netdev - Re: [PATCH] bonding: avoid repeated display of same link status change

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Date:   Mon, 20 Aug 2018 12:02:47 -0700
From:   rama nichanamatlu <rama.nichanamatlu@...cle.com>
To:     netdev@...r.kernel.org, David Miller <davem@...emloft.net>
Subject: Re: [PATCH] bonding: avoid repeated display of same link status
 change

gentle request. may i have review comments pls ?

-Rama
On 08/13/2018 01:10 PM, Rama Nichanamatlu wrote:
> When link status change needs to be committed and rtnl lock couldn't be
> taken, avoid redisplay of same link status change message.
>
> Signed-off-by: Rama Nichanamatlu <rama.nichanamatlu@...cle.com>
> ---
>   drivers/net/bonding/bond_main.c |    6 ++++--
>   include/net/bonding.h           |    1 +
>   2 files changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index 63e3844..3dd1091 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -2086,7 +2086,7 @@ static int bond_miimon_inspect(struct bonding *bond)
>   			bond_propose_link_state(slave, BOND_LINK_FAIL);
>   			commit++;
>   			slave->delay = bond->params.downdelay;
> -			if (slave->delay) {
> +			if (slave->delay && !bond->rtnl_needed) {
>   				netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
>   					    (BOND_MODE(bond) ==
>   					     BOND_MODE_ACTIVEBACKUP) ?
> @@ -2126,7 +2126,7 @@ static int bond_miimon_inspect(struct bonding *bond)
>   			commit++;
>   			slave->delay = bond->params.updelay;
>   
> -			if (slave->delay) {
> +			if (slave->delay && !bond->rtnl_needed) {
>   				netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n",
>   					    slave->dev->name,
>   					    ignore_updelay ? 0 :
> @@ -2300,9 +2300,11 @@ static void bond_mii_monitor(struct work_struct *work)
>   		if (!rtnl_trylock()) {
>   			delay = 1;
>   			should_notify_peers = false;
> +			bond->rtnl_needed = true;
>   			goto re_arm;
>   		}
>   
> +		bond->rtnl_needed = false;
>   		bond_for_each_slave(bond, slave, iter) {
>   			bond_commit_link_state(slave, BOND_SLAVE_NOTIFY_LATER);
>   		}
> diff --git a/include/net/bonding.h b/include/net/bonding.h
> index 808f1d1..50d61cf 100644
> --- a/include/net/bonding.h
> +++ b/include/net/bonding.h
> @@ -234,6 +234,7 @@ struct bonding {
>   	struct	 dentry *debug_dir;
>   #endif /* CONFIG_DEBUG_FS */
>   	struct rtnl_link_stats64 bond_stats;
> +	bool rtnl_needed;
>   };
>   
>   #define bond_slave_get_rcu(dev) \