netdev - Re: [net-next 1/6] net/dcb: Add dcbnl buffer attribute

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Message-ID: <20180523132826.397d41a9@cakuba>
Date:   Wed, 23 May 2018 13:28:26 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     John Fastabend <john.fastabend@...il.com>
Cc:     Huy Nguyen <huyn@...lanox.com>, Jiri Pirko <jiri@...nulli.us>,
        Saeed Mahameed <saeedm@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Or Gerlitz <gerlitz.or@...il.com>
Subject: Re: [net-next 1/6] net/dcb: Add dcbnl buffer attribute

On Wed, 23 May 2018 09:03:53 -0700, John Fastabend wrote:
> On 05/23/2018 08:37 AM, Huy Nguyen wrote:
> > 
> > 
> > On 5/23/2018 8:52 AM, John Fastabend wrote:  
> >> It would be nice though if the API gave us some hint on max/min/stride
> >> of allowed values. Could the get API return these along with current
> >> value? Presumably the allowed max size could change with devlink buffer
> >> changes in how the global buffer is divided up as well.  
> > Acked. I will add Max. Let's skip min/stride since it is too hardware specific.  
> 
> At minimum then we need to document for driver writers what to do
> with a value that falls between strides. Round-up or round-down.

BTW I feel like stride would be a good addition to devlink-sb, too!