delay) *
> -					   bond->params.miimon);
> +				if (net_ratelimit())
> +					slave_info(bond->dev, slave->dev, "link status down again after %d ms\n",
> +						   (bond->params.updelay - slave->delay) *
> +						   bond->params.miimon);
>  				commit++;
>  				continue;
>  			}
> -- 
> 1.8.3.1
>