netdev - Re: [net-next PATCH 3/7] net: sched: add cls

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Date:	Tue, 9 Feb 2016 03:09:44 -0800
From:	"Fastabend, John R" <john.fastabend@...il.com>
To:	"Amir Vadai\"" <amir@...ai.me>
Cc:	ogerlitz@...lanox.com, jiri@...nulli.us, jhs@...atatu.com,
	jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
	davem@...emloft.net
Subject: Re: [net-next PATCH 3/7] net: sched: add cls_u32 offload hooks for
 netdevs

On 2/4/2016 5:18 AM, Amir Vadai" wrote:
> On Wed, Feb 03, 2016 at 01:28:37AM -0800, John Fastabend wrote:
>> This patch allows netdev drivers to consume cls_u32 offloads via
>> the ndo_setup_tc ndo op.
>>
>> This works aligns with how network drivers have been doing qdisc
>> offloads for mqprio.
>>
>> Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
>> ---

[...]

>> +enum {
>> +	TC_CLSU32_NEW_KNODE,
> TC_CLSU32_NEW_KNODE is never used

aha yep that snuck in there. In a follow up patch for the fm10k devices
where we can support hash tables (e.g. divisor > 1) I use it. Although
on closer inspection I need to check that the divisor == 1 on ixgbe or
else abort because we can get out of sync if software expects hash
tables here.

Thanks, nice catch.

> 
> [...]
>