netdev - Re: [patch net-next v3 11/15] netdevsim: implement proper devlink reload

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Date:   Fri, 4 Oct 2019 10:42:17 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, idosch@...lanox.com,
        dsahern@...il.com, tariqt@...lanox.com, saeedm@...lanox.com,
        kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org, shuah@...nel.org,
        mlxsw@...lanox.com
Subject: Re: [patch net-next v3 11/15] netdevsim: implement proper devlink
 reload

On Fri, 4 Oct 2019 08:19:14 +0200, Jiri Pirko wrote:
> >> @@ -84,20 +82,10 @@ int nsim_fib_set_max(struct nsim_fib_data *fib_data,
> >>  		entry = &fib_data->ipv6.rules;
> >>  		break;
> >>  	default:
> >> -		return 0;
> >> -	}
> >> -
> >> -	/* not allowing a new max to be less than curren occupancy
> >> -	 * --> no means of evicting entries
> >> -	 */
> >> -	if (val < entry->num) {
> >> -		NL_SET_ERR_MSG_MOD(extack, "New size is less than current occupancy");
> >> -		err = -EINVAL;  
> >
> >This change in behaviour should perhaps be mentioned in the commit
> >message. The reload will no longer fail if the resources are
> >insufficient.   
> 
> Reload is going to fail if the resources are insufficient. I have a
> selftest for that, please see the last patch.

Oh, because re-registering the fib notifier itself will fail? 
All good then, thanks.

> >Since we want to test reload more widely than just for the FIB limits
> >that does make sense to me. Is that the thinking?