netdev - Re: [net-next-2.6 PATCH 4/4] net_sched: add MQSAFE flag to qdisc to identify mq like qdiscs

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Date:	Tue, 21 Dec 2010 11:21:46 -0800
From:	John Fastabend <john.r.fastabend@...el.com>
To:	Ben Hutchings <bhutchings@...arflare.com>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"hadi@...erus.ca" <hadi@...erus.ca>,
	"shemminger@...tta.com" <shemminger@...tta.com>,
	"tgraf@...radead.org" <tgraf@...radead.org>,
	"eric.dumazet@...il.com" <eric.dumazet@...il.com>,
	"nhorman@...driver.com" <nhorman@...driver.com>
Subject: Re: [net-next-2.6 PATCH 4/4] net_sched: add MQSAFE flag to qdisc
 to identify mq like qdiscs

On 12/20/2010 3:22 PM, Ben Hutchings wrote:
> On Fri, 2010-12-17 at 07:34 -0800, John Fastabend wrote:
>> Add a MQSAFE flag to the qdisc schedulers that can be safely
>> managed by sch_mclass. Without this flag schedulers that are
>> not aware of multiple tx queues can be grafted under the
>> mclass qdisc. Allowing incorrect qdiscs to be grafted causes
>> an invalid mapping from qdisc's to netdevice queues.
> [...]
> 
> This should be defined before adding sch_mclass, or at the same time,
> not after.
> 
> Ben.
> 

Right. I'll roll it into the initial mclass patch. Thanks.
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